Title :
Multiple, arbitrary shape ROI coding with zerotree based wavelet coders
Author :
Cuhadar, Aysegul ; Tasdoken, Sinan
Author_Institution :
Dept. of Syst. & Comput. Eng., Carleton Univ., Ottawa, Ont., Canada
Abstract :
Region-based video coding schemes employed in MPEG-4 is also promising for still image coding applications where images contain a number of objects that can be encoded at different bit rates, such as compression of medical images for archiving and transmission. Motivated by this act, in this paper we investigate multi-region and multi-quality (MRMQ) coding based on zerotree wavelet coders. We present a novel scheme which addresses the region size sensitivity problem in region-based coding. The proposed method outperforms the region of interest (ROI) coding unit of JPEG-2000, i.e., it is possible to save 0.3 bits per pixel to attain the same ROI/background rate-distortion performance with the proposed MRMQ coding scheme.
Keywords :
data compression; discrete wavelet transforms; image resolution; medical image processing; rate distortion theory; transform coding; video coding; JPEG-2000; MPEG-4; MRMQ coding; ROI/background rate-distortion performance; SA-DWT; arbitrary shape ROI coding; bit rates; image archiving; image transmission; medical image compression; multi-region multi-quality coding; pixel; region of interest coding; region size sensitivity; region-based video coding; shape adaptive discrete wavelet transform; still image coding; zerotree based wavelet coders; zerotree wavelet coders; Biomedical imaging; Bit rate; Discrete cosine transforms; Discrete wavelet transforms; Encoding; Image coding; MPEG 4 Standard; Rate-distortion; Scalability; Shape;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03). 2003 IEEE International Conference on
Print_ISBN :
0-7803-7663-3
DOI :
10.1109/ICASSP.2003.1199156
