分块的阴影检测方法：将每帧图像进行合理的分块,并且采用基于梯度的方法对运动区域边缘的小块进行合并。对每个小块根据阴影区域和对应的背景区域之间具有较强的结构相似性和色度近似性的特点进行阴影检测。

-The shadow of block detection method: The image of each frame block reasonable and based on the gradient method of movement of the edge of the small region under one roof. For each small region under the shadow of the background and the corresponding regions of the structure has a strong similarity and color similar to the characteristics of the shadow of detection.