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Regularized Speckle Reducing Anisotropic Diffusion for Feature Characterization
2006
2006 International Conference on Image Processing
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Speckle reducing anisotropic diffusion (SAR) is a partial differential equation-based method developed for this purpose. ...
For tissue characterization in medical ultrasound imagery or terrain characterization in synthetic aperture radar imagery, it is necessary to preprocess imagery to reduce granular, texture-alike noise ...
Speckle reducing anisotropic diffusion (SRAD) [12] has been emerged as a tool for reducing speckle with regional feature neatly enhanced. ...
doi:10.1109/icip.2006.312609
dblp:conf/icip/YuY06
fatcat:vf64c5zs5zcndl3mzff2rf22a4
Condensed anisotropic diffusion for speckle reducton and enhancement in ultrasonography
2012
EURASIP Journal on Image and Video Processing
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The regularization enables the correction of feature broadening distortion which is the common problem in second-order diffusion-based methods. ...
This article proposes a technique for speckle reduction in medical ultrasound (US) imaging which preserves the point and linear features with the added advantage of energy condensation regulator. ...
Jayakumar from Sarani clinic, Pudansandhai, Tamilnadu for their support and thoughtful comments. ...
doi:10.1186/1687-5281-2012-12
fatcat:bxvgsknjuvbebamtd4fyk56zom
Scatterer Density In Edge And Coherence Enhancing Nonlinear Anisotropic Diffusion For Medical Ultrasound Speckle Reduction
2007
Zenodo
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This paper proposes new enhancement models to the methods of nonlinear anisotropic diffusion to greatly reduce speckle and preserve image features in medical ultrasound images. ...
SDWNAD superior performances over nonlinear coherent diffusion (NCD), speckle reducing anisotropic diffusion (SRAD), adaptive weighted median filter (AWMF), wavelet shrinkage (WS), and wavelet shrinkage ...
Rushdi, PhD student at University of Miami, Computer Science Department for his assistance in the startup of Matlab implementation of the isotropic work. Dr. ...
doi:10.5281/zenodo.1072775
fatcat:ysdvq6mmlbcxpavn64l47opn5a
Nonlinear multiscale wavelet diffusion for speckle suppression and edge enhancement in ultrasound images
2006
IEEE Transactions on Medical Imaging
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This paper introduces a novel nonlinear multiscale wavelet diffusion method for ultrasound speckle suppression and edge enhancement. ...
Relying on this feature, both the envelope-detected speckle image and the log-compressed ultrasonic image can be directly processed by the algorithm without need for additional preprocessing. ...
ACKNOWLEDGMENT The authors would like to thank all of the anonymous reviewers for their suggestions. ...
doi:10.1109/tmi.2005.862737
pmid:16524086
fatcat:g62jniqlnjdspixwjyq32vqnyi
Weighted Non-Linear Diffusion Filtering with Wavelet Thresholding in Image Denoising
2013
International Journal of Computer Applications
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In the second phase of the proposed algorithm, anisotropic diffusion is applied on approximate coefficients. ...
The diffusivity function derived is applied depending on local image features and hence improve the capability of feature preservation along with noise removal. ...
T more effectively characterizes the local features of the image. Figure shows the local gray level variance over a 7×7 window. ...
doi:10.5120/13588-1318
fatcat:w3oq6qn7ozdcbj5wri6yjrdz7y
Optical Coherence Tomography (OCT) in Ophthalmology: Introduction
2009
Optics Express
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However, due to factors such as speckle noise, low image contrast, irregularly shaped morphological features such as retinal detachments, macular holes, and drusen, accurate segmentation of individual ...
shaped structural features in the OCT images. ...
Shakheel for assistance with the retinal images acquisition and data processing. ...
doi:10.1364/oe.17.003978
pmid:19259239
pmcid:PMC5542846
fatcat:xys4a3ic7vfnfjga7vcijjwune
Novelty Detection‐Based Internal Fingerprint Segmentation in Optical Coherence Tomography Images
[chapter]
2017
Computed Tomography - Advanced Applications
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Using a mixture of Gaussian's novelty detection routine on images pre-processed with a regularized anisotropic diffusion filter, the papillary contours-internal fingerprints-are consistent with those segmented ...
Speckle noise is first reduced using non-linear filters from the slices composing the 3-D image. Subsequently, the stratum corneum is used to extract the epidermis. ...
First, the slices are filtered by a regularized anisotropic diffusion filter to reduce the effects of speckle noise. ...
doi:10.5772/67594
fatcat:gzxfvf2itrcujbxg2be3rqmvzq
Intra-retinal layer segmentation in optical coherence tomography images
2009
Optics Express
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However, due to factors such as speckle noise, low image contrast, irregularly shaped morphological features such as retinal detachments, macular holes, and drusen, accurate segmentation of individual ...
shaped structural features in the OCT images. ...
