The document describes a study on blind image deblurring using a blind deconvolution algorithm. It discusses how blurring occurs in images and various techniques used for image restoration. The proposed method uses a blind deconvolution technique to restore an original sharp image from a blurred input image without prior knowledge of the point spread function. It adds blur to test images using Gaussian, motion and average blur models. The algorithm then applies maximum likelihood estimation and blind deconvolution to restore the blurred image. Experimental results show that the blind deconvolution method can deblur images faster than conventional approaches.
A survey on human face recognition invariant to illuminationIAEME Publication
This document provides a survey of techniques for human face recognition that are invariant to illumination. It begins with an introduction to face recognition and the challenges posed by illumination variation. It then describes several preprocessing techniques that have been used to address illumination issues, including histogram equalization, adaptive histogram equalization, discrete cosine transform, discrete wavelet transform, and local binary pattern methods. The document concludes by comparing the performance of these various preprocessing techniques on standard face recognition databases based on error rates reported in other studies.
IRJET- Comparison and Simulation based Analysis of an Optimized Block Mat...IRJET Journal
This document compares an optimized block matching algorithm to the four step search algorithm. It first provides background on block matching algorithms and motion estimation techniques used in video compression. It then describes the existing four step search algorithm and its process of checking 17-27 points to find the best motion vector match. The document proposes a new simpler and more efficient four step search algorithm that separates the search area into quadrants. It checks 3 points in the first phase to select a quadrant, then finds the lowest cost point in the second phase to set as the new origin, reducing computational complexity compared to the standard four step search.
IRJET- DNA Fragmentation Pattern and its Application in DNA Sample Type Class...IRJET Journal
This document proposes a framework for classifying DNA sample types using DNA fragmentation patterns. It involves several steps: (1) applying Gaussian blurring and bilateral filtering to reduce noise from images of fragmentation patterns, (2) extracting the region of interest, (3) calculating gray-level co-occurrence matrix features such as contrast and correlation, (4) using a k-nearest neighbors classifier to classify samples, and (5) segmenting images based on the classification. The results showed near 100% accuracy in classifying hundreds of DNA samples as different types based on their fragmentation patterns.
Image deblurring based on spectral measures of whitenessijma
Image Deblurring is an ill-posed inverse problem used to reconstruct the sharp image from the unknown
blurred image. This process involves restoration of high frequency information from the blurred image. It
includes a learning technique which initially focuses on the main edges of the image and then gradually
takes details into account. As blind image deblurring is ill-posed, it has infinite number of solutions leading
to an ill-conditioned blur operator. So regularization or prior knowledge on both the unknown image and
the blur operator is needed to address this problem. The performance of this optimization problem depends
on the regularization parameter and the iteration number. In already existing methods the iterations have
to be manually stopped. In this paper, a new idea is proposed to regulate the number of iterations and the
regularization parameter automatically. The proposed criteria yields, on average, an ISNR only 0.38dB
below what is obtained by manual stopping. The results obtained with synthetically blurred images are
good and considerable, even when the blur operator is ill-conditioned and the blurred image is noisy.
A vlsi architecture for efficient removal of noises and enhancement of imagesIAEME Publication
This document summarizes a proposed VLSI architecture for removing noise and enhancing images. The architecture uses a decision tree-based approach with three modules: an isolation module to identify noisy pixels, a fringe module to determine if pixels are on edges, and a similarity module to further analyze pixels. Noisy pixels are replaced with reconstructed values from an edge-preserving filter. Histogram equalization is then applied to improve image quality. The proposed architecture is implemented on FPGA and evaluated on different types of noises using metrics like PSNR and MSE.
Multimodality medical image fusion using improved contourlet transformationIAEME Publication
1. The document presents a technique for medical image fusion using an improved contourlet transformation with log Gabor filters.
2. It proposes decomposing images using a contourlet transformation with modified directional filter banks that incorporate log Gabor filters. This aims to provide high quality fused images while localizing features accurately and minimizing noise.
3. Experimental results on fusing medical images show that the proposed technique achieves higher quality measurements like PSNR compared to a basic contourlet transformation fusion approach.
A Review on Image Segmentation using Clustering and Swarm Optimization Techni...IJSRD
The process of dividing an image into multiple regions (set of pixels) is known as Image segmentation. It will make an image easy and smooth to evaluate. Image segmentation objective is to generate image more simple and meaningful. In this paper present a survey on image segmentation general segmentation techniques, clustering algorithms and optimization methods. Also a study of different research also been presented. The latest research in each of image segmentation methods is presented in this study. This paper presents the recent research in biologically inspired swarm optimization techniques, including ant colony optimization algorithm, particle swarm optimization algorithm, artificial bee colony algorithm and their hybridizations, which are applied in several fields.
Deblurring Image and Removing Noise from Medical Images for Cancerous Disease...IRJET Journal
This document summarizes a research paper that uses a Wiener filter to deblur and remove noise from medical images for cancer detection. The paper introduces different types of image blurring and noise, as well as deblurring and noise removal techniques. It then describes experiments using a Wiener filter on blurred and noisy medical images. The Wiener filter is shown to effectively deblur images and remove noise, improving image quality as measured by metrics like PSNR, MSE, RMSE and SSIM. The findings suggest the Wiener filter is a powerful tool for processing medical images.
A survey on human face recognition invariant to illuminationIAEME Publication
This document provides a survey of techniques for human face recognition that are invariant to illumination. It begins with an introduction to face recognition and the challenges posed by illumination variation. It then describes several preprocessing techniques that have been used to address illumination issues, including histogram equalization, adaptive histogram equalization, discrete cosine transform, discrete wavelet transform, and local binary pattern methods. The document concludes by comparing the performance of these various preprocessing techniques on standard face recognition databases based on error rates reported in other studies.
IRJET- Comparison and Simulation based Analysis of an Optimized Block Mat...IRJET Journal
This document compares an optimized block matching algorithm to the four step search algorithm. It first provides background on block matching algorithms and motion estimation techniques used in video compression. It then describes the existing four step search algorithm and its process of checking 17-27 points to find the best motion vector match. The document proposes a new simpler and more efficient four step search algorithm that separates the search area into quadrants. It checks 3 points in the first phase to select a quadrant, then finds the lowest cost point in the second phase to set as the new origin, reducing computational complexity compared to the standard four step search.
IRJET- DNA Fragmentation Pattern and its Application in DNA Sample Type Class...IRJET Journal
This document proposes a framework for classifying DNA sample types using DNA fragmentation patterns. It involves several steps: (1) applying Gaussian blurring and bilateral filtering to reduce noise from images of fragmentation patterns, (2) extracting the region of interest, (3) calculating gray-level co-occurrence matrix features such as contrast and correlation, (4) using a k-nearest neighbors classifier to classify samples, and (5) segmenting images based on the classification. The results showed near 100% accuracy in classifying hundreds of DNA samples as different types based on their fragmentation patterns.
Image deblurring based on spectral measures of whitenessijma
Image Deblurring is an ill-posed inverse problem used to reconstruct the sharp image from the unknown
blurred image. This process involves restoration of high frequency information from the blurred image. It
includes a learning technique which initially focuses on the main edges of the image and then gradually
takes details into account. As blind image deblurring is ill-posed, it has infinite number of solutions leading
to an ill-conditioned blur operator. So regularization or prior knowledge on both the unknown image and
the blur operator is needed to address this problem. The performance of this optimization problem depends
on the regularization parameter and the iteration number. In already existing methods the iterations have
to be manually stopped. In this paper, a new idea is proposed to regulate the number of iterations and the
regularization parameter automatically. The proposed criteria yields, on average, an ISNR only 0.38dB
below what is obtained by manual stopping. The results obtained with synthetically blurred images are
good and considerable, even when the blur operator is ill-conditioned and the blurred image is noisy.
