Research And Development Of Large-capacity Image Information Distributed Processing Card

The development of embedded platform technology for scientific research andindustrial production has brought great convenience. It can be used to replace theindustrial PC systems in many areas. For example, in fabric defect detection, theoperating speed and real-time data collection, which using powerful image processingembedded platform, are comparable with traditional industrial PC systems. However,the production cost will be greatly reduced. So the research and development ofimage processing embedded systems have a practical significance.Based on the large amount of image information in the industrial production datafabric defect detection acquisition, image processing and high real-time requirements,it designs a large-capacity card, that distributed processing image informationembedded processing platform. The thesis completed the design, chip selectionprocessing platform, processing platform schematic circuit design, and PCB layoutand board level. Among them, the processing platform designed by the multi-blockDSP+FPGA motherboard architecture composed of sub-panels, the hardware circuitdesign work required for FPGA and DSP daughterboard motherboard designedseparately. For multi-block DSP FPGA motherboard and daughterboard connectedcommunication consisting of distributed image processing systems, it needs to designFPGA motherboard interface and DSP daughterboard interfaces. It discusses a varietyof interface design, which determined the FPGA motherboard led by the row homeFPGA chip, is not configurable I/O pins. DSP daughterboard pin leads by a DSPchip VPORT interface pins, and configure the FPGA and DSP VPORTcommunication module interfaces, and ultimately DSP FPGA motherboard anddaughterboard communication.In this paper, an image processing platform designed by AD9945conversion CCD image signal captured images converted after pretreatmentcan be sent to the DSP FPGA daughter board for further processing algorithm.Due to limited storage space inside the FPGA and DSP, in the face of large-capacity image information, the image data stream must be achievedthrough external expansion memory as a carrier,wherein, FPGA external expansion DDR2SDRAM, DSP SDRAM externalexpansion and FLASH. This paper describes the configuration and simulationwaveforms AD9945, DDR2SDRAM and FLASH. A paper FPGA chip module on themotherboard of the plurality of configuration sub-board DSP performs schedulingcontrol transmission of image data stream.Finally, through the design of fabric defects image processing algorithms on theplatform, it could verify the feasibility of the platform. Based on the realization offabric defect detection algorithms in DSP daughterboard, TI provides VLIB (picturevideo library) can simplify the algorithm design steps to improve the efficiency ofalgorithm development. After the processing results, it can be sent to the upper layerscheduling FPGA motherboard PC, thereby completing the design and debugging ofthe whole system.