To solve the shortcomings of JPEG2 000 that a large number of bits for coding the shape information are consumed in the Generic scaling based method,and the relative qualities of the ROI and background can′t be controlled in the MaxShift method,and the problem in SPIHT that the pertinence of the brother nodes of wavelet sub-bands is ignored,a method that a part of the background bit-plane shifts toword a lower bit-plane and the improvement of zero-tree structure coding algorithm based on the SPI...