Initial Commit

node_modules/color-space/yuv.js

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+/**
+ * YUV https://en.wikipedia.org/?title=YUV
+ *
+ * @module  color-space/yuv
+ */
+import rgb from './rgb.js';
+
+var yuv = ({
+	name: 'yuv',
+	min: [0, -0.5, -0.5],
+	max: [1, 0.5, 0.5],
+	channel: ['Y', 'U', 'V'],
+	alias: ['YUV', 'EBU'],
+});
+
+yuv.rgb = function (yuv) {
+	var y = yuv[0],
+		u = yuv[1],
+		v = yuv[2],
+		r, g, b;
+
+	r = (y * 1) + (u * 0) + (v * 1.13983);
+	g = (y * 1) + (u * -0.39465) + (v * -0.58060);
+	b = (y * 1) + (u * 2.02311) + (v * 0);
+
+	r = Math.min(Math.max(0, r), 1);
+	g = Math.min(Math.max(0, g), 1);
+	b = Math.min(Math.max(0, b), 1);
+
+	return [r * 255, g * 255, b * 255];
+}
+
+
+//extend rgb
+rgb.yuv = function (rgb) {
+	var r = rgb[0] / 255,
+		g = rgb[1] / 255,
+		b = rgb[2] / 255;
+
+	var y = (r * 0.299) + (g * 0.587) + (b * 0.114);
+	var u = (r * -0.14713) + (g * -0.28886) + (b * 0.436);
+	var v = (r * 0.615) + (g * -0.51499) + (b * -0.10001);
+
+	return [y, u, v];
+};
+
+
+export default yuv;