A vlsi architecture for efficient removal of noises and enhancement of imagesIAEME Publication
This document summarizes a proposed VLSI architecture for removing noise and enhancing images. The architecture uses a decision tree-based approach with three modules: an isolation module to identify noisy pixels, a fringe module to determine if pixels are on edges, and a similarity module to further analyze pixels. Noisy pixels are replaced with reconstructed values from an edge-preserving filter. Histogram equalization is then applied to improve image quality. The proposed architecture is implemented on FPGA and evaluated on different types of noises using metrics like PSNR and MSE.
Multimodality medical image fusion using improved contourlet transformationIAEME Publication
1. The document presents a technique for medical image fusion using an improved contourlet transformation with log Gabor filters.
2. It proposes decomposing images using a contourlet transformation with modified directional filter banks that incorporate log Gabor filters. This aims to provide high quality fused images while localizing features accurately and minimizing noise.
3. Experimental results on fusing medical images show that the proposed technique achieves higher quality measurements like PSNR compared to a basic contourlet transformation fusion approach.
A Review on Image Segmentation using Clustering and Swarm Optimization Techni...IJSRD
The process of dividing an image into multiple regions (set of pixels) is known as Image segmentation. It will make an image easy and smooth to evaluate. Image segmentation objective is to generate image more simple and meaningful. In this paper present a survey on image segmentation general segmentation techniques, clustering algorithms and optimization methods. Also a study of different research also been presented. The latest research in each of image segmentation methods is presented in this study. This paper presents the recent research in biologically inspired swarm optimization techniques, including ant colony optimization algorithm, particle swarm optimization algorithm, artificial bee colony algorithm and their hybridizations, which are applied in several fields.
Deblurring Image and Removing Noise from Medical Images for Cancerous Disease...IRJET Journal
This document summarizes a research paper that uses a Wiener filter to deblur and remove noise from medical images for cancer detection. The paper introduces different types of image blurring and noise, as well as deblurring and noise removal techniques. It then describes experiments using a Wiener filter on blurred and noisy medical images. The Wiener filter is shown to effectively deblur images and remove noise, improving image quality as measured by metrics like PSNR, MSE, RMSE and SSIM. The findings suggest the Wiener filter is a powerful tool for processing medical images.
International Journal of Computational Engineering Research (IJCER) is dedicated to protecting personal information and will make every reasonable effort to handle collected information appropriately. All information collected, as well as related requests, will be handled as carefully and efficiently as possible in accordance with IJCER standards for integrity and objectivity
Survey on Various Image Denoising TechniquesIRJET Journal
This document summarizes several techniques for image denoising. It begins by defining image noise and explaining how noise degrades image quality. It then reviews 7 different published techniques for image denoising, summarizing the key aspects of each technique. These include methods using local spectral component decomposition, SVD-based denoising, patch-based near-optimal denoising, LPG-PCA denoising, trivariate shrinkage filtering, SURE-LET denoising, and 3D transform-domain collaborative filtering. The document concludes that LSCD provides better denoising results according to PSNR analysis and provides an overview of the state-of-the-art in image denoising techniques.
An Enhanced Adaptive Wavelet Transform Image Inpainting TechniqueIRJET Journal
The document discusses an enhanced adaptive wavelet transform image inpainting technique. It begins with an abstract that describes image inpainting as recovering missing regions of an image through various techniques. It then provides background on image inpainting, including different categories and applications. The proposed approach uses wavelet transform methods to restore complex image structures with large curvature. Evaluation is based on patch size and peak signal-to-noise ratio (PSNR) value.
IRJET- A Comprehensive Study on Image Defogging TechniquesIRJET Journal
This document summarizes techniques for removing haze and other pollutants from images. It discusses using a dark channel prior method based on observations that at least one color channel has pixels with low values. Transmission maps and atmospheric light can be estimated using this dark channel prior. The document also discusses using depth estimation, wavelet-based techniques, enhancement-based techniques, filtering-based techniques, supervised learning-based techniques, fusion-based techniques, and meta-heuristic system-based techniques for haze removal. It provides an overview of these different haze removal techniques.
Inflammatory Conditions Mimicking Tumours In Calabar: A 30 Year Study (1978-2...IOSR Journals
1. The document discusses different image fusion techniques, specifically wavelet transform and curvelet transform based fusion.
2. Wavelet transform is commonly used for image fusion due to its simplicity and ability to preserve time-frequency details. Curvelet transform is better for fusing images with curved edges.
3. The paper compares fusion results of medical images like MR and CT using wavelet and curvelet transforms, finding that curvelet transform provides superior results in metrics like entropy and peak signal-to-noise ratio.
A Review of Image Contrast Enhancement TechniquesIRJET Journal
This document reviews several techniques for image contrast enhancement. It begins with an introduction to image enhancement and its goals of improving visual appearance and clarity. The paper then surveys key approaches for contrast enhancement including histogram equalization, discrete wavelet transform, and other spatial and frequency domain methods. Finally, the conclusion is that contrast enhancement using digital image processing continues to be an active area of research that can help solve problems across many fields involving image analysis.
This document compares the performance of image restoration techniques in the time and frequency domains. It proposes a new algorithm to denoise images corrupted by salt and pepper noise. The algorithm replaces noisy pixel values within a 3x3 window with a weighted median based on neighboring pixels. It applies filters like CLAHE, average, Wiener and median filtering before the proposed algorithm to further remove noise. Experimental results on test images show the proposed method achieves better noise removal compared to other techniques, with around a 60% increase in PSNR and 90% reduction in MSE. In conclusion, the proposed algorithm is effective at restoring images with high density salt and pepper noise.
IRJET- Texture Analysis and Fracture Identification of Bones X-Ray Images...IRJET Journal
This document presents a study on developing an image processing system for classifying bone fractures using X-ray images. The proposed system uses preprocessing, feature selection, feature extraction using GLCM, and classification with K-Means clustering and SVM. X-ray images of fractured and non-fractured bones are obtained, preprocessed to remove noise, and features are selected using DWT. GLCM is used to extract texture features like entropy, contrast and homogeneity. K-Means clustering groups similar features and SVM classifies images as fractured or non-fractured. The system achieves 90% accuracy in fracture detection and classification.
Progressive Image Denoising Through Hybrid Graph Laplacian Regularization: A ...john236zaq
The document discusses a proposed unified framework for progressively recovering images from corrupted observations through hybrid graph Laplacian regularization. The framework first constructs a multiscale representation of the target image using a Laplacian pyramid. It then progressively recovers the degraded image from coarse to fine scales, allowing for recovery of sharp edges and texture. Within each scale, a graph Laplacian regularization model is learned that minimizes error while preserving image structure. Between scales, the model is extended to a high-dimensional feature space to describe interscale correlations and propagate local structure regularity from coarser to finer scales. Experimental results on impulse noise removal demonstrate better performance than state-of-the-art algorithms.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
IRJET- Skin Cancer Detection using Local and Global Contrast StretchingIRJET Journal
This paper aims to identify efficient image enhancement techniques to detect skin cancer. It focuses on local and global contrast stretching techniques. The techniques enhance images by spreading out the range of pixel intensities to improve contrast. The paper proposes a method using edge detection, color detection, image segmentation, and lesion detection on input images. Various parameters are then calculated to determine if an image shows cancerous or non-cancerous properties. Local and global contrast stretching is shown to enhance images and help in skin cancer detection by calculating these diagnostic parameters.
IRJET- Digit Identification in Natural ImagesIRJET Journal
The document describes a technique to locate and recognize numbers in natural images. It involves preprocessing the image using Gaussian blur for smoothing, edge detection using Sobel or Canny operators, finding maximally stable extremal regions (MSER) to identify candidate objects, segmenting individual digits using vertical projection or contours, extracting features of each segmented digit, and classifying the digits using a technique like K-nearest neighbors. The technique aims to recognize numbers without requiring extensive training data, thus saving memory and computation time compared to traditional optical character recognition systems. Room for future improvement includes handling complex backgrounds better to make the approach more robust.
