Apply 2D Gabor wavelet in Images

Hi I want to apply 2D Gabor filter on images at four orientations (0, 45, 90, 135 degrees). The output for every pixel should be like a vector [m0 m45 m90 m135], where m is the magnitude of orientation at that angle. Can anyone help me with the code?

Answer 1

[Naga]

Hello Asim,

Below is a sample code to apply 2D Gabor filters to an image at four orientations (0, 45, 90, and 135 degrees) and store the magnitudes in a vector for each pixel.

I = imread('sample.jpg');
I = rgb2gray(I);

% Define Gabor filter parameters
wavelength = 4; 
orientationAngles = [0, 45, 90, 135];
bandwidth = 1; 

[m, n] = size(I);
magnitudeMatrix = zeros(m, n, numel(orientationAngles));

% Apply Gabor filter at each orientation
for i = 1:numel(orientationAngles)
    gaborFilter = gabor(wavelength, orientationAngles(i), ...
                        'SpatialFrequencyBandwidth', bandwidth);
    magnitudeMatrix(:,:,i) = imgaborfilt(I, gaborFilter);
end

for i = 1:numel(orientationAngles)
    subplot(2, 2, i);
    imshow(magnitudeMatrix(:,:,i), []);
    title(['Orientation: ', num2str(orientationAngles(i)), '°']);
end