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Image Compression Using the Discrete Cosine Transform

Volume 4, Issue 1
Winter 1994
Andrew B. Watson, NASA Ames Research Center

The discrete cosine transform (DCT) is a technique for converting a signal into elementary frequency components. It is widely used in image compression. Here we develop some simple functions to compute the DCT and to compress images. These functions illustrate the power of Mathematica in the prototyping of image processing algorithms.

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