In application of remote image, users often specially focus on some areas named region of interest and hope data in these areas to be coded and transmitted preferentially. Progressive coding technology based on ROI can meet the demand of users very well. This paper firstly analyzes some deficiency of traditional ROI coding methods, then put forward a novel progressive coding method based on ROI. The core idea of this method is that, on the basis of regular wavelet subband, separate high frequency subband into high frequency ROI subband and high frequency BG subband and rearrange transformed wavelet subbands, then realize progressive coding from low frequency subband, high frequency ROI subband to high frequency BG subband. Experiment shows the method advanced in this paper is effective and superior.
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