Research On Embedded Infrared Image Processing System Based On DSP And FPGA

The infrared thermal image technology is invisible infrared radiation converted into visible image technology. With the development of infrared detector technology, infrared thermal image systems are widely used in all kinds of areas such as military, fire, electricity, construction, security, so the research of infrared image processing system has positive significance.The generated cause for the non-uniformity of infrared focal plane arrays image was analyzed; Aiming at the different processing requirements for infrared target, general procedure of infrared image processing was put forwarded; Aiming at the different stages of infrared image processing, variety of different infrared image processing algorithms were described.A set of embedded infrared image processing system, which is based on TI's high performance DSP (TMS320C6416) as the core processor and combined with FPGA (EP1C20F324C6) for the co-processing, is designed. The DSP is infrared image processing core task, and infrared image capture, infrared image pre-processing, video image display, control/status registers functional blocks are implemented. DSP and FPGA interface design takes advantage of means of the PDT transmission only high performance DSP having, which improves the rate of data transmission and saves the resources of DSP's EMIF. Hardware system adopts high speed PCB design technology such as eight layer board structure, the source impedance matching and signal package to ground which enhances the hardware system stability and signal integrity.In the CCS, the two-point non-uniformity correction algorithm is realized. The internal function modules of the FPGA have been divided, of which infrared image receiver and control function module is introduced strongly. In the QuartusII, program designs are completed using VHDL language and are simulated in software.The test for the actual two-point non-uniformity correction program in the embedded infrared image processing system based on DSP and FPGA is presented, using the infrared camera designed by COREI. The testing results show that the system basically reached the infrared image two-point non-uniformity correction and the hardware system can basically meet the characteristics of infrared image processing system such as the fast speed, the large amount data transfer and so on.