arrays - MATLAB - Element-wise matrix multiplication using two different sizes matrices -

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i element-wise matrix multiplication using following 2x2x3 matrix in matlab

>> filter_1  filter_1(:,:,1) =       0     1      0     0   filter_1(:,:,2) =       1     0      0     1   filter_1(:,:,3) =       0     0      1     0

this matrix turn out 0 elements in matrix dimensions if used in element-wise multiplication. example, given 2x2x3 matrix:

>> frames_original{1}  ans(:,:,1) =     92   87    93   93   ans(:,:,2) =     69   66    72   71   ans(:,:,3) =     42   40    40   43

if element-wise matrix multiplication, let values remain in resulting matrix, others turn out zero:

>> filtered=double(frames_original{1}).*filter_1  filtered(:,:,1) =       0    87      0     0   filtered(:,:,2) =      69     0      0    71   filtered(:,:,3) =       0     0     40     0

however, works if both matrices of same size (2x2x3). now, suppose have big matrix, 1500x1500x3 matrix. how 'slide' 2x2x3 window performing element-wise multiplication dealing matrix borders accordingly? if using n-d convolution, doesn't work, matlab deals operation even-dimensional-window convolution, , want element-wise multiplication.

is there way element-wise matrix multiplication using 1 big matrix , smaller in matlab?

edit: solution element wise multiplication of matrices of differing dimensions doesn't work me because involves different element-wise multiplication , requires reshaping, don't want.

suppose frames_original , filter_1 differ @ first 2 dimensions, , can duplicate filter_1 match size of frames_original.

m1 = size(frames_original, 1) / size(filter_1, 1); m2 = size(frames_original, 2) / size(filter_1, 2); filter_2 = repmat(filter_1, [m1 m2 1]; % error if m1 m2 not integer filtered = double(frames_original{1}) .* filter_2;




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