56 lines
1.0 KiB
JavaScript
56 lines
1.0 KiB
JavaScript
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import convertRgbToYiq from './convertRgbToYiq.js';
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import convertYiqToRgb from './convertYiqToRgb.js';
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import { interpolatorLinear } from '../interpolate/linear.js';
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import { fixupAlpha } from '../fixup/alpha.js';
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/*
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YIQ Color Space
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References
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----------
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Wikipedia:
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https://en.wikipedia.org/wiki/YIQ
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"Measuring perceived color difference using YIQ NTSC
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transmission color space in mobile applications"
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by Yuriy Kotsarenko, Fernando Ramos in:
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Programación Matemática y Software (2010)
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Available at:
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http://www.progmat.uaem.mx:8080/artVol2Num2/Articulo3Vol2Num2.pdf
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*/
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const definition = {
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mode: 'yiq',
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toMode: {
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rgb: convertYiqToRgb
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},
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fromMode: {
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rgb: convertRgbToYiq
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},
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channels: ['y', 'i', 'q', 'alpha'],
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parse: ['--yiq'],
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serialize: '--yiq',
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ranges: {
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i: [-0.595, 0.595],
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q: [-0.522, 0.522]
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},
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interpolate: {
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y: interpolatorLinear,
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i: interpolatorLinear,
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q: interpolatorLinear,
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alpha: { use: interpolatorLinear, fixup: fixupAlpha }
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}
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};
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export default definition;
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