How to calculate gradient features of an image?
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My code is:
a = imread('C:\Users\DELL\Desktop\01_test.tif');
[Gx, Gy] = gradient(a);
[Gmag, Gdir] = gradient(Gx, Gy);
figure, imshow(Gmag, []), title('Gradient magnitude') figure, imshow(Gdir, []), title('Gradient direction') title('Gradient Magnitude (Gmag) and Gradient Direction (Gdir) using Sobel method') figure; imshowpair(Gx, Gy, 'montage'); axis off; title('Directional Gradients, Gx and Gy, using Sobel method')
error is:
??? Error using ==> rdivide Integers can only be combined with integers of the same class, or scalar doubles.
Error in ==> gradient at 75 g(2:n-1,:) = (f(3:n,:)-f(1:n-2,:))./h(:,ones(p,1));
1 commentaire
Guillaume
le 22 Oct 2014
Please use the {} Code button to format your code.
And what is your question exactly?
Réponses (2)
Guillaume
le 22 Oct 2014
You left out the important bit of the error, which is the one that told you on which line of your code the error occurred. I assume it's the
[Gmag, Gdir] = gradient(Gx, Gy);
10 commentaires
Munshida P
le 24 Août 2019
how to calculate average gradient of an image
6 commentaires
Walter Roberson
le 25 Août 2019
[Gmag, Gdir] = imgradient(YourGrayscaleImage, 'prewitt');
average_gradient = sum(double(Gmag(:))) ./ ((size(Gmag,1)-1) .* ((size(Gmag,2)-1).*sqrt(2));
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