Intrinsic Image Based Moving Object Cast Shadow Removal in Image Sequences
Pankaj Kumar · 2011
The goal in this paper is to detect and remove shadows of moving objects in colour image sequences. The method works by deriving the shadow edges of a 3-band colour image, integrating edge information temporally in the image sequence, and subsequently removing these shadows by a method paralleling reflectance recovery by entropy minimisation. The method incorporates background subtraction information and extensive edge-linking morphology to detect superior shadow edges. This integration has greatly increased the scope of applicability and brought about significant enhancements in the recovered shadow-free images and the time of processing. Shadows in the frames of image sequences are shown to be significantly attenuated. At present the implementation runs about 4 frames per second and can serve as a good utility in improving the performance of high level algorithms in scene monitoring.