What's Your Sign?: Efficient Sign Coding for Embedded Wavelet Image Coding
DCC '00 Proceedings of the Conference on Data Compression
Lossless Image Data Sequence Compression Using Optimal Context Quantization
DCC '01 Proceedings of the Data Compression Conference
Embedded Image Coding Using ZeroBlocks of Subband/Wavelet Coefficients and Context Modeling
DCC '01 Proceedings of the Data Compression Conference
Embedded zerotree wavelets coding based on adaptive fuzzy clustering for image compression
Image and Vision Computing
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Recent progress in context modeling and adaptive entropy coding of wavelet coefficients is probably the most important catalyst for the rapidly maturing of wavelet image compression technology. In this paper we identify statistical context modeling of wavelet coefficients as the determining factor of rate-distortion performance of wavelet codecs. We propose a new context quantization algorithm for minimum conditional entropy. The algorithm is a dynamic programming process guided by Fisher's linear discriminant. It facilitates high-order context modeling and adaptive entropy coding of embedded wavelet bit streams, and leads to superb compression performance in both lossy and lossless cases.