Do anyone know where to read about optimised gabor filters ? is optimised gabor filter a wavelet transform ?
Hello Gabor filters are used in many a
Apply Gabor filter or set of filters to 2-D image - MATLAB imgaborfilt
https://www.mathworks.com/help/images/ref/imgaborfilt.html
Traduire cette pageThis MATLAB function computes the magnitude and phase response of a Gabor filter for the input grayscale image A.Description · Examples · Input Arguments
Create Gabor filter or Gabor filter bank - MATLAB gabor - MathWorks
https://www.mathworks.com/help/images/ref/gabor.html
Traduire cette pageThis MATLAB function creates a Gabor filter with the specified wavelength (in pixels/cycle) and orientation (in degrees).Description · Examples · Input Arguments
Texture Segmentation Using Gabor Filters - MATLAB & Simulink
https://www.mathworks.com › ... › Texture Analysis
Traduire cette pageFrom experimentation, it is known that Gabor filters are a reasonable model of simple cells in the Mammalian vision system. Because of this, Gabor filters are ... pplications using signal processing
I propose to you to visit MAtlab you can find some programs using gabor filter in section: exchange files user
Here is good links:
The definition of a wavelet transform it that this is a function that provides orthonormal series that are square integrable. Gabor Filter decomposition is neither of these. So they are not "true" wavelets. However, they are optimisation algorithms that "try" to make Gabor-filters-like-wavelets, i.e. orthonormal and square integrable (that is that the frequency "space" to "tile" without gabs when "back reconstruct" the signal decomposed on Gabor filters, or wihtout "lost of infromation"). Gabor Banks are not able to provide decomposition of a signal that can be fully "restored" so they are not "true" wavelets but they are wavelets-like. Yes, you can find the funtion in Matlab, and also you can create your own and try to "optimise" it by modifiying the sigmas along the two orthogonal axes. You can also "try" to optimise it by using filter design technique but you have to apply "windowing" so there is no "contaminations" in frequency aspect.
Ok, but the filters that you have suggested are Pseudo Gabor filters, they are not "Gabor wavelets." You are optimising the search for the almost optimal scales selection and provide a criteria for "alignment" of pseudo gabor filters to a direction of the "star-like" formation in the image of possibly a diseased breast.
I hope that the following link can help:
Article Hybrid Discrete Wavelet Transform and Gabor Filter Banks Pro...
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