Shakheel for assistance with the retinal images acquisition and data processing. ...
doi:10.1364/oe.17.023719
pmid:20052083
fatcat:mksups7j6ba6jkxpxdmbrcwtc4
Phase asymmetry guided adaptive fractional-order total variation and diffusion for feature-preserving ultrasound despeckling
[article]
2018
arXiv
pre-print
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It is essential for ultrasound despeckling to remove speckle noise while simultaneously preserving edge features for accurate diagnosis and analysis in many applications. ...
The experimental results show that our method outperforms other state-of-the-art ultrasound despeckling filters in both speckle reduction and feature preservation. ...
The authors would like to thank all the cited authors for providing the source codes used in this work and the anonymous reviewers for their valuable comments on this paper. ...
arXiv:1810.12538v1
fatcat:yisc3dbllfgivcj47y3puzwtja
MODIFIED NLM MODEL FOR DESPECKLING ULTRASOUND IMAGES USING FCM CLUSTERING BASED PRE CLASSIFICATION AND RIBM
2018
ICTACT Journal on Image and Video Processing
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Speckle noise is an inherent characteristic of ultrasound which reduces the classification accuracy of computer aided diagnosis (CAD) systems. ...
A modified non local means (NLM) filter for despeckling ultrasound images is proposed in this article. ...
Geertsma, MD, Head, Department of Radiology, Gelderse Vallei Hospital, Ede, Netherlands, for providing breast ultrasound images in various categories. ...
doi:10.21917/ijivp.2018.0240
fatcat:3xhzp47yh5cr7dzgj5gciagpfm
Scatterer Density In Nonlinear Diffusion For Speckle Reduction In Ultrasound Imaging: The Isotropic Case
2008
Zenodo
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Different diffusion parameters were tested and tuned to best reduce speckle noise and preserve edges. ...
This paper proposes a method for speckle reduction in medical ultrasound imaging while preserving the edges with the added advantages of adaptive noise filtering and speed. ...
Yu and Acton [34] have proposed a filtering scheme based on filters first described by Lee and Frost, called speckle reducing anisotropic diffusion (SRAD). ...
doi:10.5281/zenodo.1329512
fatcat:hotuos7dkbgnbmprvoidgnnnry
Anisotropic Diffusion Filter With Memory Based on Speckle Statistics for Ultrasound Images
2015
IEEE Transactions on Image Processing
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Most of the state-of-the-art filters try to reduce the speckle effect without considering its relevance for the characterization of tissue nature. ...
However, the speckle phenomenon is the inherent response of echo signals in tissues and can provide important features for clinical purposes. ...
Diffusion Filters for Speckle A entirely different paradigm about speckle filtering started with the application of anisotropic diffusion techniques in this field by Yu and Acton [27] . ...
doi:10.1109/tip.2014.2371244
pmid:25415987
fatcat:5bupztqyjbac5dta4wiibueipy
Subjective and objective evaluations of feature selected multi output filter for speckle reduction on ultrasound images
2018
Physics in Medicine and Biology
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Three radiologists with different years of experience, have subjectively evaluated the speckle reduction methods according to enhanced features. ...
The results of objective metrics and subjective evaluation showed that the proposed method reduces speckle and could help radiologists, according to their years of experience, in the diagnostic task. ...
, by introducing Speckle Reducing Anisotropic Diffusion filter (SRAD), applied anisotropic diffusion filter for the first time to speckle noise. ...
doi:10.1088/1361-6560/aadbc9
pmid:30129565
fatcat:hmi7eh4ypvgghgtrm7jzxh3qwm
Anderson Localization of Ultracold Atoms: Where is the Mobility Edge?
2017
Physical Review Letters
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2016 pre-print arXiv:1609.01065v1 fatcat:oke7k3slfrbmxaahod6lnnjsmm
The non-trivial effect of anisotropy in the spatial correlations of experimental speckle potentials have been put forward as a possible cause for such discrepancy. ...
experiments on non-interacting ultra-cold atoms in correlated disorder have yielded conflicting results regarding the so-called mobility edge, i.e. the energy threshold separating Anderson localized from diffusive ...
Pilati for sending us the raw data of Ref. 25 ...
doi:10.1103/physrevlett.118.170403
pmid:28498715
fatcat:cnztz5qw7rgv3jlwdzrzurzyiq
A Novel Method for Despeckling of Ultrasound Images Using Cellular Automata-Based Despeckling Filter
2021
International Journal of E-Health and Medical Communications (IJEHMC)
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In different approaches for reducing the speckle noise, there exists a class of filters that convert multiplicative noise into additive noise by using algorithmic functions. ...
Ultrasound images have an inherent property termed as speckle noise that is the outcome of interference between incident and reflected ultrasound waves which reduce image resolution and contrast and could ...
SRAD filter The Speckle Anisotropic Diffusion Filter performs de-speckling and maintains image edges without changing its valuable information. ...
doi:10.4018/ijehmc.20210901.oa2
fatcat:c4khvnugjved3ktvhou62lrqd4
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