Mr. Wentao Wang Profile

Wentao Wang

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Proceedings Article | 15 November 2007 Paper

Reduced memory zerotree envelop coding for wavelet image

Wentao Wang, Guoyou Wang, Jianguo Liu

Proceedings Volume 6786, 67863R (2007) https://doi.org/10.1117/12.750454

KEYWORDS: Wavelets, Image compression, JPEG2000, Laser induced plasma spectroscopy, Computer programming, Visualization, Lithium, Cameras, Image quality, Image transmission

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In this paper, we propose a new image codec, which called embedded zerotree wavelet coefficients envelop coding (EZWCEC). The coefficients envelop is characterized by describing the global tendency of the significant wavelet coefficients. Based on the empirical analysis and experimental results, our EZWCEC algorithm restores the trend of the significant wavelet coefficients and estimates the magnitude of some insignificant coefficients on the decoder. Unlike other zerotree coding algorithms such as Said and Pearlman's SPIHT using three lists, EZWCEC only uses two lists during encoding and decoding. So the memory requirement for the hardware implementation is reduced significantly. Although PSNR values for EZWCEC are lower than SPIHT's and JPEG2000's, our experiment results have shown that EZWCEC can dramatically improve the visual quality of reconstructed at low bit rates (e.g., below 0.1bpp).

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