TY  - JOUR
AU  - Kaida Xiao
AU  - Sophie Wuerger
AU  - Chenyang Fu
AU  - Dimosthenis Karatzas
PY  - 2011//
TI  - Unique Hue Data for Colour Appearance Models. Part i: Loci of Unique Hues and Hue Uniformity
T2  - CRA
JO  - Color Research & Application
SP  - 316
EP  - 323
VL  - 36
IS  - 5
PB  - Wiley Periodicals Inc
KW  - unique hues
KW  - colour appearance models
KW  - CIECAM02
KW  - hue uniformity
N2  - Psychophysical experiments were conducted to assess unique hues on a CRT display for a large sample of colour-normal observers (n 1⁄4 185). These data were then used to evaluate the most commonly used colour appear- ance model, CIECAM02, by transforming the CIEXYZ tris- timulus values of the unique hues to the CIECAM02 colour appearance attributes, lightness, chroma and hue angle. We report two findings: (1) the hue angles derived from our unique hue data are inconsistent with the commonly used Natural Color System hues that are incorporated in the CIECAM02 model. We argue that our predicted unique hue angles (derived from our large dataset) provide a more reliable standard for colour management applications when the precise specification of these salient colours is im- portant. (2) We test hue uniformity for CIECAM02 in all four unique hues and show significant disagreements for all hues, except for unique red which seems to be invariant under lightness changes. Our dataset is useful to improve the CIECAM02 model as it provides reliable data for benchmarking.
UR  - http://dx.doi.org/10.1002/col.20637
N1  - DAG
ID  - Kaida Xiao2011
ER  -