一种高效的背景重建与更新算法研究*

作者：张S，曾虹，李二涛 日期：2008-08-18/span> 浏览：3764 查看PDF文档

一种高效的背景重建与更新算法研究*

张S，曾虹，李二涛
(杭州电子科技大学 计算机应用技术研究所，浙江 杭州 310018)

摘要：为了实时准确地重建出背景，提出了一种基于帧间差分的背景重建算法。该算法等间隔采样视频帧，然后对视频序列进行帧间差分，对得到的差分图像分块处理，通过比较各子块的亮度与能量均值，将各帧中满足要求的子块进行组合，从而快速地重建出背景。当背景发生整体或局部变化时，该算法能够快速地检测出背景变化，并采用相应算法实时更新背景。实验结果表明，该算法能快速、准确地重建出背景，从而能够完整地提取场景中的运动目标。
关键词：减背景法；背景重建与更新；帧间差分；亮度与能量均值；图像分块
中图分类号：P242.6+2文献标识码：A文章编号：1001-4551(2008)08-0011-04

Study of an efficient algorithm in background reconstruction and update
ZHANG Yun， ZENG Hong， LI Er-tao
(Institute of Computer Application Technology, Hangzhou Dianzi University, Hangzhou 310018, China)
Abstract: In order to reconstruct a background in real time and correctly, a background reconstruction algorithm based on difference between frames was proposed. In this algorithm, the video frames were picked up every few frames, then the retrived difference image of the adjacent frames was calculated, the difference image was divided into some sub-regions, with the average intensity and image energy as the constraints, the blocks which met the requirements of background were assembled together, so the background could be reconstructed fast in this way. When the background changed completely or partially, this algorithm could detect and update the change in real time with corresponding algorithm. Experimental results indicate that the background can be reconstructed fast and correctly in the proposed algorithm, so the moving objects can be extracted completely and successfully.
Key words: background subtraction; background reconstruction and update; difference between frames; average intensity and image energy; image division