Edit File: convertRgbToXyb.js
import convertRgbToLrgb from '../lrgb/convertRgbToLrgb.js'; import { bias, bias_cbrt } from './constants.js'; const transfer = v => Math.cbrt(v) - bias_cbrt; const convertRgbToXyb = color => { const { r, g, b, alpha } = convertRgbToLrgb(color); const l = transfer(0.3 * r + 0.622 * g + 0.078 * b + bias); const m = transfer(0.23 * r + 0.692 * g + 0.078 * b + bias); const s = transfer( 0.24342268924547819 * r + 0.20476744424496821 * g + 0.5518098665095536 * b + bias ); const res = { mode: 'xyb', x: (l - m) / 2, y: (l + m) / 2, /* Apply default chroma from luma (subtract Y from B) */ b: s - (l + m) / 2 }; if (alpha !== undefined) res.alpha = alpha; return res; }; export default convertRgbToXyb;
Back