Image compression scheme based on wavelet transform Space Solar Telescope

Details Image compression scheme based on wavelet transform Space Solar Telescope Image compression scheme based on wavelet transform Space Solar Telescope

Jun 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001pbeio..37..108t&link_type=abstract

Astrophysics Reports. Publications of the Beijing Astronomical Observatory, No. 37, p. 108 - 112 (2001). In: Proceedings of the

Astronomy and Astrophysics

Astrophysics

Wavelet Transform, Vq Coding, Lgb, Image Compression

Scientific paper

Based on WT (wavelet transform), a scheme for image data compression is presented. Firstly, in this method, the image is decomposed in multi-resolution by WT, and then, considering the fact that the importance and the energy contained in those bands are different, different coding methods are applied to different frequency bands. By this way the conflict between CR (compression ratio) and system hardware performance that arise when using VQ (Vector Quantization) coding method can be avoided effectively, for higher CR needs larger vector dimensions, as a result, larger memory and higher searching speed for suited vector during decoding process are required. At the same time, compared with JPEG scheme, the image quality has progressed.

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