MATLAB: I have to multiply 33 and 31 array. i am getting error using “curvatureqi=bsxfun(@times,q,curvature);” this is giving 33 matrix but i need 31 matrix in every layer or loop. please help

array multiplicationMATLABmatrix manupulation matrix multiplication

 q = [3*3] Matrix where q = q(:,:,1:20)
 curvature = [3*1] Matrix where curvature is single matrix.

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T = arrayfun(@(pane) q(:,:,pane) * curvature, 1 : size(q,3), 'Uniform', 0);
curvatureqi = cell2mat( reshape(T,1,1,size(q,3)) );

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MATLAB: 3*3 matched filter

Try this:

blurredImage = conv2(single(grayImage), ones(3)/9);
imshow(blurredImage, []);
% Find where the image was all 1's in a 3x3 box.
% The output image will be exactly 1 in that situation.
matchingRegions = abs(blurredImage - 1) < 0.0001;
% Use axes() or figure() to switch to a new axes if you want.
imshow(matchingRegions, []);

You might also want to look at normxcorr2(). I have a demo for that if you want it.

You need an outer double loop over rows and columns of the larger matrix, then inside that you need another double loop to go over the elements of your filter at a fixed location of the larger matrix. See attached code where I do a convolution "manually" with 4 for loops instead of using the conv2() function.

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