Sobel Operator : airspace is a differential operator, through its image sharpening. Image will block (8* 8), for the DCT and IDCT for : DCT is a separable Image Transform, used to image compression coding.

experiment4
...........\SOBEL.M
experiment5
...........\8 _dct.m
...........\DCT.M
...........\IDCT.M

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