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Visually optimal DCT quantization matrices for individual images (1993)
The JPEG, MPEG, and CCITT H.261 image compression standards employ the Discrete Cosine Transform as a basic mechanism (Wallace, 1991). In JPEG, the DCT is applied to 8 by 8 pixel blocks, followed by uniform quantization of the DCT coefficient matrix. The quantization bin-widths for the various coefficients are specified by a quantization matrix (QM). The QM is not defined by the standard, but is supplied by the user and stored or transmitted with the compressed image.
DCT, images, individual, matrices, optimal, quantization, Visually
Data Compression Conference, 1993. DCC '93. 30 March-2 April 1993 Page(s):178 – 187
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