Parallel field programmable gate array implementation of the sum of absolute differences algorithm used in the stereoscopic system

Stereo vision is a popular method for an artificial vision-based environment perception system used in various applications such as intelligent transportation. With two cameras, the disparity map calculated to find distance and depth of objects front moving vehicle. The key element stereoscopic based on sum absolute differences (SAD) algorithm, which most repeated operation stereo matching subsystem; however, this algorithm requires very intensive processing time, statistical analysis show that SAD block can consume more than 80% overall time algorithm. In paper we propose highly efficient hardware architecture real matching, proposed established by hierarchical parallel block, verified simulation successfully implemented Cyclone IV field programmable gate array (FPGA), it provides significant reduction performance imaging able achieve 30 frames per second 640×480 resolution color images.