Results 41 to 50 of about 1,689,718 (367)
Noise in laser speckle correlation and imaging techniques [PDF]
, 2010 We study the noise of the intensity variance and of the intensity correlation and structure functions measured in light scattering from a random medium in the case when these quantities are obtained by averaging over a finite number N of pixels of a ...
B. Weber +30 more
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IEEE Access, 2020 In recent years, many studies have examined filters for eliminating or reducing speckle noise, which is inherent to ultrasound images, in order to improve the metrological evaluation of their biomedical applications.
C. A. Duarte-Salazar +3 more
semanticscholar +1 more source
Deep Learning-Based Ultrasound Image Despeckling by Noise Model Estimation [PDF]
Iranian Journal of Electrical and Electronic Engineering, 2023 Speckle noise is an inherent artifact appearing in medical images that significantly lowers the quality and accuracy of diagnosis and treatment.
O. Mahmoudi Mehr +2 more
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Signal-to-noise ratio of the bispectral analysis of speckle interferometry [PDF]
, 1988 Monte Carlo simulations of an atmospheric phase screen, based on a Kolmogorov spectrum of phase fluctuations, were performed. Speckle patterns produced from the phase screens were used to derive statistical properties of power spectra and bispectra of ...
Nakajima, Tadashi
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Image Noise Removal in Ultrasound Breast Images Based on Hybrid Deep Learning Technique
Sensors, 2023 Rapid improvements in ultrasound imaging technology have made it much more useful for screening and diagnosing breast problems. Local-speckle-noise destruction in ultrasound breast images may impair image quality and impact observation and diagnosis.
Baiju Babu Vimala +6 more
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Speckle Noise Reduction in Sonar Image Based on Adaptive Redundant Dictionary
Journal of Marine Science and Engineering, 2020 As acoustic waves are affected by the channel characteristics, such as scattering and reverberation when propagating in water, sonar images often exhibit speckle noise which will cause visual quality of the image to decrease.
Yifan Huang, Wei-xiang Li, Fei Yuan
semanticscholar +1 more source
COMPARISON OF FILTERS DEDICATED TO SPECKLE SUPPRESSION IN SAR IMAGES [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016 This paper presents the results of research on the effectiveness of different filtering methods dedicated to speckle suppression in SAR images. The tests were performed on RadarSat-2 images and on an artificial image treated with simulated speckle noise.
P. Kupidura
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Statistical Region Based Segmentation of Ultrasound Images [PDF]
, 2008 Segmentation of ultrasound images is a challenging problem due to speckle, which corrupts the image and can result in weak or missing image boundaries, poor signal to noise ratio, and diminished contrast resolution.
Ayed +30 more
core +3 more sources
Normalized ghost imaging [PDF]
, 2012 We present an experimental comparison between different iterative ghost imaging algorithms. Our experimental setup utilizes a spatial light modulator for generating known random light fields to illuminate a partially-transmissive object.
Baoqing Sun +15 more
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Analysis of Edge Detection in Bar Code Symbols: An Overview and Open Problems
Journal of Applied Mathematics, 2012 Accurate edge localization is essential in bar code decoding. Since speckle noise is the most dominant form of noise in laser bar code scanners, it is important to fully understand its effects on edge detection.
Saša Krešić-Jurić
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