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Strategies for reducing speckle noise in digital holography [PDF]
Light: Science & Applications, 2018 AbstractDigital holography (DH) has emerged as one of the most effective coherent imaging technologies. The technological developments of digital sensors and optical elements have made DH the primary approach in several research fields, from quantitative phase imaging to optical metrology and 3D display technologies, to name a few.
Bianco Vittorio +8 more
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A Study of Speckle Noise Reduction Filters
Signal & Image Processing : An International Journal, 2015 Ultrasound images and SAR i.e. synthetic aperture radar images are usually corrupted because of speckle noise also called as granular noise. It is quite a tedious task to remove such noise and analyze those corrupted images. Till now many researchers worked to remove speckle noise using frequency domain methods, temporal methods, and adaptive methods ...
Jyoti Jaybhay, Rajveer Shastri
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Suppression of Speckle Noise in Digital Holography With Spatial and Temporal Domain Depolarization
IEEE Access, 2020 Speckle noise in digital holography has a great influence on image quality, and one of the reasons for the formation of speckle noise is that the degree of coherence for the reference light and the object light is too high and unnecessary noise is ...
Tongyao Du +4 more
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Speckle Noise and Dynamic Range in Coronagraphic Images [PDF]
The Astrophysical Journal, 2007 31 pages, 18 ...
Soummer, R. (Rémi) +3 more
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Physical pupil manipulation for speckle reduction in digital holographic microscopy
Heliyon, 2021 The reduction of speckle noise by physically changing the pupil of the imaging system, as first envisioned in optical holography, is experimentally applied to a digital holographic microscope (DHM).
Carlos Buitrago-Duque +1 more
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Speckle Reduction in Digital Holography by Fast Logistic Adaptive Non-Local Means Filtering
PhotonicsDigital holography is a promising imaging technology. However, there is speckle noise in the reconstructed image of a digital hologram. Speckle degrades the quality of the reconstructed image.
Yiping Fu, Junmin Leng, Zhenqi Xu
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Medical Image Denoising by Improved Kuan Filter
Advances in Electrical and Electronic Engineering, 2012 This paper focuses on the issue of speckle noise and its suppression. Firstly, the multiplicative speckle noise model and its mathematical formulation are introduced. Then, certain de-noising methods are described together with possible improvements.
Radek Benes, Kamil Riha
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Real Time Speckle Image De-Noising
CoRR, 2014 The paper presents real time speckle de-noising based on activity computation algorithm and wavelet transform. Speckles arise in an image when laser light is reflected from an illuminated surface. The process involves detection of speckles in an image by obtaining a number of frames of the same object under different illumination or angle and comparing
D.Sachin Kumar +3 more
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Quasi-Noise-Free and Detail-Preserved Digital Holographic Reconstruction
IEEE Access, 2019 The shortcoming of the coherence of digital holographic light sources leads to the generation of holographic reconstruction speckle noise, which seriously affects the quality of holographic reconstruction.
Ruyong Ren +4 more
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Optical Energy Variability Induced by Speckle: The Cases of MERLIN and CHARM-F IPDA Lidar
Atmosphere, 2019 In the context of the FrenchGerman space lidar mission MERLIN (MEthane Remote LIdar missioN) dedicated to the determination of the atmospheric methane content, an end-to-end mission simulator is being developed.
Vincent Cassé +4 more
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