Wavelet image compression/recovery apparatus and method using human visual system modeling
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United States of America Patent
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May 19, 1998
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N/A
app pub date -
Aug 3, 1995
filing date -
Apr 19, 1995
priority date (Note) -
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Abstract
Input image data is wavelet-transformed into wavelet transformed data. First, second and third quantization values respectively corresponding to the frequency variation, background brightness and edge state of the wavelet transformed data are determined. The wavelet transformed data is quantized by using a human visual quantization value for each region corresponding to the first, second and third quantization values. The quantized data is entropy-encoded to generate compressed image data.
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