Class ColorScience

java.lang.Object
org.episteme.social.arts.ColorScience
public final class ColorScience extends Object
Advanced color science utility class for color space transformations, perceptual difference calculations (Delta E), and color harmony generation. This class provides high-precision implementations of CIE colorimetry standards.
Since:
1.0
Version:
2.0
Author:
Silvere Martin-Michiellot, Gemini AI (Google DeepMind)

  • Method Summary

    Modifier and Type
    Method
    Description
    static int[]
    complementary(int r, int g, int b)
    Generates the complementary color (opposite on the color wheel).
    static Real
    deltaE2000(double[] lab1, double[] lab2)
    Calculates Delta E (CIE2000) - modern standard for perceptual uniformity.
    static Real
    deltaE76(double[] lab1, double[] lab2)
    Calculates Delta E (CIE76) - Euclidean distance in CIELAB space.
    static double[]
    rgbToLab(int r, int g, int b)
    Converts sRGB (0-255) to CIE Lab color space.
    static double[]
    rgbToXyz(int r, int g, int b)
    Converts sRGB to CIE XYZ.
    static int[][]
    triadic(int r, int g, int b)
    Generates triadic colors (three colors spaced 120° apart on the color wheel).
    static double[]
    xyzToLab(double x, double y, double z)
    Converts CIE XYZ to CIE Lab (D65 illuminant).

    Methods inherited from class Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Method Details

    • rgbToLab

      public static double[] rgbToLab(int r, int g, int b)
      Converts sRGB (0-255) to CIE Lab color space.
      Parameters:
      r - red component (0-255)
      g - green component (0-255)
      b - blue component (0-255)
      Returns:
      array containing {L, a, b} components

    • rgbToXyz

      public static double[] rgbToXyz(int r, int g, int b)
      Converts sRGB to CIE XYZ.
      Parameters:
      r - red component (0-255)
      g - green component (0-255)
      b - blue component (0-255)
      Returns:
      array containing {X, Y, Z} components

    • xyzToLab

      public static double[] xyzToLab(double x, double y, double z)
      Converts CIE XYZ to CIE Lab (D65 illuminant).
      Parameters:
      x - X component
      y - Y component
      z - Z component
      Returns:
      array containing {L, a, b} components

    • deltaE76

      public static Real deltaE76(double[] lab1, double[] lab2)
      Calculates Delta E (CIE76) - Euclidean distance in CIELAB space.
      Parameters:
      lab1 - first color in Lab space
      lab2 - second color in Lab space
      Returns:
      the color difference as a Real value

    • deltaE2000

      public static Real deltaE2000(double[] lab1, double[] lab2)
      Calculates Delta E (CIE2000) - modern standard for perceptual uniformity. This formula is significantly more complex than CIE76 but much closer to human perception.
      Parameters:
      lab1 - first color in Lab space
      lab2 - second color in Lab space
      Returns:
      the perceived color difference as a Real value

    • complementary

      public static int[] complementary(int r, int g, int b)
      Generates the complementary color (opposite on the color wheel).
      Parameters:
      r - red component
      g - green component
      b - blue component
      Returns:
      array containing {R, G, B} of the complementary color

    • triadic

      public static int[][] triadic(int r, int g, int b)
      Generates triadic colors (three colors spaced 120° apart on the color wheel).
      Parameters:
      r - red component
      g - green component
      b - blue component
      Returns:
      array of two RGB arrays representing the other two colors in the triad