Restoration of Old Documents that Suffer from DegradationIRJET Journal
This document presents a new approach for restoring old documents that have suffered degradation. The approach proceeds in three steps: 1) Separating the foreground and background of the image using gamma correction and histogram stretching. 2) Further separating the foreground from remaining noise pixels. 3) Reconstructing the final restored image by combining the obtained foreground and background. Key aspects of the approach include extracting the background using mean and mode operations and removing uneven background colors, extracting the foreground by subtracting the background, and applying gamma correction and contrast stretching for enhancement. The approach aims to accurately restore degraded ancient documents affected by issues like scanning noise and aging effects.
A novel approach for efficient skull stripping using morphological reconstruc...eSAT Journals
This document presents a novel two-step approach for skull stripping of MRI brain images. The first step uses morphological reconstruction operations including erosion, opening by reconstruction, dilation, and opening-closing by reconstruction to generate a primary segmentation mask. The second step applies thresholding to the primary mask to extract the final skull-stripped brain image. The method is tested on axial PD and FLAIR MRI images and achieves high Jaccard and Dice similarity scores compared to manually stripped images, demonstrating its effectiveness at skull stripping.
An Efficient Approach of Segmentation and Blind Deconvolution in Image Restor...iosrjce
This paper introduces the concept of Blind Deconvolution for restoration of a digital image and
small segments of a single image that has been degraded due to some noise. Concept of Image Restoration is
used in various areas like in Robotics to take decision, Biomedical research for analysis of tissues, cells and
cellular constituents etc. Segmentation is used to divide an image into multiple meaningful regions. Concept of
segmentation is helpful for restoration of only selected portion of the image hence reduces the complexity of the
system by focusing only on those parts of the image that need to be restored. There exist so many techniques for
the restoration of a degraded image like Wiener filter, Regularized filter, Lucy Richardson algorithm etc. All
these techniques use prior knowledge of blur kernel for restoration process. In Blind Deconvolution technique
Blur kernel initially remains unknown. This paper uses Gaussian low pass filter to convolve an image. Gaussian
low pass filter minimize the problem of ringing effect. Ringing effect occurs in image when transition between
one point to another is not clearly defined. After removing these ringing effects from the restored image,
resultant image will be clear in visibility. The aim of this paper is to provide better algorithm that can be helpful
in removing unwanted features from the image and the quality of the image can be measured in terms of
PSNR(Peak Signal-to-Noise Ratio) and MSE(Mean Square error). Proposed Technique also works well with
Motion Blur.
MULTI WAVELET BASED IMAGE COMPRESSION FOR TELE MEDICAL APPLICATIONprj_publication
Analysis and compression of medical image is an important area of biomedical
engineering. Analysis of medical image and data compression are rapidly evolving field with
growing applications in the teleradiology, Bio-medical, tele-medicine and medical data
analysis. Wavelet based techniques are latest development in the field of medical image
compression. The ROI must be compressed by a Lossless or a near lossless compression
algorithm. Wavelet based techniques are most recent growth in the area of medical image
compression.
Wavelet multi-resolution decomposition of images has shown its efficiency in many
image processing areas and specifically in compression. Transformed coefficients are
obtained by expanding a signal on a wavelet basis. The transformed signal is a different
representation of the same underlying data. Such representation is efficient if a relevant part
of the original information is found in a relative small number of coefficients. In this sense,
wavelets are near optimal bases for a wide class of signals with some smoothness, which is
the reason for compression.
Keywords: Image compression, Integer Multiwavelet Transform.
1. INTRODUCTION
Image Compression is used to reduce the number of bits required to represent an
image or a video sequence. A Compression algorithm takes an input X and generates
compressed information that requires fewer bits. The Decompression algorithm reconstructs
the compressed information and gives the original.
A compression of medical image is an important area of biomedical and telemedici
This document summarizes a research paper that proposes a two-stage method for enhancing low quality fingerprint images. The first stage uses a ridge-compensation filter in the spatial domain to enhance ridge pixels and reduce non-ridge pixels. The second stage uses polar coordinates and separates filters into radial and angular domains. Local orientation and frequency are estimated based on learning from images. Frequency band pass filtering is then applied using the estimated local orientation and frequency maps. The two-stage approach enhances fingerprint images in both the spatial and frequency domains to improve low quality images.
Fuzzy Logic Based Decision System For PCB Defects CorrectionIJERA Editor
he size, ease of automation, increasing durability and reliability of any circuit being developed. Defect & errors while developments are much obvious. Detecting them is primary part but taking decision for correction of same in testing specimen will be effective or not is much more crucial. Sometimes defect correction in the PCB is much more efficient then reprinting, in terms of time, resource and cost with respect to production. Making decision manually is tiresome & less efficient. So in this paper a novel method of decision making system based on fuzzy logic is proposed which takes decision whether the testing specimen should undergo correction or reprinting. Fuzzy based system takes decision in the way humans do. Results shown for the proposed system are quite promising in decision making.
This document presents a novel two-step approach for skull stripping MRI brain images. The first step uses morphological reconstruction operations to generate a mask of the brain. The second step applies thresholding to the mask to extract the brain. The method was tested on axial PD and FLAIR MRI images. Results found Jaccard and Dice similarity scores above 0.8 and 0.9 respectively, indicating the method efficiently extracts the brain from the skull.
Image restoration model with wavelet based fusionAlexander Decker
1. The document discusses various techniques for image restoration, which aims to recover a sharp original image from a degraded one using mathematical models of degradation and restoration.
2. It analyzes techniques like deconvolution using Lucy Richardson algorithm, Wiener filter, regularized filter, and blind image deconvolution on different image formats based on metrics like PSNR, MSE, and RMSE.
3. Previous studies have applied techniques like Wiener filtering, wavelet-based fusion, and iterative blind deconvolution for motion blur restoration and compared their performance.
This paper analyzed different haze removal methods. Haze causes trouble to
many computer graphics/vision applications as it reduces the visibility of the scene. Air light and
attenuation are two basic phenomena of haze. air light enhances the whiteness in scene and on
the other hand attenuation reduces the contrast. the colour and contrast of the scene is recovered
by haze removal techniques. many applications like object detection , surveillance, consumer
electronics etc. apply haze removal techniques. this paper widely focuses on the methods of
effectively eliminating haze from digital images. it also indicates the demerits of current
techniques.
IRJET - Contrast and Color Improvement based Haze Removal of Underwater Image...IRJET Journal
This document proposes a method for removing haze from underwater images using fusion techniques. It involves three main steps:
1. Removal of haze from the input underwater image using a water shield filter to extract a dehazed image.
2. Denoising the dehazed image using a sequential algorithm to compensate for uneven lighting and enhance image features.
3. Fusing the dehazed and denoised images to produce a clear output image with both haze and noise removed.
The method aims to improve underwater image visibility and contrast correction in a simple and effective manner. Evaluation on sample images demonstrates reduced haze and artifacts after processing.
International Journal of Computational Engineering Research (IJCER) is dedicated to protecting personal information and will make every reasonable effort to handle collected information appropriately. All information collected, as well as related requests, will be handled as carefully and efficiently as possible in accordance with IJCER standards for integrity and objectivity
Survey on Various Image Denoising TechniquesIRJET Journal
This document summarizes several techniques for image denoising. It begins by defining image noise and explaining how noise degrades image quality. It then reviews 7 different published techniques for image denoising, summarizing the key aspects of each technique. These include methods using local spectral component decomposition, SVD-based denoising, patch-based near-optimal denoising, LPG-PCA denoising, trivariate shrinkage filtering, SURE-LET denoising, and 3D transform-domain collaborative filtering. The document concludes that LSCD provides better denoising results according to PSNR analysis and provides an overview of the state-of-the-art in image denoising techniques.
