基于FPGA的稠密光流计算系统  

FPGA-based dense optical flow computing system

作　　者：马骏[1] 柴志雷[1] 王芝斌[1] 钟传杰[1] 

机构地区：[1]江南大学物联网工程学院轻工过程先进控制重点实验室(教育部),江苏无锡214122

出　　处：《计算机工程与应用》2016年第3期139-144,共6页Computer Engineering and Applications

基　　金：国家自然科学基金(No.61170121;No.61202312);高等学校学科创新引智计划(No.B12018)

摘　　要：高质量的稠密光流算法计算复杂度很高,因此计算速度成为制约其在实际系统中应用的重要原因。针对这一问题,利用现场可编程门阵列(FPGA)的细粒度并行特性,实现了一种高质量的稠密光流算法CBG(CombinedBrightness-Gradient)的硬件加速器。实验结果表明,在FPGA工作频率200 MHz,计算全部像素对应的光流信息的情况下,该系统处理分辨率为316×252的图像序列的帧频可达40 frame/s。High-quality algorithms for dense optical flow computation are computationally expensive, which limits their usability in real-world applications. In order to solve this problem, the hardware accelerator is applied for a high-quality dense optical flow algorithm by CBG （Combined-Brightness-Gradient） model, based on fine-grained parallelisms of FPGAs （Field Programmable Gate Arrays）. Experimental results show that 40 frame/s can be processed in time when the working frequency is 200 MHz and the image size is 316×252. Furthermore, optical flow fields for all pixels instead of selected areas are computed for designing.

关 键 词：光流计算 超松弛法 现场可编辑门阵列 并行计算 实时性 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]