Region of interest compression using pyramidal coding schemes
Pankaj Topiwala, Richard D. Forkert · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1995
We develop a second-generation subband image coding algorithm which exploits the pyramidal structure of transform-domain representations to achieve variable-resolution compression. In particular, regions of interest within an image can be selectively retained at higher fidelity than other regions. This type of coding allows for rapid, very high compression, which is especially suitable for the timely communication of image data over bandlimited channels.