Speckle Suppression by Weighted Euclidean Distance Anisotropic Diffusion

Speckle reducing anisotropic diffusion

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 b...

Texture Suppression Preserving Edges by Anisotropic Diffusion

This article is devoted to a new method for removing texture in images using a smoothing rotating filter is presented. The novelty of this approach resides in the association of a descriptor able to classify a pixel as a texture pixel, a homogenous region pixel or an edge pixel with an anisotropic edge detector which defines two directions used in anisotropic diffusion. This anisotropic diffusi...

Fuzzy anisotropic diffusion for speckle filtering

An anisotropic diffusion filter contoled by fuzzy rules is presented. The proposed filter is based in the Perona-Malik technique, using a fuzzy reasoning to calculate de diffusion coefficient which controls the whole diffusion. The method has the advantage that it can be used for both smoothing and noise cleaning, as well as edge enhancement. This new aproach also allows ut to model the diffusi...

A Method for Defuzzication by Weighted Distance

Local Coherence based Fast Speckle Reducing Anisotropic Diffusion

1 Computer Science College, Sichuan University Abstract. In ultrasound image, because of the presence of speckle, the image contrast resolution is reduced. And the image speckle noise also limits the effective application of image processing and analysis methods such as edge detection and segmentation methods. In recent years, a class of new methods called anisotropic diffusion has been develop...