An Enhanced Adaptive Wavelet Transform Image Inpainting TechniqueIRJET Journal
The document discusses an enhanced adaptive wavelet transform image inpainting technique. It begins with an abstract that describes image inpainting as recovering missing regions of an image through various techniques. It then provides background on image inpainting, including different categories and applications. The proposed approach uses wavelet transform methods to restore complex image structures with large curvature. Evaluation is based on patch size and peak signal-to-noise ratio (PSNR) value.
IRJET- A Comprehensive Study on Image Defogging TechniquesIRJET Journal
This document summarizes techniques for removing haze and other pollutants from images. It discusses using a dark channel prior method based on observations that at least one color channel has pixels with low values. Transmission maps and atmospheric light can be estimated using this dark channel prior. The document also discusses using depth estimation, wavelet-based techniques, enhancement-based techniques, filtering-based techniques, supervised learning-based techniques, fusion-based techniques, and meta-heuristic system-based techniques for haze removal. It provides an overview of these different haze removal techniques.
Inflammatory Conditions Mimicking Tumours In Calabar: A 30 Year Study (1978-2...IOSR Journals
1. The document discusses different image fusion techniques, specifically wavelet transform and curvelet transform based fusion.
2. Wavelet transform is commonly used for image fusion due to its simplicity and ability to preserve time-frequency details. Curvelet transform is better for fusing images with curved edges.
3. The paper compares fusion results of medical images like MR and CT using wavelet and curvelet transforms, finding that curvelet transform provides superior results in metrics like entropy and peak signal-to-noise ratio.
A Review of Image Contrast Enhancement TechniquesIRJET Journal
This document reviews several techniques for image contrast enhancement. It begins with an introduction to image enhancement and its goals of improving visual appearance and clarity. The paper then surveys key approaches for contrast enhancement including histogram equalization, discrete wavelet transform, and other spatial and frequency domain methods. Finally, the conclusion is that contrast enhancement using digital image processing continues to be an active area of research that can help solve problems across many fields involving image analysis.
This document compares the performance of image restoration techniques in the time and frequency domains. It proposes a new algorithm to denoise images corrupted by salt and pepper noise. The algorithm replaces noisy pixel values within a 3x3 window with a weighted median based on neighboring pixels. It applies filters like CLAHE, average, Wiener and median filtering before the proposed algorithm to further remove noise. Experimental results on test images show the proposed method achieves better noise removal compared to other techniques, with around a 60% increase in PSNR and 90% reduction in MSE. In conclusion, the proposed algorithm is effective at restoring images with high density salt and pepper noise.
IRJET- Texture Analysis and Fracture Identification of Bones X-Ray Images...IRJET Journal
This document presents a study on developing an image processing system for classifying bone fractures using X-ray images. The proposed system uses preprocessing, feature selection, feature extraction using GLCM, and classification with K-Means clustering and SVM. X-ray images of fractured and non-fractured bones are obtained, preprocessed to remove noise, and features are selected using DWT. GLCM is used to extract texture features like entropy, contrast and homogeneity. K-Means clustering groups similar features and SVM classifies images as fractured or non-fractured. The system achieves 90% accuracy in fracture detection and classification.
Progressive Image Denoising Through Hybrid Graph Laplacian Regularization: A ...john236zaq
The document discusses a proposed unified framework for progressively recovering images from corrupted observations through hybrid graph Laplacian regularization. The framework first constructs a multiscale representation of the target image using a Laplacian pyramid. It then progressively recovers the degraded image from coarse to fine scales, allowing for recovery of sharp edges and texture. Within each scale, a graph Laplacian regularization model is learned that minimizes error while preserving image structure. Between scales, the model is extended to a high-dimensional feature space to describe interscale correlations and propagate local structure regularity from coarser to finer scales. Experimental results on impulse noise removal demonstrate better performance than state-of-the-art algorithms.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
IRJET- Skin Cancer Detection using Local and Global Contrast StretchingIRJET Journal
This paper aims to identify efficient image enhancement techniques to detect skin cancer. It focuses on local and global contrast stretching techniques. The techniques enhance images by spreading out the range of pixel intensities to improve contrast. The paper proposes a method using edge detection, color detection, image segmentation, and lesion detection on input images. Various parameters are then calculated to determine if an image shows cancerous or non-cancerous properties. Local and global contrast stretching is shown to enhance images and help in skin cancer detection by calculating these diagnostic parameters.
IRJET- Digit Identification in Natural ImagesIRJET Journal
The document describes a technique to locate and recognize numbers in natural images. It involves preprocessing the image using Gaussian blur for smoothing, edge detection using Sobel or Canny operators, finding maximally stable extremal regions (MSER) to identify candidate objects, segmenting individual digits using vertical projection or contours, extracting features of each segmented digit, and classifying the digits using a technique like K-nearest neighbors. The technique aims to recognize numbers without requiring extensive training data, thus saving memory and computation time compared to traditional optical character recognition systems. Room for future improvement includes handling complex backgrounds better to make the approach more robust.
Restoration of Old Documents that Suffer from DegradationIRJET Journal
This document presents a new approach for restoring old documents that have suffered degradation. The approach proceeds in three steps: 1) Separating the foreground and background of the image using gamma correction and histogram stretching. 2) Further separating the foreground from remaining noise pixels. 3) Reconstructing the final restored image by combining the obtained foreground and background. Key aspects of the approach include extracting the background using mean and mode operations and removing uneven background colors, extracting the foreground by subtracting the background, and applying gamma correction and contrast stretching for enhancement. The approach aims to accurately restore degraded ancient documents affected by issues like scanning noise and aging effects.
A novel approach for efficient skull stripping using morphological reconstruc...eSAT Journals
This document presents a novel two-step approach for skull stripping of MRI brain images. The first step uses morphological reconstruction operations including erosion, opening by reconstruction, dilation, and opening-closing by reconstruction to generate a primary segmentation mask. The second step applies thresholding to the primary mask to extract the final skull-stripped brain image. The method is tested on axial PD and FLAIR MRI images and achieves high Jaccard and Dice similarity scores compared to manually stripped images, demonstrating its effectiveness at skull stripping.
An Efficient Approach of Segmentation and Blind Deconvolution in Image Restor...iosrjce
This paper introduces the concept of Blind Deconvolution for restoration of a digital image and
small segments of a single image that has been degraded due to some noise. Concept of Image Restoration is
used in various areas like in Robotics to take decision, Biomedical research for analysis of tissues, cells and
cellular constituents etc. Segmentation is used to divide an image into multiple meaningful regions. Concept of
segmentation is helpful for restoration of only selected portion of the image hence reduces the complexity of the
system by focusing only on those parts of the image that need to be restored. There exist so many techniques for
the restoration of a degraded image like Wiener filter, Regularized filter, Lucy Richardson algorithm etc. All
these techniques use prior knowledge of blur kernel for restoration process. In Blind Deconvolution technique
Blur kernel initially remains unknown. This paper uses Gaussian low pass filter to convolve an image. Gaussian
low pass filter minimize the problem of ringing effect. Ringing effect occurs in image when transition between
one point to another is not clearly defined. After removing these ringing effects from the restored image,
resultant image will be clear in visibility. The aim of this paper is to provide better algorithm that can be helpful
in removing unwanted features from the image and the quality of the image can be measured in terms of
PSNR(Peak Signal-to-Noise Ratio) and MSE(Mean Square error). Proposed Technique also works well with
Motion Blur.
MULTI WAVELET BASED IMAGE COMPRESSION FOR TELE MEDICAL APPLICATIONprj_publication
Analysis and compression of medical image is an important area of biomedical
engineering. Analysis of medical image and data compression are rapidly evolving field with
growing applications in the teleradiology, Bio-medical, tele-medicine and medical data
analysis. Wavelet based techniques are latest development in the field of medical image
compression. The ROI must be compressed by a Lossless or a near lossless compression
algorithm. Wavelet based techniques are most recent growth in the area of medical image
compression.
