volume 80, issue 12, P37-44 1997
DOI: 10.1002/(sici)1520-6440(199712)80:12<37::aid-ecjc5>3.0.co;2-p
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Abstract: This paper proposes a new scheme for image coding using the wavelet transform. We decompose the original image into seven subbands with a two‐level tree‐structured filter bank. Vector quantization is applied to the coefficients of the high‐frequency subbands, and 2‐D DPCM to the lowest‐frequency subband. A vector is formed by unifying n significant coefficients whose amplitude is larger than a preassigned threshold. Then, in order to compress the position information of those significant coefficients, we decid…

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