An Improved SPIHT Algorithm for Region of Interest Coding of Medical Image
Quan Xiao-chen · Science Technology and Engineer · 2005
A new ROI coding technique for medical image is introduced. By implementing the interlace upshift of binary coefficients, the compression quality of ROI and BG becomes adjustable, which can be used for the coding of arbitrary shaped ROI. According to the characteristics of the bitplane after interlaced upshift, a more efficient embedded coding algorithm based on SPIHT is presented. Moreover, theoretical analysis and simulated experiments all indicate that the proposed method is better than classical SPIHT algorithm.