ColorSpaces

ColorSpaces is a lightweight C++ color science library for converting between color spaces, computing perceptual differences, and performing chromatic adaptation.

Dependencies

• Make
• C++17 or higher

Installation

• Use make command to build library, all binaries will be in be in newly created build directory.
• Use make run to run tests.

Features

• Conversion between color spaces:

  • sRGB
  • Adobe RGB 1998
  • Apple RGB
  • Best RGB
  • Beta RGB
  • Bruce RGB
  • Cie RGB
  • Colormatch RGB
  • Don RGB 4
  • eciRGB v2
  • Ekta Space PS 5
  • NTSC RGB
  • Pal Secam RGB
  • ProPhoto RGB
  • Smpte-C RGB
  • Wide Gamut RGB
  • CIE Lab
  • CIE LCh(ab)
  • CIE LUV
  • CIE LCh(uv)
  • CIE XYZ (1931)
  • CIE xyY

• Perceptual color difference formulas:

  • CIE76
  • CIE94 (Graphics/Textiles)
  • CIEDE2000

• Chromatic adaptation between white points:

  • A, B, C, D50, D55, D65, D75, E, F2, F7, F11

Example Usage

// specify a named RGB color space when converting both to and from RGB
Color_Space::Rgb rgb(30, 99, 15);
Color_Space::Xyz xyz = rgb.to_xyz(Color_Space::SMPTE_C_RGB).adapt_to_white_point(Color_Space::D75);
Color_Space::Lab lab = xyz.to_lab();

// alternatively, when declaring a color you can specify the referenced illuminant as the fourth  argument
Color_Space::Lab other_lab(53.2f, 15.0f, -40.0f, Color_Space::D75);

float deltaE = lab.diff_cie_2000(other_lab);

References

• Bruce Lindbloom's Color Science