公开(公告)号：US09928426B1

公开(公告)日：2018-03-27

申请号：US15267875

申请日：2016-09-16

申请人： Hong Kong Applied Science and Technology Research Institute Company Limited

发明人： Hailiang Li ,  Zhi Bin Lei ,  Yang Liu ,  Man Yau Chiu ,  Kangheng Wu

IPC分类号： G06K9/46 ,  G06K9/00 ,  G06K9/32

CPC分类号： G06K9/00785 ,  G06K9/00771 ,  G06K9/325

摘要： A method for a vehicle management system with a perspective view camera generating perspective images of vehicles in a traffic direction, including performing an anti-perspective transform on the perspective images; separating each anti-perspective image into sub-images along one of a radial direction and a tangential direction relative to the traffic direction; determining a scale factor for each sub-image based upon measuring a scale of each vehicle at plural positions in one image using a frame difference method performing a scale transform for each sub-image using the corresponding scale factors for the sub-image; combining each of the scale transformed sub-images for each vehicle into corresponding enhanced anti-perspective images; performing vehicle detection for each vehicle based a combination of the enhanced anti-perspective images in which tracking is enhanced with an optimized detection box size range determined by the enhanced anti-perspective images; and performing vehicle tracking for each vehicle based on the combination of the enhanced anti-perspective images in which detecting is enhanced with the optimized detection box size range determined by the enhanced anti-perspective images.