Ouafi, A.  , Z.E. Baarir  , A. Taleb Ahmed  , N. Doghmane  , 
    A New Approach Based on Shapiro`s Embedded Zerotree Wavelet (Ezw) Algorithm for Image Compression,
    Asian Journal of Information Technology,
    Volume 5,Issue 8,
    2006,
    Pages 893-900,
    ISSN 1682-3915,
    ajit.2006.893.900,
    (https://makhillpublications.co/view-article.php?doi=ajit.2006.893.900)
    Abstract: In this paper, we propose a new study to image compression based on the principle of Shapiro`s Embedded Zerotree Wavelet (EZW) algorithm. Our study, the modified EZW (MEZW), distributes entropy differently than Shapiro`s and also optimizes the coding. This study can produce results that are a significant improvement on the PSNR and compression ratio obtained by Shapiro, without affecting the computing time. These results are also comparable with those obtained using the SPIHT and SPECK algorithms.
    Keywords: Image compression;shapiro`s EZW algorithm;MEZW;entropy;coding;PSNR;compression ratio;SPIHT and SPECK algorithms