Modeling the space-based optical imaging of complex space target based on the pixel method

This paper aims at the visible light imaging detection of complex space targets (satellites) at close range, utilizes the pixel method based on OpenGL and 3ds target model, studies the basic space-based optical imaging process, which includes the link elements such as space environment, solar radiation, target, optical receiver system, image detector and relative motion and so on. By using the pixel method and Bi-directional Reflectance Distribution Function (BRDF), this paper models the target's scattering of solar radiation and analyzes the energy response characteristics, the spatial frequency transfer characteristics and the noise mathematic model of each link. At last this paper introduces the complex target's space-based optical imaging simulation method based on 3D programming tool OpenGL and 3ds target models, and gives some examples of simulated images. This research can provide references for the next research thinking and methods of imaging system simulation and evaluation.