This document summarizes research on using convolutional neural networks (CNNs) for scene image identification. It first discusses traditional object detection methods and their limitations. CNNs are presented as an improved approach, with convolutional, pooling and fully connected layers to extract features and classify images. Several popular CNN-based object detection algorithms are then summarized, including R-CNN, Fast R-CNN, Faster R-CNN and YOLO. The document concludes that CNN methods provide more accurate object identification compared to traditional algorithms due to their ability to learn from large datasets.