A DCT-based embedded image coder
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Since Shapiro published his work on embedded zerotree wavelet (EZW) image coding , there have been increased research activities in image coding centered around wavelets. In this letter, we first point out that the wavelet transform is just one member in a family of linear transformations, and the discrete cosine transform (DCT) can also be coupled with an embedded zerotree quantizer. We then present such an image coder that out-performs any other DCT-based coder published in the literature, including that of the Joint Photographers Expert Group (JPEG). Moreover, our DCT-based embedded image coder gives higher peak signal-to-noise ratios (PSNR's) than the quoted results of Shapiro's EZW coder.
author list (cited authors)
Xiong, Z., Guleryuz, O. G., & Orchard, M. T.
complete list of authors
Guleryuz, OG||Orchard, MT