空间扩展目标对准误差图像的高分辨复原
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TP391.4

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国家高技术研究发展计划(863计划) , 四川省应用基础研究计划


HIGH RESOLUTION RESTORATION OF THE SPACE EXTENDED OBJECT IMAGES WITH COLLIMATE FAULT
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    摘要:

    大气湍流、光子噪声和光学跟踪系统对准误差严重降低了空间目标观测图像的分辨率.根据最大似然估计原理,建立了提高目标图像分辨率的多帧盲反卷积算法, 用共轭梯度优化方法从目标记录图像估计出原始目标函数和点扩散函数.运用低通平滑滤波技术在算法迭代过程中逐步完成对噪声的抑制.模拟实验数据和实际图像的复原结果表明,论文建立的盲反卷积算法有效地克服了大气湍流、光子噪声和光学系统对准误差,提高了目标图像的分辨率,复原目标图像的分辨率达到了光学衍射极限的水平.

    Abstract:

    The resolution of space object images was decreased seriously by the atmospheric turbulence, photon noise and collimating fault of optical track system. The muhiframe blind deconvolution algorithm for improving the resolution of object images based on the maximum-likelihood estimation was presented. From the record images the object function and point spread function were estimated by the conjugation gradient optimization method. The reduction of photon noise was reached by using the smoothing low-pass filter during the algorithm iteration. The restoration results of simulation and real data show that the proposed blind deconvolution algorithm can overcome the effects of the atmospheric turbulence, photon noise and collimating fault of optical system on object images, and improve the resolution of object images to arrive at the level of diffraction-limited.

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罗林,樊敏,王黎,沈忙作.空间扩展目标对准误差图像的高分辨复原[J].红外与毫米波学报,2007,26(5):372~376392]. LUO Lin, FAN Min, WANG Li, SHEN Mang-Zuo. HIGH RESOLUTION RESTORATION OF THE SPACE EXTENDED OBJECT IMAGES WITH COLLIMATE FAULT[J]. J. Infrared Millim. Waves,2007,26(5):372~376392.]

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  • 收稿日期:2006-12-21
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