Image Compression Using the Discrete Cosine Transform

The inverse DCT can be computed by multiplication with the inverse of the DCT matrix. We illustrate this with our previous example: Inverse[DCTMatrix] . output1 {0.203056, 0.980407, 0.35312, -0.106651, 0.0399382, 0.871475, -0.648355, 0.501067} % - input1

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