关键词: 目标跟踪, 帧差法, 光流法, 区域光流检测

Abstract: An improved optical flow estimation algorithm based on the frame difference is proposed, which is used for detecting the moving target. In the first part, the discontinuous frame difference is applied to detecting the moving target with the inter-frame displacement smaller than one pixel and accumulated displacement bigger than one pixel. In the second part, the General Dynamic Image Model（GDIM） is introduced to form a new optical constraint equation, which has overcome the problem that the equation is not tenable. Only not zero pixels are calculated by using the optical flow method. As a result, accuracy and speed of the target detection are improved.The effectiveness of the proposed method is verified by the simulation results.

Key words: target tracking, frame difference, optical flow, local optical flow