摘要
提出了一种傅里叶计算全息图数字再现中混叠消除的方法。通过对傅里叶变换计算全息图再现过程的分析,在空域扩展待编码图像的范围,实现了数字图像的傅里叶Burch型计算全息图的制作。对编码的实值图像作逆傅里叶变换,可以准确地重建原图像。该编码方法解决了再现过程中图像混叠的问题,适用于对所有灰度图像的编码。实验结果表明,提出的编码方法可以得到清晰的再现图像。
A method of the elimination of aliasing image in the digital reoonstruction of Fourier CGH was presented. By analyzing the process of reoonstruction in Fourier CGH and expanding the space size of the original image, the Fourier-Butch＇ s CGH was produced. The original image was reconstructed exactly through the inverse Fourier transform to the coded image. It solved the problem of aliasing image and can is used in all gray images coding. Experiment results show that the transformed im- age is reoonstructed clearly.
出处
《光学技术》
EI
CAS
CSCD
北大核心
2007年第3期364-366,共3页
Optical Technique
基金
广东省自然科学基金项目(04010465)
关键词
计算全息
傅里叶变换
数字再现
混叠
computer generated hologram （CGH）
Fourier transform
alias
digital reconstruction
