The shadow by moving vehicle will lead inaccurate tracking in the video - based vehicle tracking system .Traditional shadow removal algorithm is with certain limitation and complexity ,and can not be applied to vehicle tracking system directly .In view of such limitation ,a shadow removal al‐gorithm based on gradient projection and Wavelet T ransform is raised .It firstly calculates the gradient value of target area with shadow ,then projects the gradient value horizontally ,and finally detects val‐id interval in the roof curve of projection ...
