Title :
Hybrid adaptive image coding: transform coding and vectorial classification approach for bit allocation
Author :
Neto, Sebastião Do Nascimento ; de Oliveira Nascimento, Francisco Assis
Author_Institution :
GPDS, Campus Universitario, Asa Norte, Brazil
Abstract :
An adaptive transform coding of images is presented. Zonal sampling is used to select significant coefficients to be coded and which are delimited by imposed segmental signal-to-noise ratio in each block. The bit allocation scheme uses a codebook for vectorial classification. Good objective and subjective results are obtained when compared with other coders
Keywords :
adaptive codes; image classification; image coding; transform coding; adaptive transform coding; bit allocation; codebook; hybrid adaptive image coding; objective results; segmental signal-to-noise ratio; subjective results; vectorial classification; zonal sampling; Bit rate; Discrete cosine transforms; Discrete transforms; Electronic mail; Image coding; Image sampling; Image segmentation; Image storage; Synthetic aperture sonar; Transform coding;
Conference_Titel :
Circuits and Systems, 1995., Proceedings., Proceedings of the 38th Midwest Symposium on
Conference_Location :
Rio de Janeiro
Print_ISBN :
0-7803-2972-4
DOI :
10.1109/MWSCAS.1995.510221
