The relationship between colour metrics and the appearance of three-dimensional coloured objects

✍ Scribed by Christine Connolly

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 597 KB
• Volume: 21
• Category: Article
• ISSN: 0361-2317
• DOI: 10.1002/(sici)1520-6378(199610)21:5<331::aid-col2>3.0.co;2-z

✦ Synopsis

This urticle explores the relationship between the colour descriptors used in classical colour theory and machine vision, and the appearance of three-dimensional objects exhibiting geometric lighting effects. Various colour tran.@wmation equations are analyzed to determine their response to intensity changes, and their perceptual uniformity. It is suggested that a logarithmic chromaticity plune hus udvantages for the processing OJ images of three-dimensional scenes. The logarithmic function removes any intensity variation from the chromaticity metrics, und provides a chromaticity plane that is uniform with respect to hue, and reasonably uniform in chroma.

Evidence of two types-mathematical and experimental-is given in support of this claim.