Title :
Variable decay rate histogram modelling for image compression
Author :
Trumbo, Mark ; Vaisey, Jacques
Author_Institution :
IBM Thomas J. Watson Res. Center, Yorktown Heights, NY, USA
Abstract :
Several methods exist for adaptation to non-stationary statistics in histogram modelling. Among the techniques that perform local adaptation by decaying histogram counts, we show that fixed decay rate schemes are sub-optimal. We use an order-0 model and an arithmetic coder to demonstrate that improved performance can be obtained by using a variable decay rate scheme that uses the derivative of the per-symbol codelength sequence to control the rate of decay
Keywords :
arithmetic codes; data compression; image coding; image sequences; statistical analysis; arithmetic coder; decay rate control; decaying histogram counts; fixed decay rate; image compression; local adaptation; nonstationary statistics; per-symbol codelength sequence; performance; variable decay rate histogram modelling; Arithmetic; Councils; Entropy; Frequency; Gray-scale; Histograms; Image coding; Probability distribution; Statistics;
Conference_Titel :
Image Processing, 1995. Proceedings., International Conference on
Conference_Location :
Washington, DC
Print_ISBN :
0-8186-7310-9
DOI :
10.1109/ICIP.1995.537660
