colorSpec: Color Calculations with Emphasis on Spectral Data

Calculate with spectral properties of light sources, materials, cameras, eyes, and scanners. Build complex systems from simpler parts using a spectral product algebra. For light sources, compute CCT, CRI, SSI, and IES TM-30 reports. For object colors, compute optimal colors and Logvinenko coordinates. Work with the standard CIE illuminants and color matching functions, and read spectra from text files, including CGATS files. Estimate a spectrum from its response. A user guide and 9 vignettes are included.

Version:	1.8-0
Depends:	R (≥ 4.0.0)
Imports:	logger
Suggests:	spacesXYZ (≥ 1.5-1), rootSolve, MASS, quadprog, rgl, spacesRGB, zonohedra (≥ 0.4-0), microbenchmark, arrangements, knitr, rmarkdown, png
Enhances:	plyr
Published:	2025-06-10
DOI:	10.32614/CRAN.package.colorSpec
Author:	Glenn Davis [aut, cre]
Maintainer:	Glenn Davis <gdavis at gluonics.com>
License:	GPL (≥ 3)
Copyright:	see file COPYRIGHTS
NeedsCompilation:	no
Citation:	colorSpec citation info
Materials:	README, NEWS
CRAN checks:	colorSpec results

Documentation:

Reference manual:

colorSpec.html , colorSpec.pdf

Vignettes:

colorSpec User Guide (source, R code) Phenol Red - pH Indicator (source, R code) Photon Counting (source, R code) Blue Flame and Green Comet - being a Spectral Analysis of Comet Vapor (source, R code) Convexity and Transitions (source, R code) Emulation of one Camera by another Camera (source, R code) Viewing Object Colors in a Gallery (source, R code) Estimating a Spectrum from its Response - Inverse Colorimetry (source, R code) The Effect of the Aging Human Lens on Color Vision (source, R code) Plotting Chromaticity Loci of Optimal and Schrodinger Colors - the MacAdam Limits (source, R code)

Downloads:

Package source:	colorSpec_1.8-0.tar.gz
Windows binaries:	r-devel: colorSpec_1.8-0.zip, r-release: colorSpec_1.8-0.zip, r-oldrel: colorSpec_1.8-0.zip
macOS binaries:	r-release (arm64): colorSpec_1.8-0.tgz, r-oldrel (arm64): colorSpec_1.8-0.tgz, r-release (x86_64): colorSpec_1.8-0.tgz, r-oldrel (x86_64): colorSpec_1.8-0.tgz
Old sources:	colorSpec archive

Reverse dependencies:

Reverse imports:	OxSR, photobiologyInOut, Spectran
Reverse suggests:	munsellinterpol
Reverse enhances:	spacesXYZ

Linking:

Please use the canonical form https://CRAN.R-project.org/package=colorSpec to link to this page.