一种基于背景配准的光流场算法  

A Novel Optical Flow Algorithm Based on Background Registration

作　　者：卢宇[1] 祝豪[1] 吴钦章[1] 

机构地区：[1]中国科学院光电技术研究所

出　　处：《半导体光电》2008年第1期126-130,共5页Semiconductor Optoelectronics

摘　　要：研究了在摄像机动态的条件下,前后两帧图像间移动距离对光流法计算精度的影响。光流算法计算精度随着帧间中心位置偏移距离的增大而降低。针对此特点,提出了一种基于背景配准的光流计算方法。该方法使用背景配准计算帧间的近似偏移量,并以此近似偏移量为基础,进一步计算细节部分的相对偏移量。这种处理策略有助于为光流算法提供理想的工作区间并提高其计算精度;近似偏移量与细节光流场相叠加以合成最终的光流场。实验表明具有背景配准步骤的光流检测法较其他传统的光流算法相比,在精度方面具有较为明显的优越性。Analyzed is the influence on the precision of optical flow algorithms taken by the offset between the two frames. The precision declines with the increasing offset between the two frames. In this view, a novel optical flow detection solution based on background registration is proposed. This solution calculates the approximate offset between the two frames using background registration and further calculates the comparative optical flow based on the offset, which helps to ensure a good input for optical flow algorithm and improves the precision. The final optical flow filed is synthesized by the accumulation between approximate background offset and comparative motion vectors. Experimental results show the proposed solution has better performance in the precision than the classical solution without background registration.

关 键 词：背景配准 光流场 近似偏移 相对光流 合成 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]