摘要
通过对数字全息图光强信息的分析,介绍了光强相减法的原理,为了进一步改善再现像的质量,提出了将光强相减和灰度值变换相结合提高再现像质量的方法.实验对比了全息图的直接再现像、用光强相减法处理后的再现像、对全息图的灰度值进行变换后用光强相减法处理的再现像.实验表明,文中提出的方法有效地削弱了中央零级像的影响,提高了全息图的再现质量.
Based on the analysis of the light intensity of digital hologram and the principle of light intensity subtraction, a method combining light intensity subtraction and gray value trans- formation is proposed to improve the quality of reconstructed images of digital holography. From the comparison of quality of experimentally reconstructed images obtained by different methods such as the direct reconstructed image of hologram, the reconstructed image with light intensity subtraction, and the reconstructed image based on combination of light intensity subtraction and gray value transformation, it is shown that the proposed method could effectively weaken the ze- ro-order image, and improve the quality of reconstructed image.
作者
谷曼曼
GU Man-man(Department of Physics, College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China)
出处
《西安文理学院学报（自然科学版）》
2016年第6期12-16,共5页
Journal of Xi’an University(Natural Science Edition)
关键词
数字全息
光强相减法
灰度值变换
像质改善
digital holography
light intensity subtraction
transformation of gray value
imagequality improvement
