Design Of Digital Image Mosaic System Based On FPGA

With the development of digital image display technology, People have anincreasingly strong demand for high-resolution images and large screen splicing. Butbecause of the current limits of the image acquisition front and the display technology,the requirement of people can not be achieve on a single display device. Using digitalimage processing technology, the problem can be solved through multiple imagemosaic way.Based on the present digital image mosaic status and trend in development, thispaper proposes a new architecture of digital image mosaic system. In this system, thedigital image mosaic implements plug-in backplane architecture design. The system isbased on FPGA array for digital image processing core. DDR2SDRAM with thelarge-capacity is used to complete the image cache. DVI codec modules are used tocomplete interface conversion function for the image data. And using SERDES tocomplete the image data serializer and deserializer to simplify the system internal datainterface. While taking use of the digital switch chips, to complete bridging andswitching function of the image data from the input to output. And build internalcommunication control system to accomplish the reliable control of each module,which based on the RS485bus.The focuses of this paper are image display interface conversion, imageprocessing implementation based on FPGA, and digital image exchange. In this paper,based on in-depth study of digital image stitching system works and the FPGAhardware logic design, and achieves abundant research results as follows：（1） This paper proposes a new architecture of digital image mosaic system，which based on FPGA. And the system implements plug-in backplanearchitecture design.（2） The system is based on FPGA array for digital image processing core,and using its powerful parallel data processing capabilities and flexible design features, to complete the cache of high-speed image, filtering,string and conversion processing.（3） DVI codec modules are used to complete interface conversion functionfor the image data.（4） Combination of the SERDES and digital switching technology, to achievea multiple of the input image mosaic display function, and simplify thesystem connection interface of the internal image data, and reduce thedifficulty of system design.（5） Based on the RS485bus control system design, including hardware andcommunications control protocol, making the whole system to normal,stable communication.