光子学报, 2005, 34 (1): 114, 网络出版: 2006-06-12
相息图的变频采样研究
Study on the Kinoform of Frequency-change Sampling
摘要
根据相息图的成像原理及其局部空间频率不同的特点,对相息图进行变频率采样,保证相息图上位相在(0,2π)或是(-π,π)取值时量化为相同的等级数,从而消除了相息图采样点的计算、存贮及传输的冗余.并且采用邻近数值等值插值恢复即可获得良好的再现像质.实验和理论均证明了该方法的有效性和可行性,为相息图的快速计算、信息存贮与传输提出了一条新的思路.
Abstract
Based on the imaging theorem and different patial space-frequency characteristic of the kinoform , the kinoform has been sampled by frequency-change,ensuring that the same digitized grade should be taken in the phase difference from 0 to 2π or -π to π. In the way, the information redundancy of the kinoform that results from the sampling redundancy has been eliminated. Further more, a good reconstructed image can be acquired from restoration kinoform by the nearest interpolation. The feasibility and efficiency of the method are confirmed by theoretical analysis and experimental results. So a new thought has been offered for fast computation, the information storage and transmission of kinoform.
蔡晓鸥, 王辉, 李勇. 相息图的变频采样研究[J]. 光子学报, 2005, 34(1): 114. 蔡晓鸥, 王辉, 李勇. Study on the Kinoform of Frequency-change Sampling[J]. ACTA PHOTONICA SINICA, 2005, 34(1): 114.