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Chin. Phys. B, 2018, Vol. 27(10): 104202    DOI: 10.1088/1674-1056/27/10/104202
ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next  

Speckle reduction by selective spatial-domain mask in digital holography

Ming-Da Liang(梁明大), Li Chen(陈丽), Yi-Hua Hu(胡义华), Wei-Tao Lin(林伟涛), Yong-Hao Chen(陈永昊)
School of Physics and Opto-Electronic Engineering, Guangdong University of Technology, Guangzhou 510006, China
Abstract  

An improved method of using a selective spatial-domain mask to reduce speckle noise in digital holography is proposed. The sub-holograms are obtained from the original hologram filtered by the binary masks including a shifting aperture for being reconstructed. Normally, the speckle patterns of these sub-reconstructed images are different. The speckle intensity of the final reconstructed image is suppressed by averaging the favorable sub-reconstructed images which are selected based on the most optimal pixel intensity sub-range in the sub-holograms. Compared with the conventional spatial-domain mask method, the proposed method not only reduces the speckle noise more effectively with fewer sub-reconstructed images, but also reduces the redundant information used in the reconstruction process.

Keywords:  digital holography      speckle reduction      spatial-domain mask  
Received:  30 March 2018      Revised:  21 May 2018      Accepted manuscript online: 
PACS:  42.40.-i (Holography)  
  42.30.-d (Imaging and optical processing)  
  42.30.Ms (Speckle and moiré patterns)  
  42.30.Wb (Image reconstruction; tomography)  
Fund: 

Project supported by Guangdong Provincial Science and Technology Plan Project of China (Grant Nos. 2015B010114007 and 2014B050505020).

Corresponding Authors:  Li Chen     E-mail:  ggchenli@gdut.edu.cn

Cite this article: 

Ming-Da Liang(梁明大), Li Chen(陈丽), Yi-Hua Hu(胡义华), Wei-Tao Lin(林伟涛), Yong-Hao Chen(陈永昊) Speckle reduction by selective spatial-domain mask in digital holography 2018 Chin. Phys. B 27 104202

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