用于像移探测的位平面匹配改进算法

Improved bit-plane matching algorithm for motion estimation

像移探测作为电子稳像的重要的步骤,直接影响稳像的精度和速度。针对传统位平面匹配算法的局限,对各阶位平面的探测效果进行了综合测试,并提出了一种改进方案,即对位平面4,5经过下采样后组成一个合成位平面来进行匹配。研究了匹配块大小变化对位平面算法的影响,比较了相邻帧和固定帧两种参考帧选取方法的优劣。实验表明,改进的位平面匹配算法提高了位平面算法的稳健性,在没有增加计算量的前提下,算法精度达到了与全搜索块匹配法相当的程度。

Motion estimation method is an important part of digital image stabilization processing.It directly influences accuracy and speed of digital image stabilization system.In view of limitations of conventional BPM(Bit-Plane Matching) algorithm,an improved BPM algorithm using a complex bit-plane combined by sub-sampled bit-plane 4,5 is proposed,and the relationship between matching block size and motion estimation accuracy is studied.A better selecting method of reference frame is acquired through comparison experiments.The results show that proposed algorithm can improve robust of bit-plane matching,and the algorithm accuracy is almost the same with FS-BMA.