The Research Of Space Target Image Restoration Based On Conjugate Gradient Method In Spatial Domain

In the process of space target detection, due to atmospheric turbulence, the random noise environment, the limitations of its own detection system and many other factors, the space target image is degraded severely. This would greatly limit the efficiency of the space taget monitoring system. So improving the image quality of space targets effectively is necessary.In order to solve the problem of space target image degradation, in this paper, a study of the following aspects is launched. The degradation model of space target image is described, the generation mechanism of atmospheric turbulence is described, the impact of imaging space target by atmospheric is analyzed, the point spread function is estimated roughly. It uses some classical image restoration algorithms to restore space target image, Focusing on the research of space target recovery algorithm which bases on spatial domain conjugate gradient method of the improved least squares. Simulation results indicate that the dependence is estimated by the point spread function of the algorithm for space target is not high, and good image restoration could be obtained by less number of iteration, and the solution of the algorithm has good convergence and stability.