OOF2: The Manual

Name

ColorNorm — Ways of measuring the difference between two colors.

Description

ColorNorms are different ways of measuring the difference between Colors. They're used in the Burn pixel selection algorithm.[39]

The difference between two colors in the L1 norm is the average of the absolute values of the differences of their red, green, and blue values. That is, it's the difference of the gray value equivalents of the colors.

The difference between two colors in the L2 norm is the square root of the sum of the squares of the differences of their red, green, and blue values.

Values

  • L1: The sum of the absolute values of the RGB differences.
  • L2: The square root of the sum of the squares of the RGB differences.


[39] Burn could have been defined using the ColorDifference classes instead, but it wasn't, for historical reasons.