Wavelet multi-resolution decomposition of images has shown its efficiency in many
image processing areas and specifically in compression. Transformed coefficients are
obtained by expanding a signal on a wavelet basis. The transformed signal is a different
representation of the same underlying data. Such representation is efficient if a relevant part
of the original information is found in a relative small number of coefficients. In this sense,
wavelets are near optimal bases for a wide class of signals with some smoothness, which is
the reason for compression.
Keywords: Image compression, Integer Multiwavelet Transform.
1. INTRODUCTION
Image Compression is used to reduce the number of bits required to represent an
image or a video sequence. A Compression algorithm takes an input X and generates
compressed information that requires fewer bits. The Decompression algorithm reconstructs
the compressed information and gives the original.
A compression of medical image is an important area of biomedical and telemedici
This document summarizes a research paper that proposes a two-stage method for enhancing low quality fingerprint images. The first stage uses a ridge-compensation filter in the spatial domain to enhance ridge pixels and reduce non-ridge pixels. The second stage uses polar coordinates and separates filters into radial and angular domains. Local orientation and frequency are estimated based on learning from images. Frequency band pass filtering is then applied using the estimated local orientation and frequency maps. The two-stage approach enhances fingerprint images in both the spatial and frequency domains to improve low quality images.
Fuzzy Logic Based Decision System For PCB Defects CorrectionIJERA Editor
he size, ease of automation, increasing durability and reliability of any circuit being developed. Defect & errors while developments are much obvious. Detecting them is primary part but taking decision for correction of same in testing specimen will be effective or not is much more crucial. Sometimes defect correction in the PCB is much more efficient then reprinting, in terms of time, resource and cost with respect to production. Making decision manually is tiresome & less efficient. So in this paper a novel method of decision making system based on fuzzy logic is proposed which takes decision whether the testing specimen should undergo correction or reprinting. Fuzzy based system takes decision in the way humans do. Results shown for the proposed system are quite promising in decision making.
This document presents a novel two-step approach for skull stripping MRI brain images. The first step uses morphological reconstruction operations to generate a mask of the brain. The second step applies thresholding to the mask to extract the brain. The method was tested on axial PD and FLAIR MRI images. Results found Jaccard and Dice similarity scores above 0.8 and 0.9 respectively, indicating the method efficiently extracts the brain from the skull.
Image restoration model with wavelet based fusionAlexander Decker
1. The document discusses various techniques for image restoration, which aims to recover a sharp original image from a degraded one using mathematical models of degradation and restoration.
2. It analyzes techniques like deconvolution using Lucy Richardson algorithm, Wiener filter, regularized filter, and blind image deconvolution on different image formats based on metrics like PSNR, MSE, and RMSE.
3. Previous studies have applied techniques like Wiener filtering, wavelet-based fusion, and iterative blind deconvolution for motion blur restoration and compared their performance.
This paper analyzed different haze removal methods. Haze causes trouble to
many computer graphics/vision applications as it reduces the visibility of the scene. Air light and
attenuation are two basic phenomena of haze. air light enhances the whiteness in scene and on
the other hand attenuation reduces the contrast. the colour and contrast of the scene is recovered
by haze removal techniques. many applications like object detection , surveillance, consumer
electronics etc. apply haze removal techniques. this paper widely focuses on the methods of
effectively eliminating haze from digital images. it also indicates the demerits of current
techniques.
IRJET - Contrast and Color Improvement based Haze Removal of Underwater Image...IRJET Journal
This document proposes a method for removing haze from underwater images using fusion techniques. It involves three main steps:
1. Removal of haze from the input underwater image using a water shield filter to extract a dehazed image.
2. Denoising the dehazed image using a sequential algorithm to compensate for uneven lighting and enhance image features.
3. Fusing the dehazed and denoised images to produce a clear output image with both haze and noise removed.
The method aims to improve underwater image visibility and contrast correction in a simple and effective manner. Evaluation on sample images demonstrates reduced haze and artifacts after processing.
A Novel Dehazing Method for Color Accuracy and Contrast Enhancement Method fo...IRJET Journal
The document proposes a novel dehazing method for color accuracy and a contrast enhancement method for low light intensity images. The dehazing method involves three steps: 1) Region division based on white balance segmentation, 2) Estimation of local atmospheric light in each region, and 3) An iterative dehazing algorithm to remove haze from each region. The contrast enhancement method inverts the input image, applies the dehazing algorithm, and then inverts the dehazed image to produce an enhanced output. Experimental results show the proposed methods can effectively enhance images taken with mobile devices or cameras without color distortion.
A Novel Framework For Preprocessing Of Breast Ultra Sound Images By Combining...IRJET Journal
The document presents a novel framework for preprocessing breast ultrasound images that combines non-local means filtering and morphological operations. Non-local means filtering is used to reduce speckle noise, which is a significant issue for ultrasound images. Then morphological techniques are applied to enhance the noise-reduced images. The framework achieves peak signal-to-noise ratios of 60-80 decibels when tested on real breast ultrasound images. It provides an effective method for preprocessing ultrasound images to reduce noise and improve image quality.
High Efficiency Haze Removal Using Contextual Regularization AlgorithmIRJET Journal
This document presents a new contextual regularization algorithm for high efficiency haze removal. It begins with an overview of existing haze removal techniques and their limitations, such as halo effects and reduced image quality. It then proposes a method that estimates airlight using multiple transmission maps and cross bilateral filtering to remove noise and enhance edges. This integrated approach yields faster execution speeds and superior recovery effects compared to existing filters. The key contribution is a new contextual regularization that allows incorporating a filter bank into dehazing images. Experimental results show the proposed method removes haze without changing the original scene or producing saturated images, while existing techniques can remove wanted image information or produce unnatural results.
A new approach for generalised unsharp masking alogorithmeSAT Journals
Abstract We propose a new generalized algorithm using the exploratory data model as unified frame work. Enhancement of contrast and sharpness of an image is required in many applications. In applications like medical radiography enhancing movie features and observing the planets it is necessary to enhance the contrast and sharpness of an image. Unsharp masking is good tool for sharpness enhancement; it is an anti blurring filter. By using unsharp masking algorithm for sharpness enhancement, the resultant image suffering with two problems, first one is a hallo is appear around the edges of an image, and second one is rescaling process is needed for the resultant image. The aim of this paper is to enhance the contrast and sharpness of an image simultaneously and to solve the problems. In the proposed algorithm, we can adjust the two parameters controlling the contrast and sharpness to produce the desired output. The proposed algorithm is designed to address issues:1) simultaneously enhancing contrast and sharpness by means of individual treatment of the model component and the residual,2)reducing the halo effect by means of an edge-preserving filter using Bilateral filter. Experimental results, which comparable to recent published results, shows that proposed algorithm is able to significantly improve the sharpness and contrast of an image. This makes the proposed algorithm practically useful. Index Terms: Bilateral filter, edge-preserving filter, exploratory data model, Image Enhancement, Unsharp Masking
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
Feature Extraction of an Image by Using Adaptive Filtering and Morpological S...IOSR Journals
Abstract: For enhancing an image various enhancement schemes are used which includes gray scale manipulation, filtering and Histogram Equalization, Where Histogram equalization is one of the well known image enhancement technique. It became a popular technique for contrast enhancement because it is simple and effective. The basic idea of Histogram Equalization method is to remap the gray levels of an image. Here using morphological segmentation we can get the segmented image. Morphological reconstruction is used to segment the image. Comparative analysis of different enhancement and segmentation will be carried out. This comparison will be done on the basis of subjective and objective parameters. Subjective parameter is visual quality and objective parameters are Area, Perimeter, Min and Max intensity, Avg Voxel Intensity, Std Dev of Intensity, Eccentricity, Coefficient of skewness, Coefficient of Kurtosis, Median intensity, Mode intensity. Keywords: Histogram Equalization, Segmentation, Morphological Reconstruction .
