Title :
Optimized adaptive AMBTC
Author :
Chan, K.W. ; Chan, K.L.
Author_Institution :
Dept. of Electron. Eng., City Polytech. of Hong Kong, Kowloon, Hong Kong
Abstract :
An adaptive, multi-level absolute moment block truncation coding (AMBTC) is optimized with DRT and CAO to yield near perfect visual quality. The AMBTC will adapt to the signal variance and switch the output from 1 to 4 levels. The thresholds for 2- and 4-level are optimized by dynamic range tuning (DRT) while those of 3-level by central aggregate optimization (CAO). This optimized coding system eliminates the blockiness and the jagged edge artifact completely. The performance also leads the closest by a great margin
Keywords :
adaptive signal processing; block codes; image coding; optimisation; AMBTC; adaptive coding; central aggregate optimization; dynamic range tuning; multi-level absolute moment block truncation coding; optimized adaptive AMBTC; performance; signal variance; thresholds; visual quality; Aggregates; Cities and towns; Dynamic range; Image coding; Mean square error methods; Performance evaluation; Pixel; Quantization; Statistical distributions; Switches;
Conference_Titel :
Image Processing, 1994. Proceedings. ICIP-94., IEEE International Conference
Conference_Location :
Austin, TX
Print_ISBN :
0-8186-6952-7
DOI :
10.1109/ICIP.1994.413594
