Scene Simulation And Implementation Of Dual-band Infrared Image

Infrared imaging technology has been widely used in military and civilian areas,including a variety of infrared guided weapons, infrared temperature measurements, andinfrared moisture measurements, etc. Due to the high cost and complicated producingprocess of the infrared imaging apparatus (e.g., to have good performance, the cores of theinfrared imagers need to work at minus273degrees), to obtain the characteristics of aninfrared target under various circumstances has been a difficult problem in the researchprocess of infrared imaging system. However, in practical applications, even thoughpouring in a large number of manpower and material resources, the resultant infraredimages are still difficult to meet the requirements of a various scenarios and weatherconditions. Therefore, the use of computer simulation technology of infrared images hasimportant theoretical significance and practical value. This paper mainly studies thesynthesis technology of dual-band infrared image scenes, produces dual-band infraredimage sequences required for scientific experiments, and builds and implements theinfrared image scene simulation system based on computer platform and “FPGA+DSP”PCI card combining hardware and software.The main works and innovative research results are as follows:(1) This paper proposes a method for dual-band infrared image scene generation andsynthesis. Firstly, according to infrared radiation and heat transfering theories for object’stemperature modeling, the temperature distribution is obtained combining the law oftemperature experience. Secondly, the radiation intensity is calculated through thetemperature distribution of target and then is corrected by atmospheric attenuation model.Finally, we quantify and synthesize dual-band infrared images, and achieve a variety ofhigh-precision dual-band infrared image simulation of complex scenes based on computerplatform, which builds the foundation for the realization of an infrared image simulationsystem.(2) In order to achieve the physical simulation system of dual-band infrared imagescene, the paper designs the dual-band infrared image scene simulation PCI hardwaresystem based on "FPGA+DSP" architecture. With Altera’s FPGA and TI’s DSP as the mainchips, the board builds the hardware platform of simulation system with PC. Among them,PC is mainly to achieve the dual-band infrared scene simulation, and PCI interface card is to realize the real-time output and acquisition of dual-band infrared scene at high frame rateby Camlink interface.(3) This paper constructs SOPC system with Nios II CPU soft-core as the center, andachieves the capture, playback, and displaying of dual-band infrared images in real time byFPGA, DSP and PC. In addition, in order to improve the quality of the infrared imagesimulation, it designs and implements the non-uniformity correction and superposition ofinfrared image in the FPGA. Finally, in order to facilitate remote controlling of the system,and communication of data and commands with other systems, it develops and implementsremote software updating and image communication control module based on HDLCprotocol in SOPC and DSP.