Correlated color temperature — spct_CCT • photobiologyInOut

Wrapper on function computeCCT from package 'colorSpec' that accepts source_spct objects.

Usage

spct_CCT(
  spct,
  isotherms = "robertson",
  locus = "robertson",
  strict = FALSE,
  named = FALSE
)

spct: source_spct A single light source spectrum.
isotherms: character A vector whose elements match one of the available isotherm families: 'robertson', 'mccamy', and 'native'. Matching is partial and case-insensitive. When more than one family is given, a matrix is returned, see Value. When isotherms = 'native' the isotherms are defined implicitly as lines perpendicular to the locus, see Details in CCTfromXYZ. The character NA (NA_character_) is taken as a synonym for 'native'.
locus: character Valid values are 'robertson' and 'precision', see above. Matching is partial and case-insensitive.
strict: logical The CIE considers the CCT of a chromaticity uv to be meaningful only if the distance from uv to the Planckian locus is less than or equal to 0.05 (in CIE UCS 1960). If strict=FALSE, then this condition is ignored. Otherwise, the distance is computed along the corresponding isotherm, and if it exceeds 0.05 the returned CCT is set to NA.
named: logical Whether to set the name attribute of the returned value to the name of the spectrum passed as argument if possible.

A numeric value for "color temperature " in degrees Kelvin.

Please see computeCCT for the details of the computations and references.


spct_CCT(white_led.source_spct)
#> [1] 2716.4
spct_CCT(sun.spct)
#> [1] 6109.408