High-quality DCT-based image compression using partition schemes

doi:10.1109/LSP.2006.879861

High-quality DCT-based image compression using partition schemes

2007-02-01

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Nikolay Ponomarenko *

DOI：10.1109/LSP.2006.879861

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Abstract

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This letter presents an advanced discrete cosine transform (DCT)-based image compression method that combines advantages of several approaches. First, an image is divided into blocks of different sizes by a rate-distortion-based modified horizontal-vertical partition scheme. Statistical redundancy of quantized DCT coefficients of each image block is reduced by a bit-plane dynamical arithmetical coding with a sophisticated context modeling. Finally, a post-filtering removes blocking artifacts in decompressed images. The proposed method provides significantly better compression than JPEG and other DCT-based techniques. Moreover, it outperforms JPEG2000 and other wavelet-based image coders.

Keywords:

discrete cosine transform (DCT)

image compression

partition schemes (PS)

High-quality DCT-based image compression using partition schemes

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