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   Articles with "coherent noise" as a keyword



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Phase coherent noise reduction in digital holographic microscopy based on adaptive total variation

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recommendations! Published in 2020 at "Optics and Lasers in Engineering"

DOI: 10.1016/j.optlaseng.2020.106204

Abstract: Abstract Digital holographic microscopy is a new type of quantitative phase imaging tool. It offers non-contact and real-time phase contrast imaging and has been used widely; however, the coherent noise degrades the imaging quality seriously.… read more here.

Keywords: coherent noise; quality; phase; microscopy ... See more keywords

Attenuation of the Multiple Reflection-Refraction in 2-D Common-Shot Gather via Random-Derangement-Based FX Cadzow Filter

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recommendations! Published in 2022 at "IEEE Geoscience and Remote Sensing Letters"

DOI: 10.1109/lgrs.2021.3051620

Abstract: The attenuation of coherent noise plays a crucial role in reflection seismology but still poses some technical challenges. The multiple reflection–refraction (MRR) is one of the main coherent noises in land seismic surveys. The Cadzow… read more here.

Keywords: noise; reflection; coherent noise; cadzow filter ... See more keywords

Signal extraction using randomized-order multichannel singular spectrum analysis

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recommendations! Published in 2017 at "Geophysics"

DOI: 10.1190/geo2015-0708.1

Abstract: ABSTRACTMultichannel singular spectrum analysis (MSSA) is an effective algorithm for random noise attenuation; however, it cannot be used to suppress coherent noise. This limitation results from the fact that the conventional MSSA method cannot distinguish… read more here.

Keywords: coherent noise; spectrum; singular spectrum; randomized order ... See more keywords

Coherent noise suppression by learning and analyzing the morphology of the data

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recommendations! Published in 2017 at "Geophysics"

DOI: 10.1190/geo2017-0092.1

Abstract: ABSTRACTWe have developed a method for suppressing coherent noise from seismic data by using the morphological differences between the noise and the signal. This method consists of three steps: First, we applied a dictionary learning… read more here.

Keywords: coherent noise; morphology; noise suppression; noise ... See more keywords

Adaptive Dictionary Identification Framework and its Application to Sparsity-Optimized Harmonic Noise Separation

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recommendations! Published in 2024 at "GEOPHYSICS"

DOI: 10.1190/geo2024-0259.1

Abstract: Coherent noise separation stands as a critical step in seismic data processing. The Morphological Component Analysis (MCA)-based separation method, treating coherent noise and signal as distinct components and representing them sparsely with dictionaries, has found… read more here.

Keywords: noise separation; separation; sparsity; coherent noise ... See more keywords

Flyscan terahertz multi-plane lensless imaging with suppressed coherent noise.

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recommendations! Published in 2025 at "Optics express"

DOI: 10.1364/oe.545071

Abstract: Coherent lensless imaging usually suffers from coherent noise and twin-image artifacts. In the terahertz (THz) range, where wavelengths are 2 to 4 orders of magnitude longer than those in the visible spectrum, the coherent noise… read more here.

Keywords: lensless imaging; plane; coherent noise; multi plane ... See more keywords