| 航摄系统调制传递函数(MTF)的测定及其应用 |
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| 引用本文： | 李莉华.航摄系统调制传递函数(MTF)的测定及其应用[J].武汉大学学报(信息科学版),1988(1). |
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| 作者姓名： | 李莉华 |
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| 摘 要： | 本文重点研究航摄系统调制传递函数(MTF)的测定及其应用,比较了两种滤波方法的作用,指出频率域滤波是行之有效的。在MTF应用方面,提出了以线扩散函数的等效宽度(EQW)作为像质评定的一个标准。试验表明,1/EQW与底片的目视分解力有着一定的近似关系。同时,对底片的复制质量也作了初步研究。
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| 关 键 词： | 调制传递函数 频率域滤波 刀刃扫描 底片分解力 等效宽度 复制质量 |
The Measurement and the Application of the Modulation Transfer Function (MTF) of the Photographic System |
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| Li Lihua.The Measurement and the Application of the Modulation Transfer Function (MTF) of the Photographic System[J].Geomatics and Information Science of Wuhan University,1988(1). |
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| Authors: | Li Lihua |
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| Abstract: | This paper puts emphasis on the measurement and the applications of MTF of the photographic system. Two filtering methods, i.e. the spatial domain filter and the speetral domain filter, have been compared and the result shows that the spectral domain filtering method is practical and effective. With regard to its, the paper proposes using the equivalent width of line spread function (EQW) as an image quality evaluating stan dard) the tests indicate that there is certainly similarity between 1/EQW and the resolution of the photograph. A tentative study of copy quality has also been made. |
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| Keywords: | modulation transfer function spectral domain filter odge trace resolution of photograph equivalent width copy quality |
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