Title :
Non-linear quantisation effects in digital colour systems
Author :
Godfrey, Keith ; Attikiouzel, Yiannis
Author_Institution :
Centre for Intelligent Inf. Process. Syst., Western Australia Univ., Nedlands, WA, Australia
Abstract :
This paper shows that quantisation of colour pixels, essential to digital imagery, causes non-linear correlation in the permitted values of chromaticity coordinates in linear-intensity CIE colour spaces. It follows that colour video and image coding schemes based on these colour spaces will suffer an inherent preference for certain chromaticities
Keywords :
image coding; image colour analysis; quantisation (signal); video coding; chromaticity coordinates; colour pixels; colour video coding schemes; digital colour systems; digital imagery; image coding schemes; linear-intensity CIE colour spaces; nonlinear correlation; nonlinear quantisation effects; Australia; Image coding; Image color analysis; Information processing; Intelligent systems; Power distribution; Quantization; Retina; Smart pixels; Voltage;
Conference_Titel :
Wireless Image/Video Communications, 1996., First International Workshop on
Conference_Location :
Loughborough
Print_ISBN :
0-7803-3610-0
DOI :
10.1109/WIVC.1996.624646
