Specifications

CHAPTER 3
Application Program Interface
34
VPTEngine Component
CIE1976 (u’v’) 3
This data structure is used to represent the color space defined by the CIE committee in
1976.
typedef struct CIE1976
{
doubleuPrime;
doublevPrime;
doublefL;
} CIE1976;
uPrime, vPrime Coordinates in the standard CIE 1976 (u’v’) notation.
fL Foot Lamberts, a standard unit that describes luminance.
CIE1960 (uv) 3
This data structure is used to represent the color space defined by the CIE committee in
1960.
typedef struct CIE1960
{
doubleu;
doublev;
doublefL;
} CIE1960;
u, v Coordinates in the standard CIE 1960 (uv) notation.
fL Foot Lamberts, a standard unit that describes luminance.
CIE1931(xy) 3
This data structure is used to represent the color space defined by the CIE committee in
1931. Do not confuse it with the Tristimulus format, also defined by the CIE in 1931.
typedef struct CIE1931
{
doublex;
doubley;
doublefL;
} CIE1931;
x, y Coordinates in the standard CIE 1931 (xy) notation.
fL Foot Lamberts, a standard unit that describes luminance.