DocumentCode :
290196
Title :
Residual image coding using mathematical morphology
Author :
Casas, J.R. ; Torres, Luis
Author_Institution :
Dept. of Signal Theory & Commun., Univ. Politecnica de Catalunya, Barcelona, Spain
Volume :
v
fYear :
1994
fDate :
19-22 Apr 1994
Abstract :
A new method for the extraction, selection and coding of perceptually significant image components in a video sequence is presented. It has been applied to the coding residues of a segmentation-based multilevel coding scheme in order to show the need for a careful perceptual selection in very low bit-rate video coding applications. Mathematical morphology operators are used for the extraction and selection steps of the proposed algorithm. The locations of the selected image components are then efficiently coded with a positional coder using prediction in the temporal dimension. The results show that for coding rates lower than 10 kbit/s, perceptual selection becomes a critical issue in order to achieve a good coding rendition. At higher rates, the fact of considering perceptual factors also leads to higher compression for similar subjective image quality
Keywords :
data compression; image coding; image segmentation; mathematical morphology; prediction theory; video coding; algorithm; coding rates; image compression; image extraction; image selection; mathematical morphology; perceptual factors; perceptual selection; perceptually significant image components; positional coder; residual image coding; segmentation-based multilevel coding; subjective image quality; temporal dimension; very low bit-rate video coding; video sequence; Channel capacity; Costs; Image coding; Image quality; Image reconstruction; Image segmentation; Morphology; Scalability; Video coding; Video sequences;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1994. ICASSP-94., 1994 IEEE International Conference on
Conference_Location :
Adelaide, SA
ISSN :
1520-6149
Print_ISBN :
0-7803-1775-0
Type :
conf
DOI :
10.1109/ICASSP.1994.389452
Filename :
389452
Link To Document :
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