中国物理B ›› 2018, Vol. 27 ›› Issue (10): 104202-104202.doi: 10.1088/1674-1056/27/10/104202

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

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)   

  1. School of Physics and Opto-Electronic Engineering, Guangdong University of Technology, Guangzhou 510006, China
  • 收稿日期:2018-03-30 修回日期:2018-05-21 出版日期:2018-10-05 发布日期:2018-10-05
  • 通讯作者: Li Chen E-mail:ggchenli@gdut.edu.cn
  • 基金资助:

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

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)   

  1. School of Physics and Opto-Electronic Engineering, Guangdong University of Technology, Guangzhou 510006, China
  • Received:2018-03-30 Revised:2018-05-21 Online:2018-10-05 Published:2018-10-05
  • Contact: Li Chen E-mail:ggchenli@gdut.edu.cn
  • Supported by:

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

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摘要：

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.

关键词: digital holography, speckle reduction, spatial-domain mask

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.

Key words: digital holography, speckle reduction, spatial-domain mask

中图分类号:  (Holography)

  • 42.40.-i
42.30.-d (Imaging and optical processing) 42.30.Ms (Speckle and moiré patterns) 42.30.Wb (Image reconstruction; tomography)