提出一种分块阴影检测算法，并描述了算法的实现，实验表明该算法克服了传统的边缘检测算法的缺点，阴影检测效果比传统算 法更好。 -A shadow detection algorithm block, and describes the algorithm, experiments show that the algorithm is to overcome the traditional shortcomings of the edge detection algorithm, shado