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气象数据估计大气MTF的遥感影像恢复 总被引:1,自引:0,他引:1
本文针对受到大气模糊的中巴地球资源卫星二号星(CBERS-02)的遥感影像数据,提出一种利用卫星成像时刻气象参数估计大气MTF(MTF:Modulation Transform Function)的影像恢复算法.该方法利用遥感影像成像时刻的当地气象数据,首先对大气湍流MTF和气溶胶MTF进行估计,然后通过这两种MTF的简单乘积得到整个大气效应的调制传输函数,进而利用一种改进的迭代维纳滤波算法实现影像恢复.结果显示,恢复后影像的MTF曲线所覆盖的面积明显大于原始影像,进一步验证了本文算法的有效性和可行性. 相似文献
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随着人们对太空不断深人的探索,航空技术也在不断地成熟。航空摄影测量是人们探索太空的飞跃性体现,也是人们探索太空过程中的科技产物。近来,随着卫星遥感技术越来越多的在航空摄影测量中运用,卫星遥感影像也渐渐为人们所认知。高清晰的卫星遥感影像为航空摄影测量带来了不少变化和进步,也使航空摄影测量的技术日趋成熟,在本文中,我们就浅论了航空摄影测量中的卫星遥感影像。 相似文献
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《Journal of Modern Optics》2013,60(4):383-390
Direct photographic work over a large field (1°) at the prime focus of the classical Canada-France-Hawaii 3·6 m telescope has been achieved with very good image quality (less than 0·5 arcsec FWHM). The basic characteristics of the wide-field corrector (overall image quality, optical lay-out) based on an original design by Wynne are presented. Our Wynne corrector was in fact redesigned to have the last optical surface flat so that a transmission grating could be replicated thereon. There are three interchangeable last elements, those with gratings being wedged in proportion to the dispersion. This arrangement with only three optical elements locates the gratings at a maximum distance from the focal surface resulting in improved resolution over a 1° field, two times larger than that for the five element arrangement at KPNO. The CFH telescope grating-plus-lens, or ‘grens’ has a brightness limit which is fainter than the Palomar Sky Survey. 相似文献
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《Journal of Modern Optics》2013,60(7):517-528
A very simple method for evaluating hologram imagery in a general holographic arrangement with spherical or plane reference and reconstruction waves is proposed. For the hologram imagery approaching aberration-free case the relations providing new possibilities are introduced. The study is not restricted to plane holograms only but one can also study the imaging of objects reconstructed from volume holograms. 相似文献
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