DocumentCode :
3134430
Title :
Lossless coding of color images using color space transformations
Author :
Zamora, Gilberto ; Mitra, Sunanda
Author_Institution :
Dept. of Electr. Eng., Texas Tech. Univ., Lubbock, TX, USA
fYear :
1998
fDate :
12-14 Jun 1998
Firstpage :
13
Lastpage :
18
Abstract :
The key issue in the development of lossless compression techniques has been the manipulation of the image model from a probabilistic point of view in order to reduce the bit rates as represented by the entropy of such a model. In this respect, arithmetic coding using adaptive models shows excellent performance and is easy to implement. On the other hand, many studies have been dedicated to find suitable ways to represent a color image based on the human visual response to color changes in magnitude, frequency and direction. Many of these studies have resulted in linear and nonlinear transformations of the well-known RGB and tristimulus color spaces that describe a color image in different planes, each of those being a function of the illuminance and chrominance of each pixel. Application of lossless coding techniques to these transformed color planes, such as L*a*b*, has resulted in improved performances compared to those in RGB planes
Keywords :
arithmetic codes; entropy codes; image coding; image colour analysis; software performance evaluation; source coding; L*a*b* color plane; RGB color space; adaptive models; arithmetic coding; bit rate reduction; color changes; color image coding; color space transformations; direction change; entropy; frequency change; human visual response; image model manipulation; implementability; linear transformations; lossless compression techniques; lossless image coding; magnitude change; nonlinear transformations; performance; pixel chrominance; pixel illuminance; probability; tristimulus color space; Biomedical imaging; Bit rate; Color; Data models; Digital arithmetic; Electronic mail; Entropy; Histograms; Image coding; Pixel;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Computer-Based Medical Systems, 1998. Proceedings. 11th IEEE Symposium on
Conference_Location :
Lubbock, TX
ISSN :
1063-7125
Print_ISBN :
0-8186-8564-6
Type :
conf
DOI :
10.1109/CBMS.1998.701207
Filename :
701207
Link To Document :
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