Influence of recording parameters on particle field measurement by digital holographic microscopy：a numerical investigation

Zhou, Binwu; Wu, Xuecheng; Ying-Chun, Wu; Jing, Yang; Grhan, Grard; Cen, Kefa

doi:10.7498/aps.62.204203

Cited by 3 publications

(1 citation statement)

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“…[1] Most importantly, the quality of the reconstructed image can be improved by the digital image processing technology. Recently, digital holography is widely applied to particle tracking, [2] deformation measurement, [3,4] holographic microscopy, [5,6] biological cell monitoring, [7] ultrafast recording, [8] and so on. However, the speckle noise seriously affects the signal-to-noise ratio and spatial resolution of the reconstructed image, [9] and limits the application of digital holography.…”

Section: Introductionmentioning

confidence: 99%

Speckle reduction by selective spatial-domain mask in digital holography

Liang¹,

Chen²,

Hu³

et al. 2018

Chinese Phys. B

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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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