Method and system for detecting shadow of moving object in surveillance video

The present invention belongs to the technical field of image processing, and provides a method for detecting a shadow of a moving object in a surveillance video. The method comprises: establishing a three-dimensional Gauss probability model of the shadow, and initializing parameters of the model; mapping every pixel in a moving foreground area into a three-primary-color ratio space of a moving foreground/video background; and distinguishing every obtained pixel in the moving foreground area according to the established three-dimensional Gauss probability model of the shadow, and detecting and differentiating shadow pixels and moving object pixels so as to obtain a shadow area by detection. The method and system disclosed by the invention well solve the problems that in existing surveillance videos, parameters in a moving object shadow detection technology are difficult to set and cannot be adaptive to scene illumination changes, and the computation burden is high and the like.