Modeling And Simulation Of Space Target Infrared Imaging

Infrared imaging simulation technology is the field test technology based on the computer simulation of the infrared imaging system,and this technology make up for the a lot of manpower,material and financial resources spend in the field test to a certain extent.It is important for the shortening of infrared imaging system development cycle and the image processing algorithm research and the acquisition of infrared images under complex conditions.At present,the simulation of the space target scene mostly studies the radiation of the target itself,while ignoring the reflected radiation of the target against the sun and deep space background,and less research on the target simulation of the dual band,mostly in the target recognition.In this paper,we studied the dynamic infrared image generation technology of space target and the double band infrared image simulation combined with the infrared radiation theory of space targets in the deep space background and the computer graphics technology,based on the analysis of the existing infrared scene simulation method.This paper deeply studies the modeling and simulation technology of space targets in deep space background,and mainly completes the following work:(1)Derive the orbital data and attitude data of the spatial target in a specific time from the STK to calculate the position of the target in the orbit and the angle of the angle,and combine the thermal equilibrium theory to calculate the transient of the space target surface by the node network method temperature data. (2)According to the theory of computer graphics,a series of coordinate transformations are carried out.Combining with the infrared radiation model of the target,the infrared image of the output target is rendered,and the main function of the Open GL rendering engine is realized. (3)The effect model of the probe in the deep space is established by taking into account many factors which including the atmospheric attenuation effect,the aperture of the optical system of the camera,the optical transmittance and so on.Finally the energy distribution on the photoreceptor of the detector the gray image of the target.In this paper,we realized the process of spatial target infrared scene simulation,and create the conditions for the further image processing and fusion technology.