Class ColorMetrology

java.lang.Object

org.episteme.social.arts.ColorMetrology

public final class ColorMetrology
extends Object

Provides analytical tools for color measurement and comparison (Colorimetry). Implements standard color space transformations and difference calculations used in art conservation and pigment analysis.

Reference: CIE (1976). Colorimetry.

Since:

1.0

Version:

2.0

Author:

Silvere Martin-Michiellot, Gemini AI (Google DeepMind)

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final record	ColorMetrology.LabColor	Represents a color in the CIELAB (CIE 1976 L*a*b*) color space.

Method Summary

Modifier and Type	Method	Description
static double	deltaE76(ColorMetrology.LabColor c1, ColorMetrology.LabColor c2)	Calculates the Delta E (CIE76) difference between two colors.
static ColorMetrology.LabColor	rgbToLab(int r, int g, int b)	Converts RGB color values (0-255) to CIELAB space.

Methods inherited from class Object

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

Method Details

deltaE76

public static double deltaE76(ColorMetrology.LabColor c1,
 ColorMetrology.LabColor c2)

Calculates the Delta E (CIE76) difference between two colors. This represents the perceived difference between colors based on Euclidean distance in CIELAB space.

Parameters:

c1 - first color

c2 - second color

Returns:

the Delta E value (typically invalid input: '<' 1.0 is imperceptible)

rgbToLab

public static ColorMetrology.LabColor rgbToLab(int r,
 int g,
 int b)

Converts RGB color values (0-255) to CIELAB space. Assumes sRGB color space and D65 standard illuminant.

Parameters:

r - red component (0-255)

g - green component (0-255)

b - blue component (0-255)

Returns:

equivalent LabColor