Development Of Image Acquisition Monitoring And Communication Platform Based On DSP And FPGA

With the rapid development of high-speed electronic technology,the technologies of video and image acquisition have played an extremely important role in security and machine vision.The traditional technologies of image acquisition,monitoring and communication platforms used a single processor,which could basically meet the design requirements in the image acquisition.However,there are still deficiencies in the processing performance,such as the input video interface type,real-time image transmission,high-speed and high-resolution image transmission.The paper design a platform of image processing based on FPGA plus DSP,through the above analysis.This paper firstly compares and analyzes the advantages and disadvantages of the existing image processing platform architecture,then,it analyzes the performance difference of the image processing platform using different architectures and the development trend of image processing technology in different fields,and determines an image acquisition monitoring and transmission system based on DSP and FPGA.Combining the software and hardware resources of the platform and the software design scheme of each module,the paper introduces the specific implementation processing of the camera synthesis manager and the software star system in the platform.The image acquisition,processing,and transmission are described in the design of the camera synthesis manager system,the image acquisition part include the Camera Link camera configuration module,the Camera Link interface image acquisition module,the conversion of the image color space module,the DDR2 image cache module,and the image encoding output module for testing.Each module is separately programmed by Verilog programming and debugging,and all the modules of the camera synthesis manager system are combined to test,and the test results prove that the image acquisition module can meet the design requirements.The image processing and transmission parts are implemented on the DSP,which need to build an embedded development environment,write the video and image acquisition program by the V4L2 framework,and write the network interface drivers using the UDP protocol.Finally,all modules are tested and the image acquisition data is received on the LAN host in real time.In the implementation of the software star system,it is designed separately that the camera control module and the telemeter remote command receiving module.The camera control module implements the initial configuration and command configuration of the image sensor,and simultaneously decodes the received serial image data,video separation,and image integration to obtain the data format transmitted by the Camera Link interface.The telemeter remote command receiving module is designed according to the RS422 interface protocol standard,it is used to receive the instructions of the information processing platform,interpret the instructions,configure the image sensor,and return the reply instruction.Finally,the timing simulation test of each module meets the design requirements.In the development of the camera synthesis manager and software star system,it have the flexible logic design capability of the FPGA,which simplifies the design of the system's peripheral circuits and enhances the reliability and adaptability of the system.The multi-core DSP provide a rich set of peripheral interfaces while meeting the requirements of complex algorithms.