区域法立体匹配的实时性问题研究

PC based real-time implementation for regiond matching in stereo vision

立体匹配的一个关键问题是计算量大,实时性难以保证.作者从两个方面着手对立体匹配算法进行优化.首先是在算法结构上,应用盒滤波技术消除了冗余计算;其次在实现上,针对IntelPentium4处理器的特性,从存储器组织和高速缓存的利用,SSE2多媒体扩展指令的应用以及基于超线程技术的并行处理等三个方面进行优化实现.实验结果表明,所提出的算法在实时性上有了很大的提高.

The requirement of mass computation power was one of the main obstacles to the applications based on stereo matching. This paper tried to solve this problem in two ways. First, the computation redundancies were reduced using the box-filtering technique. Then further optimizations related to memory organization and cache efficiency, Streaming SIMD Instructions, and the parallel process using Hyper-threading technology have been efficiently implemented on Intel Pentium 4 based computer. The test result proves that the approach proposed in this paper can reduce the process time effectively.