closest.color.from.palette: Find closest color from palette for each RGB color.

In wal: Read and Write 'wal' Bitmap Image Files and Other 'Quake' Assets

Description

Find closest color from a palette for given colors. The similarity method used to define 'closest' is deltaE, and the input RGB colors are transformed to LAB space for the computation, assuming they are given in sRGB space.

Usage

closest.color.from.palette(colors_rgb, fixed_palette_rgb)

Arguments

colors_rgb	n x 3 integer matrix, the truecolor (arbitrary) input RGB colors for which you want to find the most similar colors included in the fixed palette. Range 0..255.
fixed_palette_rgb	the fixed palette, an n x 3 matrix of integers, representing the fixed palette colors in RGB values in range 0..255.

Value

vector of n integers, the index of the closest color into the palette for each of the colors_rgb.

Examples

    colors_rgb = matrix(c(255, 0, 0, 100, 100, 100, 10, 10, 10, 5, 5, 5),
     ncol = 3, byrow = TRUE);
    fixed_palette_rgb = matrix(c(255, 0, 0, 255, 5, 0, 11, 11, 11, 0, 0, 0,
     255, 255, 255), ncol = 3, byrow = TRUE);
    pal_similar_colors = closest.color.from.palette(colors_rgb,
     fixed_palette_rgb);

wal documentation built on Jan. 17, 2021, 5:10 p.m.