光学学报, 1984, 4 (9): 847, 网络出版: 2011-09-15
用π相位滤波实现图象对比度反转条件的分析
Condition analysis of image contrast reversal by using π phase filter
摘要
本文对用π相位滤波实现图象对比度反转的方法进行了理论分析和讨论.给出了通过在频谱面上对零频赋于e~(±iπ)相位因子,输出面可得到与物对比度相反的图象的条件,并用实验加以验证.从而为光学信息处理中使用π相位滤波提供了理论依据.
Abstract
A method of image contrast reversal by using π phase filter is theoretically analysed. Conditions for forming contrast reversal image in output plane by means of addition of phase factor e±iπ on zero frequency in frequency plane are discussed. Experimental results are given. This paper offers a theoretical base for using π phase filter in optical information processing.
康辉, 李正明, 李宝伦, 孙跃进. 用π相位滤波实现图象对比度反转条件的分析[J]. 光学学报, 1984, 4(9): 847. KANG HUI, LI ZHENGMING, Li BAOLUN, SUN YUEJIN. Condition analysis of image contrast reversal by using π phase filter[J]. Acta Optica Sinica, 1984, 4(9): 847.
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