Design Of Fpga-based Video Image Processing System

This paper mainly design hardware part of digital image processing.The design is a embedded application of image processing.The author read and analyse many information about image processing. For real time image processing ,this paper design a system of digtal image processing based on FPGA(Field Programmable Gate Array).Digital image processing consume a large amount of memory and time commonly.Basing on the advantage of FPGA,the paper design harware module by HDL(Hardware Language),i.e.,some function is achieved by LEs(Logic Element) of the FPGA.The real-time of digital image processing is achieved by this.The sample and display of digital image is the important part.So,the paper mainly design the sample and desplay module.The sample card is designed and it's word mode is configured according china's CVBS(Composite Video Bar Signal).For acquiring the image and storing it correctly to SRAM,the paper design the sample-control module.The sample module can work correctly using least time.The reliability and real-time achieve the reference.According the VGA principle and scheduling of the THS8134,the paper design a VGA-control module by HDL.Firstly, the control signal is synthesized Secondly,the horirontal and vertical synchronization signals is synthesized according to the VGA interface standard.By the experiment,the system can work reliably and the system is real-time.Several percent of the LEs of FPGA(EP1C20) is only consumed,so,other LEs can be used for more arithmetic.