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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 |
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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.
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Received: 30 March 2018
Revised: 21 May 2018
Accepted manuscript online:
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PACS:
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42.40.-i
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(Holography)
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42.30.-d
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(Imaging and optical processing)
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42.30.Ms
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(Speckle and moiré patterns)
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42.30.Wb
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(Image reconstruction; tomography)
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| 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
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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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