东南大学学报（英文版）2009，Vol.25Issue(1)：113-116,4.
一种去除数字全息零级像的新方法
Method for eliminating zero-order image in digital holography
摘要
Abstract
For eliminating the zero-order image in digital holography,a new method using the differential of the hologram intensity instead of the hologram itself for numerical reconstruction is proposed.This metllOd is based on digital image processing.By analyzing the spatial spectrum of the off-axis digital hologram,it theoretically proves that the zero-order image can be effectively eliminated bv differential before reconstruction.Then,the detected hologram is processed in the program with differential and reconstruction.Both the theoretical analysis and digital reconstruction results show that it can effectively eliminate the large bright spot in the center of the reconstructed image caused by the zero-order image,improve the image quality significantly,and render a better contrast of the reconstructed image.This method is very simple and convenient due to no superfluous optical elements and requiring only one time record.关键词
数字全息/零级像/数字图像处理/菲涅尔积分Key words
digital holography/zero-order image/digital image processing/Fresnel integral分类
数理科学引用本文复制引用
刘雯雯,康新,戴宜全,何小元..一种去除数字全息零级像的新方法[J].东南大学学报（英文版）,2009,25(1):113-116,4.基金项目
The Natural Science Foundation of Jiangsu Province (No.BK2006102).the National Natural Science Foundation of China(No.10772086). （No.BK2006102）
