The Key Technology Research And Implementation Of Infrared Imaging System

With the development of infrared focal plane array and infrared image processingalgorithms,infrared imaging system was more and more widely used in field of military andcivil.It is a kind of wave length convert technology which convert infrared radiation thathuman can not see into visible light.Image details were acquired by sensing the differencebetween radiation and emissivity of the target itself and then the infrared image details wasconverted into visible image.It has advantages in night vision,smoke penetrating and fogpenetrating.Right now,weapon of western countries was all equipped with infrared imagingsystem,we can say,infrared imaging technology has become the flag of a country’s armslevel. In addition, In the field of civil, infrared imaging technology has a wide range ofapplications in security, fire control, electric power, medical, architecture, remote sensing,etc.Therefore, the research on infrared imaging system will be of great value.The detector control and image acquisition and processing was realized upon thehardware platform on which FPGA(Field Programable Gate Array) was the main controllerand processor. Design schemes of infrared image acquisition card which is based on PCI-Express bus and targeted for high frame rate image acquisition was also put forward. Thereason why there is blind pixel was discussed,and then the blind pixel was detected andcompensated on FPGA.As is known to all,there is always non-uniformity in infraredimages.So how the non-uniformity engendered was also talked about,two-point correctionwas realized on FPGA after comparation of several non-uniformity algorithms. theprocessed infrared image was displayed on monitor in PAL model. For log-polar transformused in infrared image tracking algorithms, this paper model the algorithm in Simulinkbased on the look-up table method, use DSP Builder to realize the algorithm HDL fileconversion and simulate the algorithm in modelsim. Then the simulation results wereanalysised.Finally, in view of the high frame rate of the image acquisition, this paper putsforward three high frame rate image acquisition card design schemes based onPCI-Express bus.