Aiming at problems of target extraction in complex background

mutual occlusion between two targets

target and background

processing of shadow

real-time and robustness of target tracking

and so on

in target tracking field

a moving target tracking algorithm based on double boundary limitation is proposed. The pyramid optical flow method is used to track target key points for a long time without model

and it is fused with the detected foreground key points without repetition. The scale factor and twiddle factor are evaluated

according to the key points obtained by fusion

and the target center points are probabilistically voted by using all the foreground key points. The double boundary definition method is used to make the key points on the boundary reliably describe the target and improve the robustness of the system.