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Fast Non-Local Means 1D, 2D Color and 3D 1.0

  Date Added: July 19, 2013  |  Visits: 234

Fast Non-Local Means 1D, 2D Color and 3D

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This function NLMF performs Non-Local Means noise filtering of 1D signal, 2D grey/color or 3D image data. The function is partly c-coded for cpu efficient filtering. Suitable for almost every image data type such as MRI, CT and normal photos.Warning !, Image filtering removes noise, but important (medical) details can also be lost, (see discussion in comments). Principle NL-Mean filter: A local pixel region (patch) around a pixel is compared to patches of pixels in the neighbourhood (or in the whole image). The centerpixels of the patches are averaged depending on the quadratic pixel distance between the patches. Function: J = NLMF( I, Options); inputs, I : 1D signal, 2D grey/color or 3D image data, of type Single or Double in range [0..1] Options : Struct with options, such as filtering strength outputs, J : The NL-means filtered image or image volume Function(2): J = NLMF2Dtree(I, Options);Same as NLMF but will search for the best matches in the whole 2D images using a kd-tree (is still extremely slow)Literature:- Non local filter proposed for A. Buades, B. Coll and J.M. Morel "A non-local algorithm for image denoising"- Basic Matlab implementation of Jose Vicente Manjon-Herrera

Requirements: No special requirements
Platforms: Matlab
Keyword: Filtered Function Nlmeans Nlmf Dtreei Options Outputs Range Strength Struct Volume
Users rating: 0/10

License: Shareware Size: 30.72 KB
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