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Create Gabor filter or Gabor filter bank - MATLAB

    https://www.mathworks.com/help/images/ref/gabor.html
    A filter bank is a set of filters that represent combinations of multiple wavelengths, orientations, and other optional parameters. For example, if you specify two wavelengths and three orientations, then the Gabor filter bank consists of six filters for each combination of wavelength and orientation. To apply a Gabor filter or a Gabor filter ...

Understanding Gabor Filter - GitHub Pages

    http://kgeorge.github.io/2016/02/04/understanding-gabor-filter
    The complex 2D gabor filter kernel is given by g(x, y). In fig-5, we have plotted the function ge(x, y) = h(x, y). c(x, y). Note that in fig-3, fig-4 and fig-5, the 3d perspective views are slightly rotated to accentuate their features for viewing decipherability. Here is the octave code used for generating fig-5.

Robust CNN-Based Speech Recognition With Gabor Filter ...

    https://www.icsi.berkeley.edu/icsi/node/5331
    Robust CNN-Based Speech Recognition With Gabor Filter Kernels. As has been extensively shown, acoustic features for speech recognition can be learned from neural networks with multiple hidden layers. However, the learned transformations may not sufficiently generalize to test sets that have a significant mismatch to the training data.

Filter Bank: What is it? (DCT, Polyphase And More ...

    https://www.electrical4u.com/filter-bank/
    An analysis filter bank with M (M>1) filters is said to be a uniform DFT filter bank if all the filters are obtained from according to , where, 0<=k<=M-1. Here, is called a prototype filter. Note that, which means that the frequency response of is a uniformly shifted version of .

Gabor Filter Bank (2D) - File Exchange - MATLAB Central

    https://www.mathworks.com/matlabcentral/fileexchange/71348-gabor-filter-bank-2d
    Gabor Filter Bank (2D) A pair of functions for generating and filtering images using a bank of Gabor filters in the frequency domain. The filters are designed to overlap at their half maximum values and to scale the filter's wavelength by a factor of two starting at 4 pixels. See the example script for decomposition of a test image into its ...

Log-Gabor Filters - Peter Kovesi

    https://peterkovesi.com/matlabfns/PhaseCongruency/Docs/convexpl.html
    A Gabor, or log-Gabor, filter bank does not form an orthogonal basis set and hence there is no unique or ideal arrangement of the filters. Thus, the design of a filter bank is somewhat of an art but the following should give you some guidelines. One aim is to produce a filter bank that provides even coverage of the section of the spectrum that ...

The advantages of wavelets to FFT for audio analysis and ...

    https://ccrma.stanford.edu/~jos/mus423h/advantages_wavelets_FFT_audio.html
    I would like to discuss why Gabor wavelet has the definite advantage for an audio signal. 2. How to measure the performance of the filter bank To get a feature vector, filter bank output need to go through amplitude compression and DCT(dicrete cosine transform) to decorrelate the output.

Gabor filters - York University

    http://www.cs.yorku.ca/~kosta/CompVis_Notes/gabor_filters.pdf
    Gabor (Gabor, 1946) demonstrated that the complex Gabor filter given by, g(x) =g e(x)+ig o(x) = 1 √ 2πσ e− x 2 2σ2 cos(2πω 0x)+isin(2πω 0x) = 1 √ 2πσ e− x 2 2σ2 ei(2πω 0x) (5) attains the optimal (lower bound) compromise between the localization in the time and frequency domains; notice that the Gaussian function is an ...

Gabor filter - Wikipedia

    https://en.wikipedia.org/wiki/Gabor_filter
    In image processing, a Gabor filter, named after Dennis Gabor, is a linear filter used for texture analysis, which essentially means that it analyzes whether there is any specific frequency content in the image in specific directions in a localized region around the point or region of analysis. Frequency and orientation representations of Gabor filters are claimed by many contemporary …

NON-LINEAR DIMENSION REDUCTION OF GABOR FEATURES …

    http://www.seas.ucla.edu/spapl/paper/Gupta_ICASSP14.pdf
    A filter bank of 2-D Gabor filters can be applied to either the mel-spectrogram or power normalized spectro-gram to obtain a set of physiologically inspired Gabor Filter Bank Features. The high dimensionality and the correlated nature of …

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