ciexy2uv

The ciexy2uv function transforms CIE 1931 chromaticity coordinates x and y to CIE 1960 chromaticity coordinates u and v, using the following transformation:

Any errors in the data set or in results generated with the Lighting Toolbox are not in the liability of the CIE nor me, see licence.

Usage:

[u,v] = ciexy2uv(x,y)

Where:

It is possible to transform several chromaticity coordinates in one function call, using a 1\times n or n\times 1 vector as input.

Examples

Transform CIE 1931 chromaticity coordinates x and y to CIE 1960 chromaticity coordinates u and v and back:

x = 0.3451;
y = 0.2973;
[u,v] = ciexy2uv(x,y)
[x,y] = cieuv2xy(u,v)

See also: cieuv2xy

Result:

u = 0.2349
v = 0.3035

x = 0.3451
y = 0.2973

Transform several CIE 1931 chromaticity coordinates x and y to CIE 1960 chromaticity coordinates u and v:

x = [0.3124 0.2934 0.3654];
y = [0.3123 0.3421 0.2982];
[u,v] = ciexy2uv(x,y)

Result:

u =

   0.2041   0.1800   0.2499

v =

   0.3060   0.3149   0.3060

Determine and plot the whitpoint of standard illumimant ‘D65’ in the CIE 1960 u,v chromiticity:

lam = 360:830;
spec = ciespec(lam,'D65');
xyz = ciespec2xyz(lam,spec);
[u,v] = ciexy2uv(xyz(1),xyz(2))
plotcieuv(u,v)

See also: ciespec, ciespec2xyz, plotcieuv, ciespec2uvw

Result:

u = 0.1978
v = 0.3122

Reference