X-Ray Image Enhancement using CLAHE MethodIRJET Journal
This document presents a method for enhancing X-ray images using Contrast Limited Adaptive Histogram Equalization (CLAHE). CLAHE improves local contrast and edge definition by applying histogram equalization separately to small regions of the image rather than the entire image. It prevents overamplification of noise that can occur with adaptive histogram equalization. The proposed method uses an image processing filter chain including noise reduction, high pass filtering, and CLAHE to enhance 2D X-ray images. Key parameters of the filter chain are optimized using an interior point algorithm. The goal is to provide customized tissue contrast for each treatment location to allow for accurate patient setup and analysis in radiation therapy. The CLAHE method is shown to effectively enhance contrast in X-
This document summarizes and compares four no-reference blur estimation methods: (1) a scale adaptive wavelet transform method, (2) a method using energy of quadrature filters, (3) a kurtosis measurement method using discrete dyadic wavelet transform, and (4) a method measuring average edge width. The methods are evaluated on blurred, noisy, and compressed images from a database. Results show the quadrature filter method performs best except for compressed images, where a perceptual method works best. The scale adaptive and kurtosis methods degrade more with noise while the quadrature filter method is more robust.
A survey on efficient no reference blur estimation methodseSAT Journals
Abstract Blur estimation in image processing has come to be of great importance in assessing the quality of images. This work presents a survey of no-reference blur estimation methods. A no-reference method is particularly useful, when the input image used for blur estimation does not have an available corresponding reference image. This paper provides a comparison of the methodologies of four no-reference blur estimation methods. The first method applies a scale adaptive technique of blur estimation to get better accuracy in the results. The second blur metric involves finding the energy using second order derivatives of an image using derivative pair of quadrature filters. The third blur metric is based on the kurtosis measurement in the discrete dyadic wavelet transform (DDWT) of the images. The fourth method of blur estimation is obtained by finding the ratio of sum of the edge widths of all the detected edges to the total number of edges. The results provided are useful in comparing the methods based on metrics like Spearman correlation coefficient. The results are obtained by evaluation on images from the Laboratory for Image and Video Engineering (LIVE) database. The various methods are evaluated on the images by adding varying content of noise. The performance is evaluated for 3 different categories namely Gaussian blur, motion blur and also JPEG2000 compressed images. Blur estimation finds its application in quality assessment, image fusion and auto-focusing in images. The sharpness of an image can also be found from the blur metric as sharpness is inversely proportional to blur. Sharpness metrics can also be combined with other metrics to measure overall quality of the image. Keywords: Blur estimation, blur, no-reference
Survey on Image Integration of Misaligned ImagesIRJET Journal
The document discusses methods for integrating misaligned images to improve image quality under low lighting conditions. It reviews previous works that combine images like flash/no-flash pairs to transfer details and color, but have limitations when images are misaligned. The paper proposes a new method using a long-exposure image and flash image that introduces a local linear model to transfer color while maintaining natural colors and high contrast, without deteriorating contrast for misaligned pairs. It concludes that handling misaligned images remains a challenge with existing methods and further work is needed.
Despeckling of Sar Image using Curvelet TransformIRJET Journal
This document presents a method for reducing speckle noise in synthetic aperture radar (SAR) images using the curvelet transform. SAR images are affected by speckle noise during image capture and transmission. The curvelet transform is used to decompose the SAR image into different scales and orientations. Thresholding is applied to the curvelet coefficients to remove coefficients corresponding to noise. The inverse curvelet transform is then applied to reconstruct the denoised image. Experimental results on SAR images show that the proposed curvelet-based method achieves higher peak signal-to-noise ratio and lower mean squared error than conventional filters, indicating it more effectively removes noise while preserving image detail.
An Application of Second Generation Wavelets for Image Denoising using Dual T...IDES Editor
The lifting scheme of the discrete wavelet transform
(DWT) is now quite well established as an efficient technique
for image denoising. The lifting scheme factorization of
biorthogonal filter banks is carried out with a linear-adaptive,
delay free and faster decomposition arithmetic. This adaptive
factorization is aimed to achieve a well transparent, more
generalized, complexity free fast decomposition process in
addition to preserve the features that an ordinary wavelet
decomposition process offers. This work is targeted to get
considerable reduction in computational complexity and power
required for decomposition. The hard striking demerits of
DWT structure viz., shift sensitivity and poor directionality
had already been proven to be washed out with an emergence
of dual tree complex wavelet (DT-CWT) structure. The well
versed features of DT-CWT and robust lifting scheme are
suitably combined to achieve an image denoising with prolific
rise in computational speed and directionality, also with a
desirable drop in computation time, power and complexity of
algorithm compared to all other techniques.
In the past two decades, the technique of image processing has made its way into every aspect of today’s tech-savvy society. Its applications encompass a wide variety of specialized disciplines including medical imaging, machine vision, remote sensing and astronomy. Personal images captured by various digital cameras can easily be manipulated by a variety of dedicated image processing algorithms. Image restoration can be described as an important part of image processing technique. The basic objective is to enhance the quality of an image by removing defects and make it look pleasing. The method used to carry out the project was MATLAB software. Mathematical algorithms were programmed and tested for the result to find the necessary output. In this project mathematical analysis was the basic core. Generally the spatial and frequency domain methods were both important and applicable in different technologies. This project has tried to show the comparison between spatial and frequency domain approaches and their advantages and disadvantages. This project also suggested that more research have to be done in many other image processing applications to show the importance of those methods.
IRJET- Spatial Clustering Method for Satellite Image SegmentationIRJET Journal
This document proposes a spatial clustering method for satellite image segmentation using neuro fuzzy logic c-means (NFLC). NFLC estimates the number of objects/samples in a satellite image based on texture, color, shape, size, and calculates the regions of roads, buildings and vegetation. It implements neighborhood weighting using self-organizing map (SOM) to calculate image clusters iteratively. Experimental results show NFLC obtains high edge accuracy compared to fuzzy local information c-means and can extract valuable information from satellite images without preprocessing.
Visual Quality for both Images and Display of Systems by Visual Enhancement u...IJMER
International Journal of Modern Engineering Research (IJMER) is Peer reviewed, online Journal. It serves as an international archival forum of scholarly research related to engineering and science education.
International Journal of Modern Engineering Research (IJMER) covers all the fields of engineering and science: Electrical Engineering, Mechanical Engineering, Civil Engineering, Chemical Engineering, Computer Engineering, Agricultural Engineering, Aerospace Engineering, Thermodynamics, Structural Engineering, Control Engineering, Robotics, Mechatronics, Fluid Mechanics, Nanotechnology, Simulators, Web-based Learning, Remote Laboratories, Engineering Design Methods, Education Research, Students' Satisfaction and Motivation, Global Projects, and Assessment…. And many more.
IRJET- Improving Interpretability of an Underwater using Undecimated Wavelet ...IRJET Journal
This document presents a method for improving the interpretability of underwater images using undecimated wavelet transform. It involves several steps: (1) performing histogram equalization on the underwater image to improve contrast, (2) using white balancing to enhance dark regions, and (3) fusing the outputs of steps 1 and 2 using undecimated wavelet transform. Undecimated wavelet transform is a type of stationary wavelet transform that avoids downsampling, improving shift invariance over discrete wavelet transform. The proposed method is compared to existing wavelength decomposition and image dehazing algorithms. Initial results show improvements in color correction and contrast after applying white balancing, histogram equalization, and image fusion with undecimated wavelet transform
IRJET- Enhanced Layer based Approach in Multi Focus Image Fusion SWT Algo...IRJET Journal
This paper proposes a new layer-based approach for multi-focus image fusion to address discrepancies between noisy and infrared images. The approach decomposes image pairs into base and detail layers. A local contrast-preserving method creates a new base layer for the infrared image with visual appearance similar to the denoised noisy image's base layer. Three types of detail layers are designed from the noisy and infrared images. An optimization framework estimates the noise-free detail layer using residual-based sparsity and patch redundancy priors. Experimental results show the approach overcomes discrepancy problems and provides high-quality fused images with low noise and sharp edges, outperforming conventional residual-based fusion in mitigating ringing artifacts.
