Region-of-interest (ROI) image coding technique means to compress interestingregions in an image without loss or with little loss, and to compress uninteresting(background) regions with much loss.

• 感兴趣区域(Region-of-interest,ROI)编码技术,即在图像中的感兴趣区域采用低压缩比的有损压缩,甚至无损压缩;