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。
Based on the imaging theorem and different partial 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.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2005年第1期114-117,共4页
Acta Photonica Sinica
关键词
相息图
变频采样
空间频率
Kinoform
Frequency-change sampling
Spatial frequency
