6.11.3 CIELuv Queries

The following equations are useful in describing the CIELuv query functions:

CIELuv Psychometric Chroma = sqrt(u_star2 + v_star2 )

CIELuv Psychometric Hue = tan-1 (v_star / u_star)

To obtain the CIE L*u*v* coordinates of maximum Psychometric Chroma for a given Psychometric Hue Angle and CIE metric lightness (L*), use XcmsCIELuvQueryMaxC().

To obtain the CIE L*u*v* coordinates of maximum CIE metric lightness (L*) for a given Psychometric Hue Angle and Psychometric Chroma, use XcmsCIELuvQueryMaxL().

To obtain the CIE L*u*v* coordinates of maximum Psychometric Chroma for a given Psychometric Hue Angle, use XcmsCIELuvQueryMaxLC().

To obtain the CIE L*u*v* coordinates of minimum CIE metric lightness (L*) for a given Psychometric Hue Angle and Psychometric Chroma, use XcmsCIELuvQueryMinL().

Next: TekHVC Queries
Christophe Tronche