Binocular Stereo Vision Synchronous Acquisition Technique Based on FPGA

This paper proposes a coarse-to-fine two-level synchronous data acquisition and transmission system for binocular stereo vision, which satisfies strict synchronous requirement of stereo vision.Specifically,this synchronization system design contains: the hardware circuit design based coarse level and the hardware description language (HDL) design based fine level.The former includes synchronization clock design and external trigger synchronization design.The latter utilizes a multi-level synchronous control strategy from field-level to pixel-level synchronization,which consists of field-synchronous acquisition of the two-channel video inputs,two-channel Ping-pong buffers switch control module,and pixel-synchronous bit-splicing and PCI transmission module.The experiments of synchronous acquisition and display demonstrate the high reliability and great performance of this synchronous system.