Speckle noise reduction in digital holography by slightly shifting object

被引：0
|
作者：
Pan F. [1 ]
Xiao W. [1 ]
机构：
[1] School of Instrumentation Science and Optoelectronics Engineering, Beihang University
来源：
Zhongguo Jiguang/Chinese Journal of Lasers | 2011年 / 38卷 / SUPPL. 1期
关键词：
Aberration correction; Digital holography; Holography; Image registration; Speckle noise;
D O I：
10.3788/CJL201138.s109001
中图分类号：
学科分类号：
摘要：
As a coherent digital holographic imaging method, the speckles noise degrades the image quality. To solve this problem, a method to reduce speckle noise is proposed for digital holography. A series of digital holograms is obtained by shifting object slightly. Each hologram is reconstructed individually, while the differences between these retrieved complex amplitudes due to the object shifting are corrected with phase compensation and image registration algorithms. So all reconstructed complex amplitudes of object have same distribution, but uncorrelated coherent noise patterns. The speckle noise is well suppressed by averaging these reconstructed images. The theory and experimental results prove that the method is effective and feasible.
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页码：s109001 / 1
相关论文
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