The Research And Application Based On FPGA Of The GigE High Speed Image Acquisition And Processing System

With the rapid development of image processing technology in China,it has been widely used in industry,aerospace,radar monitoring,scientific research and other fields.At present,the design based on traditional PC,DSP and ASIC can not process image data in parallel,and the structure is complex.It is difficult to meet the needs of high-speed,real-time,reliable acquisition and transmission of high-pixel and high-frame-rate images in various fields.This paper combines the powerful parallel data processing ability of the FPGA and Long-distance and high-speed transmission characteristics of GigE(Gigabit Ethernet)and based on FPGA of image processing algorithm is added,based on FPGA of a GigE high-speed image acquisition and processing system is studied,high-speed image acquisition and real-time image processing are realized.The main contents and conclusions of this paper are as follows:1.Starting with the hardware design of GigE image acquisition and processing system based on FPGA,this paper designs the hardware circuit of image data acquisition and image processing system with FPGA as the main control chip and Gigabit Ethernet as the transmission medium,mainly including the main control circuit of FPGA and the peripheral circuit of FPGA.The circuit design of high-speed image acquisition,transmission,storage and display module is realized.2.In software design,using Verilog HDL language and top-down design idea,the logical timing control core of the system is designed,including the design of camera control mechanism at the acquisition end,the logical timing design of image data acquisition,the logical timing design of image transmission,the logical timing design of image storage and the logical timing design of image display,and so on.Logic timing is optimized and verified by simulation.3.The image data acquisition rate and frame loss rate are detected by Wireshark packet capture tool,the high-speed acquisition performance of the system is analyzed,and the results meet the design requirements.4.Combining linear filter and non-linear filter,the design of image algorithm of FPGA is carried out.Mean filter,median filter,Sobel edge detection and corrosion expansion algorithm are used to realize real-time extraction of image features in the image processing system of FPGA.5.Build a system test platform to test the overall performance of the system.And the image display software of PC is designed,which can input image database for different fields of images,and realize the comparison between the collected image and the target image.The research results show that the based on FPGA of GigE high-speed image acquisition and processing system can achieve high-speed image acquisition,storage and display;the highest acquisition rate is 156 fps for millions of pixels;the transmission rate and quality of image data are improved by optimizing the logic timing of the FPGA;and the high-speed extraction of image features is realized by optimizing the algorithm.At the same time,the system is applied to the field test of the pellet production line,and the high-speed image acquisition and defect detection of the pellet on the production line are realized.This research lays a theoretical and applied foundation for the development of high-speed image acquisition and processing technology in China.