一种改进的菱形搜索算法

摘要

The diamond search (DS) algorithm has been adopted by MPEG4 standard,and currently recognized as a better search algorithm.But the speed of DS algorithm is slow when the motion vector is small.The improved diamond search (IDS) algorithm is presented.Rough location and enhanced halfway-stop operation are added to it.Lots of vehicle tracking experiments show that the IDS algorithm improves the search speed on the basic of ensuring the search performance,supplying more effective technique support for template matching.Moreover,contrastive experiments prove the algorithm is insensitive to mutational trajectory.%DS (Diamond Search,DS)算法曾被MPEG4标准采用,是目前公认的一种较好的搜索算法.但当运动矢量较小时,菱形搜索算法速度较慢.提出了一种改进的菱形搜索(Improved Diamond Search,IDS)算法,加入了粗定位和强化的半路停止操作.大量的车辆跟踪实验表明,IDS算法在保证搜索性能的基础上增加了搜索速度,为模板匹配提供了更加有效的技术支持.更有对比实验揭示了该算法对轨迹突变的不敏感性.