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I am trying to pass a matrix to dct2 function but it is showing error. I am using matlab version R2012a. I have a matrix B which just used as argument like below
B = dct2(A);
disp(B);
Error is showing like this
Undefined function 'dct2' for input arguments of type 'uint8'.
Error in image_dct (line 24)
B = dct2(A);
You have to have the image processing toolkit in order to use that. Assuming you have that, then it should be just as simple as you listed.