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Erschienen in:
2009 | OriginalPaper | Buchkapitel
A New Wavelet–Fractal Image Compression Method
verfasst von : Vu Thanh Hien
Erschienen in: Knowledge-Based and Intelligent Information and Engineering Systems
Verlag: Springer Berlin Heidelberg
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This paper proposes a new wavelet-fractal image compression method by studying the limitation of existing wavelet based image compression methods. Initial errors occur at different levels of importance according to the frequencies of sublevel-band wavelet coefficients. Higher frequency sublevel bands would lead to larger initial errors. As a result, the sizes of sublevel blocks and super blocks would be changed according to the initial errors. The matching sizes between sublevel blocks and super blocks would be changed according to the permitted errors and compression rates.