Title :
Apriorirate Allocation in Wavelet-Based Image Compression
Author :
Grottke, S. ; Richter, Thomas ; Seiler, Ruedi
Author_Institution :
Dept. of Math. & Natural Sci., Berlin Univ. of Technol.
Abstract :
We present a rate allocation scheme that pre-computes optimal quantization bucket sizes based on a mathematical model of wavelet transformed natural images prior entropy encoding. We combine our scheme with the JPEG2000 embedded rate-allocator and find in our experiments that it is able to increase JPEG2000 encoding speed by a factor of two without losing image quality.
Keywords :
data compression; image coding; wavelet transforms; JPEG2000 embedded rate-allocator; JPEG2000 encoding; image quality; optimal quantization bucket sizes; rate allocation; wavelet-based image compression; Entropy; Gaussian processes; Image coding; Image quality; Mathematical model; Mathematics; Predictive models; Quantization; Statistics; Transform coding;
Conference_Titel :
Communications and Networking in China, 2006. ChinaCom '06. First International Conference on
Conference_Location :
Beijing
Print_ISBN :
1-4244-0463-0
Electronic_ISBN :
1-4244-0463-0
DOI :
10.1109/CHINACOM.2006.344920
