R: Convert value to a tristimulus values normalised to Y=100

as_white_ref {farver} | R Documentation

## Convert value to a tristimulus values normalised to Y=100

### Description

This function can take either the name of a standardised illuminants, x and y chromaticity coordinates or X, Y, and Z tristimulus values and converts it to tristimulus values normalised to Y=100. All Illuminant series A-F are supported and can be queried both on the CIE 1931 2° and CIE 1964 10° chromaticity coordinates.

### Usage

    as_white_ref(x, fow = 2)

### Arguments

`x` | A string giving the name of the standardized illuminant or a 2 (chromaticity) or 3 (trsitimulus) length numeric vector.
`fow` | The field-of-view for the illuminant - either `2` or `10`

### Value

A 3-length vector with tristimulus values

### Examples

    # Using names
    as_white_ref('D65')

    # Using chromaticity values
    as_white_ref(c(0.3, 0.4))

[Package farver version 2.0.2 Index]