摄像机自由运动环境下的背景建模  

Background Modeling under Free Moving Camera Environment

作　　者：金俣欣[1] 陶霖密[1] 徐光祐[1] 彭玉新[1] 

机构地区：[1]清华大学计算机科学与技术系,北京100084

出　　处：《中国图象图形学报》2008年第2期359-364,共6页Journal of Image and Graphics

基　　金：国家自然科学基金项目(60673189;60433030)

摘　　要：提出了在摄像机运动情况下使用多层Homography匹配算法进行背景建模的方法。该方法中,场景可以被看作由多个平面所组成,使用RANSAC方法找到场景中不同的平面,即多层Homography。每个像素点肯定在某个平面上,通过所属平面相应的Homography变换,就能使相邻两帧重叠视野中的像素点进行匹配,这样就能对场景进行背景建模。实验结果表明,该方法能有效地在摄像机运动环境中进行像素点级别的背景建模。In this paper a novel Multi-layer Homography algorithm for background modeling under free moving camera environment is proposed. Background is composed of many planes. RANSAC is used to find these different planes, called Multi- Layer Hmnography. Each pixel definitely belongs to certain plane. Transformed by the corresponding Homography, each pixel in each frame can find its match in the subsequent frame if it occurs in the shared view of these two frames. Thus, background model can be built. Experiment shows it is effective for background modeling under free moving camera environments.

关 键 词：HOMOGRAPHY 背景建模 对应点 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]