In this paper, we give a new coding scheme for multi-level images, which is called progressive coding scheme. This coding scheme is suitable for interactive image communication, for example image data-dase retrieval and teleconference. When progressive coding scheme is applied, the receiver can quickly recognize the contents of the receiving image and image quality can be progressively improved, if necessary, by adding supplementary information. Firstly, we propose the coding algorithm of progressive coding scheme. Secondly, we evaluate coding efficiency and image quality of the proposed coding scheme. Finally, some applications of the proposed coding scheme are described.
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