Space Target Spceborne Visible Light Camera Imaging Simulation

Through the computer vision simulation technology and image processing technology can simulate the spaceborne optical camera to observe the spatial imaging process,generate simulation images.On the one hand,the simulation results can simulate the observation results in various observation environments and provide sufficient and flexible data source for the research of space target detection and tracking technology.On the other hand,the simulation technology can simulate the impact of the parameters of the observation system to observation performance,provide technical support for in-orbit camera design.This is of great significance to the study of spatial target observation,identification and tracking.Spaceborne Visible Light Camera Observation Space Targets Typical scenes contain space targets,observation cameras,star backgrounds and other objects.And geometric information describing the celestial bodies requires a uniform time system and coordinate system.Through the Euler angle or quaternion to represent the attitude of targets and observing satellite.After determining the relative position and posture of the celestial bodies,the visibility of the target is analyzed in conjunction with the camera parameters.According to the theory of computer graphics,real-time rendering of three-dimensional scene.The rapid calculation of the space cross section and the rapid rendering of the star background are realized by using the projection provided by OpenGL,the matrix stack structure and so on.The illumination object and the ray tracing algorithm are used to render the space target to realize the close observation and the surface target imaging simulation.And consider the algorithm to achieve the accelerated structure,improve the rendering efficiency of the simulation system.Radiation transfer of visible light is analyzed according to radiation theory.Calculate the irradiance of the sunlight reflected by the space object in the camera,and combine the camera’s physical parameters to quantify the pixel gray value of the target image.Combining the characteristics of Open GL rendering pipeline and the theory of radiation,we design the simulation system of space target visible light camera.Build precise 3D model with material properties by 3dsmax.Use STK to predict the observed target and the camera’s orbital parameters.And get parameters such as positions,magnitude and proper motions of stars from star catalog.Establish space-based visible light camera’s observing scene in OpenGL.The simulation system has a high degree of simulation and rendering speed which can achieve the real-time rendering of the deep space point target and near distance surface target’s imaging simulation.