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Write a Matlab function that takes a 2-d matrix (8bit gray-image) as a parameter, computes the 2D discrete cosine Transform for the input matrix, and

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Write a Matlab function that takes a 2-d matrix (8bit gray-image) as a parameter, computes the 2D discrete cosine Transform for the input matrix, and returns the output matrix (the transformed 2D matrix). The function should be included inside an M file. Hint: You should implement the 2D discrete cosine Transform from scratch. Do not call the matlab function dct2()

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