利用多尺度变换提高数字全息再现像质量  

Improving the Reconstructed Image Quality of the Digital Holography Through Multi-scale Transform

作　　者：王亮[1] 冯少彤[1] 聂守平[1] 黄飞[1] 

机构地区：[1]南京师范大学物理科学与技术学院,江苏省光电技术重点实验室,江苏南京210097

出　　处：《光电子．激光》2007年第5期625-628,共4页Journal of Optoelectronics·Laser

基　　金：江苏省自然科学基金资助项目(BK2006726);江苏省高校自然科学基金资助项目(05KJB140065;06KJB140062)

摘　　要：针对三维物体数字全息实验系统的特点,提出了基于多尺度变换的数字图像处理方法。利用小波变换和Curvelet变换的多尺度处理,成功滤除再现像中的零级衍射光斑,有效减小散斑噪声的影响并保留更多物像边缘信息,得到较高质量的数字全息再现像。实验结果表明,该方法具有较高实用性。A set of digital image processing algorithms based on multi-scale transform is proposed according to the characteristics of 3-D digital holography. By applying multi-scale principle of wavelet transform and curvelet transform,the zero-order diffraction spot is eliminated,and the speckle noise is reduced effectively while more edge information of object is maintained. As a result,the better quality image is obtained by combining the curvelet transform and digital holography. The experimental result shows that the method is practical and efficient.

关 键 词：数字全息 多尺度变换 小波变换 零级衍射光斑 CURVELET变换 散斑噪声 

分 类 号：TB877[一般工业技术—摄影技术] TN911.74[电子电信—通信与信息系统]