A new method for JPEG2000 region-of-interest image coding: most significant bitplanes shift

Region-of-interest (ROI) image coding is one of the new features included in the JPEG2000 image coding standard, where two methods are defined, i.e., the Maxshift method and the generic scaling based method. In this paper, we propose a new JPEG2000 compliant ROI coding method called Most Significant Bitplane Shift (MSBShift) that combines the advantages of the two standard methods. The MSBShift method not only supports arbitrarily shaped ROI coding without coding the shape, but also enables the flexible adjustment of compression quality in the ROI and background. Additionally, the new method can efficiently code multiple ROIs with different priorities in an image.