Rank: 601 based on 115 downloads (last 30 days) and 1 file submitted
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Gao Yang

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Nanyang Technological University

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17 Nov 2010 Screenshot Gabor filter Generates Gabor filters using bandwidth, aspect ratio, phase, wavelength and angle as parameters. Author: Gao Yang gabor filter, image processing, gabor filtergabor_exa... 115 7
  • 4.6
4.6 | 5 ratings
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11 Jan 2012 Gabor filter Generates Gabor filters using bandwidth, aspect ratio, phase, wavelength and angle as parameters. Author: Gao Yang Chalasani, Rakesh
22 Mar 2011 Gabor filter Generates Gabor filters using bandwidth, aspect ratio, phase, wavelength and angle as parameters. Author: Gao Yang Jason

Great one, thanks a lot. By the way, may I know, what does the size denote? Also, I can't seem to understand how the meshgrid in your code works.
02 Mar 2011 Gabor filter Generates Gabor filters using bandwidth, aspect ratio, phase, wavelength and angle as parameters. Author: Gao Yang shuai
02 Dec 2010 Gabor filter Generates Gabor filters using bandwidth, aspect ratio, phase, wavelength and angle as parameters. Author: Gao Yang Marc

Can someone explain me why when a bandwidth >1 is used the result differs from http://matlabserver.cs.rug.nl

using a bandwith of 10 I had to replace

    img_out_disp = sum(abs(img_out).^2, 3).^0.5;
with
    img_out_disp = sum(imag(img_out).^2, 3).^0.5;

in order to have the same results as http://matlabserver.cs.rug.nl

but don't know why. I believe this come from the ratio sigma to lamda < 0.5. Any mathematical explanation?

16 Nov 2010 Gabor filter Generates Gabor filters using bandwidth, aspect ratio, phase, wavelength and angle as parameters. Author: Gao Yang Rachel

Very good implementation. And good job normalizing it! What I do notice is: you seem to do (a+b).^2 to get the modulus of the result. I thought for a complex number a+bj, you are supposed to do a.^2+b.^2 for the modulus. Lucky enough for this case, the cross term 2ab is simply zero because we are summing some trigonometric functions from 0 to 2pi.

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gabor filter, image processing
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Updated   File Tags Downloads
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17 Nov 2010 Screenshot Gabor filter Generates Gabor filters using bandwidth, aspect ratio, phase, wavelength and angle as parameters. Author: Gao Yang gabor filter, image processing, gabor filtergabor_exa... 115 7
  • 4.6
4.6 | 5 ratings

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