Similar to IRJET- Image De-Blurring using Blind De-Convolution Algorithm (20)
TUNNELING IN HIMALAYAS WITH NATM METHOD: A SPECIAL REFERENCES TO SUNGAL TUNNE...IRJET Journal
1) The document discusses the Sungal Tunnel project in Jammu and Kashmir, India, which is being constructed using the New Austrian Tunneling Method (NATM).
2) NATM involves continuous monitoring during construction to adapt to changing ground conditions, and makes extensive use of shotcrete for temporary tunnel support.
3) The methodology section outlines the systematic geotechnical design process for tunnels according to Austrian guidelines, and describes the various steps of NATM tunnel construction including initial and secondary tunnel support.
STUDY THE EFFECT OF RESPONSE REDUCTION FACTOR ON RC FRAMED STRUCTUREIRJET Journal
This study examines the effect of response reduction factors (R factors) on reinforced concrete (RC) framed structures through nonlinear dynamic analysis. Three RC frame models with varying heights (4, 8, and 12 stories) were analyzed in ETABS software under different R factors ranging from 1 to 5. The results showed that displacement increased as the R factor decreased, indicating less linear behavior for lower R factors. Drift also decreased proportionally with increasing R factors from 1 to 5. Shear forces in the frames decreased with higher R factors. In general, R factors of 3 to 5 produced more satisfactory performance with less displacement and drift. The displacement variations between different building heights were consistent at different R factors. This study evaluated how R factors influence
A COMPARATIVE ANALYSIS OF RCC ELEMENT OF SLAB WITH STARK STEEL (HYSD STEEL) A...IRJET Journal
This study compares the use of Stark Steel and TMT Steel as reinforcement materials in a two-way reinforced concrete slab. Mechanical testing is conducted to determine the tensile strength, yield strength, and other properties of each material. A two-way slab design adhering to codes and standards is executed with both materials. The performance is analyzed in terms of deflection, stability under loads, and displacement. Cost analyses accounting for material, durability, maintenance, and life cycle costs are also conducted. The findings provide insights into the economic and structural implications of each material for reinforcement selection and recommendations on the most suitable material based on the analysis.
Effect of Camber and Angles of Attack on Airfoil CharacteristicsIRJET Journal
This document discusses a study analyzing the effect of camber, position of camber, and angle of attack on the aerodynamic characteristics of airfoils. Sixteen modified asymmetric NACA airfoils were analyzed using computational fluid dynamics (CFD) by varying the camber, camber position, and angle of attack. The results showed the relationship between these parameters and the lift coefficient, drag coefficient, and lift to drag ratio. This provides insight into how changes in airfoil geometry impact aerodynamic performance.
A Review on the Progress and Challenges of Aluminum-Based Metal Matrix Compos...IRJET Journal
This document reviews the progress and challenges of aluminum-based metal matrix composites (MMCs), focusing on their fabrication processes and applications. It discusses how various aluminum MMCs have been developed using reinforcements like borides, carbides, oxides, and nitrides to improve mechanical and wear properties. These composites have gained prominence for their lightweight, high-strength and corrosion resistance properties. The document also examines recent advancements in fabrication techniques for aluminum MMCs and their growing applications in industries such as aerospace and automotive. However, it notes that challenges remain around issues like improper mixing of reinforcements and reducing reinforcement agglomeration.
Dynamic Urban Transit Optimization: A Graph Neural Network Approach for Real-...IRJET Journal
This document discusses research on using graph neural networks (GNNs) for dynamic optimization of public transportation networks in real-time. GNNs represent transit networks as graphs with nodes as stops and edges as connections. The GNN model aims to optimize networks using real-time data on vehicle locations, arrival times, and passenger loads. This helps increase mobility, decrease traffic, and improve efficiency. The system continuously trains and infers to adapt to changing transit conditions, providing decision support tools. While research has focused on performance, more work is needed on security, socio-economic impacts, contextual generalization of models, continuous learning approaches, and effective real-time visualization.
Structural Analysis and Design of Multi-Storey Symmetric and Asymmetric Shape...IRJET Journal
This document summarizes a research project that aims to compare the structural performance of conventional slab and grid slab systems in multi-story buildings using ETABS software. The study will analyze both symmetric and asymmetric building models under various loading conditions. Parameters like deflections, moments, shears, and stresses will be examined to evaluate the structural effectiveness of each slab type. The results will provide insights into the comparative behavior of conventional and grid slabs to help engineers and architects select appropriate slab systems based on building layouts and design requirements.
A Review of “Seismic Response of RC Structures Having Plan and Vertical Irreg...IRJET Journal
This document summarizes and reviews a research paper on the seismic response of reinforced concrete (RC) structures with plan and vertical irregularities, with and without infill walls. It discusses how infill walls can improve or reduce the seismic performance of RC buildings, depending on factors like wall layout, height distribution, connection to the frame, and relative stiffness of walls and frames. The reviewed research paper analyzes the behavior of infill walls, effects of vertical irregularities, and seismic performance of high-rise structures under linear static and dynamic analysis. It studies response characteristics like story drift, deflection and shear. The document also provides literature on similar research investigating the effects of infill walls, soft stories, plan irregularities, and different
This document provides a review of machine learning techniques used in Advanced Driver Assistance Systems (ADAS). It begins with an abstract that summarizes key applications of machine learning in ADAS, including object detection, recognition, and decision-making. The introduction discusses the integration of machine learning in ADAS and how it is transforming vehicle safety. The literature review then examines several research papers on topics like lightweight deep learning models for object detection and lane detection models using image processing. It concludes by discussing challenges and opportunities in the field, such as improving algorithm robustness and adaptability.
Long Term Trend Analysis of Precipitation and Temperature for Asosa district,...IRJET Journal
The document analyzes temperature and precipitation trends in Asosa District, Benishangul Gumuz Region, Ethiopia from 1993 to 2022 based on data from the local meteorological station. The results show:
1) The average maximum and minimum annual temperatures have generally decreased over time, with maximum temperatures decreasing by a factor of -0.0341 and minimum by -0.0152.
2) Mann-Kendall tests found the decreasing temperature trends to be statistically significant for annual maximum temperatures but not for annual minimum temperatures.
3) Annual precipitation in Asosa District showed a statistically significant increasing trend.
The conclusions recommend development planners account for rising summer precipitation and declining temperatures in
P.E.B. Framed Structure Design and Analysis Using STAAD ProIRJET Journal
This document discusses the design and analysis of pre-engineered building (PEB) framed structures using STAAD Pro software. It provides an overview of PEBs, including that they are designed off-site with building trusses and beams produced in a factory. STAAD Pro is identified as a key tool for modeling, analyzing, and designing PEBs to ensure their performance and safety under various load scenarios. The document outlines modeling structural parts in STAAD Pro, evaluating structural reactions, assigning loads, and following international design codes and standards. In summary, STAAD Pro is used to design and analyze PEB framed structures to ensure safety and code compliance.
