Rich Features and Precise Localization with Region Proposal Network for Object Detection

Abstract

Deep Network greatly accelerates the development of object detection. Recent advances in object detection are mainly attributed to the combination of deep network and region proposal methods [1, 2, 3]. However, the accuracy of object detection on the complicated datasets is still not satisfied, especially on small object detection. This is mainly because of the coarseness of the convolution feature maps. In this paper, we design a new strategy for generating region proposals and propose a new localization method for object detection. Compared with previous baseline detectors such as Fast R-CNN [4] and Faster R-CNN [5], Our method makes use of the adjacent-level feature maps at all scales to generate region proposals and also adopts the cascaded region proposal network (RPN) to fine-tune the location of the bounding box. Compared with other state-of-the-art methods, our method achieves the best recall and object detection accuracy.