using imresize in the fourier domain
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x = rand(200,200);
y = imresize(x,2);
v1 = fftn(y);
v = fftn(x);
v2 = imresize(v,1/2) ./ 2;
My question is would v1 and v2 be the same matrix ? or am I using the fourier scaling theorem incorrectly ?
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Farhath Fatima
il 12 Feb 2020
Hi Raheem,
As per understanding, v1 and v2 would not be same matrix. First the sizes of both the matrices are not same. Size of v1 is 400*400 and size of v2 is 100*100.
v1 is obtained from y, which inturn is scaled to twice of size of x.
v2 is obtained from scaling v to ½ its size, which inturn is obtained from fourier of x.
First Scaling has to be proper to compare any two matrices.
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