Abstract:

A new coding method based on JPEG2000 for Region of Interesting (ROI) was proposed. In this method the pixel value of the ROI was upscaled in time domain and periodically extended; afterward it was added to the pixel value of background (BG). Then based on the additive characteristics of wavelet transform, the BG wavelet transform coefficients were used to subtract the corresponding ROI coefficients after wavelet transform. The image was reconstructed in the receiver through the corresponding process. The new method has low computational complexity and eliminates the shortcoming of edge blurring produced by time domain upscaling method. Experimental results demonstrate the advantage of the new method. At the same compression rate, the subjective image quality of the new method is better than that of time domain upscaling method and the new method facilitates the receiver to understand the ROI.

Key words: information processing technology, JPEG2000, region of interesting coding, edge of ROI