Journal ArticleDOI
Speckle reducing anisotropic diffusion
Yongjian Yu,Scott T. Acton +1 more
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TLDR
This paper provides the derivation of speckle reducing anisotropic diffusion (SRAD), a diffusion method tailored to ultrasonic and radar imaging applications, and validates the new algorithm using both synthetic and real linear scan ultrasonic imagery of the carotid artery.Abstract:
This paper provides the derivation of speckle reducing anisotropic diffusion (SRAD), a diffusion method tailored to ultrasonic and radar imaging applications. SRAD is the edge-sensitive diffusion for speckled images, in the same way that conventional anisotropic diffusion is the edge-sensitive diffusion for images corrupted with additive noise. We first show that the Lee and Frost filters can be cast as partial differential equations, and then we derive SRAD by allowing edge-sensitive anisotropic diffusion within this context. Just as the Lee (1980, 1981, 1986) and Frost (1982) filters utilize the coefficient of variation in adaptive filtering, SRAD exploits the instantaneous coefficient of variation, which is shown to be a function of the local gradient magnitude and Laplacian operators. We validate the new algorithm using both synthetic and real linear scan ultrasonic imagery of the carotid artery. We also demonstrate the algorithm performance with real SAR data. The performance measures obtained by means of computer simulation of carotid artery images are compared with three existing speckle reduction schemes. In the presence of speckle noise, speckle reducing anisotropic diffusion excels over the traditional speckle removal filters and over the conventional anisotropic diffusion method in terms of mean preservation, variance reduction, and edge localization.read more
Citations
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A performance study of general-purpose applications on graphics processors using CUDA
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Automated 3-D Intraretinal Layer Segmentation of Macular Spectral-Domain Optical Coherence Tomography Images
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References
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Speckle Reduction In Medical Ultrasound Via Spatial Compounding
TL;DR: In this article, the correlation of speckle patterns as a function of aperture translation was measured for linear phased array pulse-echo ultrasonic imaging systems and the benefits of spatial compounding for a fixed aperture system discussed.
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Locally monotonic diffusion
TL;DR: Experimental results validate the claim that LOMO diffusion can produce denoised LomO signals with low error using less computation than the median-order statistic approach.
Proceedings ArticleDOI
A statistical model to describe invariants extracted from a 3-D quadric surface patch and its applications in region-based recognition
TL;DR: A statistical model, describing noise-disturbed invariants extracted from a surface patch of a range image, has been developed and applied to region based pose estimation and classification of 3D quadrics.