A Review on Innovative Fiber Integration for Enhanced Reinforcement of Concre...IRJET Journal
This document provides a review of research on innovative fiber integration methods for reinforcing concrete structures. It discusses studies that have explored using carbon fiber reinforced polymer (CFRP) composites with recycled plastic aggregates to develop more sustainable strengthening techniques. It also examines using ultra-high performance fiber reinforced concrete to improve shear strength in beams. Additional topics covered include the dynamic responses of FRP-strengthened beams under static and impact loads, and the performance of preloaded CFRP-strengthened fiber reinforced concrete beams. The review highlights the potential of fiber composites to enable more sustainable and resilient construction practices.
Survey Paper on Cloud-Based Secured Healthcare SystemIRJET Journal
This document summarizes a survey on securing patient healthcare data in cloud-based systems. It discusses using technologies like facial recognition, smart cards, and cloud computing combined with strong encryption to securely store patient data. The survey found that healthcare professionals believe digitizing patient records and storing them in a centralized cloud system would improve access during emergencies and enable more efficient care compared to paper-based systems. However, ensuring privacy and security of patient data is paramount as healthcare incorporates these digital technologies.
Review on studies and research on widening of existing concrete bridgesIRJET Journal
This document summarizes several studies that have been conducted on widening existing concrete bridges. It describes a study from China that examined load distribution factors for a bridge widened with composite steel-concrete girders. It also outlines challenges and solutions for widening a bridge in the UAE, including replacing bearings and stitching the new and existing structures. Additionally, it discusses two bridge widening projects in New Zealand that involved adding precast beams and stitching to connect structures. Finally, safety measures and challenges for strengthening a historic bridge in Switzerland under live traffic are presented.
React based fullstack edtech web applicationIRJET Journal
The document describes the architecture of an educational technology web application built using the MERN stack. It discusses the frontend developed with ReactJS, backend with NodeJS and ExpressJS, and MongoDB database. The frontend provides dynamic user interfaces, while the backend offers APIs for authentication, course management, and other functions. MongoDB enables flexible data storage. The architecture aims to provide a scalable, responsive platform for online learning.
A Comprehensive Review of Integrating IoT and Blockchain Technologies in the ...IRJET Journal
This paper proposes integrating Internet of Things (IoT) and blockchain technologies to help implement objectives of India's National Education Policy (NEP) in the education sector. The paper discusses how blockchain could be used for secure student data management, credential verification, and decentralized learning platforms. IoT devices could create smart classrooms, automate attendance tracking, and enable real-time monitoring. Blockchain would ensure integrity of exam processes and resource allocation, while smart contracts automate agreements. The paper argues this integration has potential to revolutionize education by making it more secure, transparent and efficient, in alignment with NEP goals. However, challenges like infrastructure needs, data privacy, and collaborative efforts are also discussed.
A REVIEW ON THE PERFORMANCE OF COCONUT FIBRE REINFORCED CONCRETE.IRJET Journal
This document provides a review of research on the performance of coconut fibre reinforced concrete. It summarizes several studies that tested different volume fractions and lengths of coconut fibres in concrete mixtures with varying compressive strengths. The studies found that coconut fibre improved properties like tensile strength, toughness, crack resistance, and spalling resistance compared to plain concrete. Volume fractions of 2-5% and fibre lengths of 20-50mm produced the best results. The document concludes that using a 4-5% volume fraction of coconut fibres 30-40mm in length with M30-M60 grade concrete would provide benefits based on previous research.
Optimizing Business Management Process Workflows: The Dynamic Influence of Mi...IRJET Journal
The document discusses optimizing business management processes through automation using Microsoft Power Automate and artificial intelligence. It provides an overview of Power Automate's key components and features for automating workflows across various apps and services. The document then presents several scenarios applying automation solutions to common business processes like data entry, monitoring, HR, finance, customer support, and more. It estimates the potential time and cost savings from implementing automation for each scenario. Finally, the conclusion emphasizes the transformative impact of AI and automation tools on business processes and the need for ongoing optimization.
Multistoried and Multi Bay Steel Building Frame by using Seismic DesignIRJET Journal
The document describes the seismic design of a G+5 steel building frame located in Roorkee, India according to Indian codes IS 1893-2002 and IS 800. The frame was analyzed using the equivalent static load method and response spectrum method, and its response in terms of displacements and shear forces were compared. Based on the analysis, the frame was designed as a seismic-resistant steel structure according to IS 800:2007. The software STAAD Pro was used for the analysis and design.
Cost Optimization of Construction Using Plastic Waste as a Sustainable Constr...IRJET Journal
This research paper explores using plastic waste as a sustainable and cost-effective construction material. The study focuses on manufacturing pavers and bricks using recycled plastic and partially replacing concrete with plastic alternatives. Initial results found that pavers and bricks made from recycled plastic demonstrate comparable strength and durability to traditional materials while providing environmental and cost benefits. Additionally, preliminary research indicates incorporating plastic waste as a partial concrete replacement significantly reduces construction costs without compromising structural integrity. The outcomes suggest adopting plastic waste in construction can address plastic pollution while optimizing costs, promoting more sustainable building practices.
Data Communication and Computer Networks Management System Project Report.pdfKamal Acharya
Networking is a telecommunications network that allows computers to exchange data. In
computer networks, networked computing devices pass data to each other along data
connections. Data is transferred in the form of packets. The connections between nodes are
established using either cable media or wireless media.
Better Builder Magazine brings together premium product manufactures and leading builders to create better differentiated homes and buildings that use less energy, save water and reduce our impact on the environment. The magazine is published four times a year.
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Sri Guru Hargobind Ji - Bandi Chor Guru.pdfBalvir Singh
Sri Guru Hargobind Ji (19 June 1595 - 3 March 1644) is revered as the Sixth Nanak.
• On 25 May 1606 Guru Arjan nominated his son Sri Hargobind Ji as his successor. Shortly
afterwards, Guru Arjan was arrested, tortured and killed by order of the Mogul Emperor
Jahangir.
• Guru Hargobind's succession ceremony took place on 24 June 1606. He was barely
eleven years old when he became 6th Guru.
• As ordered by Guru Arjan Dev Ji, he put on two swords, one indicated his spiritual
authority (PIRI) and the other, his temporal authority (MIRI). He thus for the first time
initiated military tradition in the Sikh faith to resist religious persecution, protect
people’s freedom and independence to practice religion by choice. He transformed
Sikhs to be Saints and Soldier.
• He had a long tenure as Guru, lasting 37 years, 9 months and 3 days
Particle Swarm Optimization–Long Short-Term Memory based Channel Estimation w...IJCNCJournal
Paper Title
Particle Swarm Optimization–Long Short-Term Memory based Channel Estimation with Hybrid Beam Forming Power Transfer in WSN-IoT Applications
Authors
Reginald Jude Sixtus J and Tamilarasi Muthu, Puducherry Technological University, India
Abstract
Non-Orthogonal Multiple Access (NOMA) helps to overcome various difficulties in future technology wireless communications. NOMA, when utilized with millimeter wave multiple-input multiple-output (MIMO) systems, channel estimation becomes extremely difficult. For reaping the benefits of the NOMA and mm-Wave combination, effective channel estimation is required. In this paper, we propose an enhanced particle swarm optimization based long short-term memory estimator network (PSOLSTMEstNet), which is a neural network model that can be employed to forecast the bandwidth required in the mm-Wave MIMO network. The prime advantage of the LSTM is that it has the capability of dynamically adapting to the functioning pattern of fluctuating channel state. The LSTM stage with adaptive coding and modulation enhances the BER.PSO algorithm is employed to optimize input weights of LSTM network. The modified algorithm splits the power by channel condition of every single user. Participants will be first sorted into distinct groups depending upon respective channel conditions, using a hybrid beamforming approach. The network characteristics are fine-estimated using PSO-LSTMEstNet after a rough approximation of channels parameters derived from the received data.
Keywords
Signal to Noise Ratio (SNR), Bit Error Rate (BER), mm-Wave, MIMO, NOMA, deep learning, optimization.
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