关键词: 图像分块, 帧间差分, 背景减除, 背景提取

Abstract: In order to reduce the complexity of the background extraction algorithm in time and space, this paper presents a background extraction method which is combination of differential image block, background subtraction and frame difference method. Differential image block is classified. A sub-block classification method of statistics of pixel values is presented. Background to different types of  block with different update policy is updated. The algorithm is effective to solve the problem about the influence that the update process moving objects stay, background objects stay out. The experimental results show that the algorithm has the characteristics of fast operation and high robustness and it can extract real-time background accurately.

Key words: image block, frame-difference, background subtraction, background extraction