color-space - npm Package Compare versions

Comparing version 1.9.0 to 1.10.0

index.js

@@ -26,2 +26,3 @@ /**
 	ycbcr: require('./ycbcr'),
+	yccbccrc: require('./yccbccrc'),
 	lab: require('./lab'),
@@ -28,0 +29,0 @@ labh: require('./labh'),

package.json

 {
   "name": "color-space",
   "description": "Color space conversions and data",
-  "version": "1.9.0",
+  "version": "1.10.0",
   "author": "Deema Yvanow <[e-mail]>",
@@ -6,0 +6,0 @@ "keywords": [

readme.md

@@ -66,3 +66,3 @@ # Color-space [![Build Status](https://travis-ci.org/dfcreative/color-space.svg?branch=master)](https://travis-ci.org/dfcreative/color-space) [![Code Climate](https://codeclimate.com/github/dfcreative/color-space/badges/gpa.svg)](https://codeclimate.com/github/dfcreative/color-space) [![stable](http://badges.github.io/stability-badges/dist/stable.svg)](http://github.com/badges/stability-badges)
 * [x] [YC<sub>b</sub>C<sub>r</sub>](https://en.wikipedia.org/wiki/YCbCr)
-* [ ] [Y<sub>c</sub>C<sub>bc</sub>C<sub>rc</sub>](https://en.wikipedia.org/wiki/YCbCr#ITU-R_BT.2020_conversion)
+* [x] [Y<sub>c</sub>C<sub>bc</sub>C<sub>rc</sub>](https://en.wikipedia.org/wiki/YCbCr#ITU-R_BT.2020_conversion)
 * [ ] [JPEG](https://en.wikipedia.org/wiki/YCbCr#JPEG_conversion)
@@ -69,0 +69,0 @@ * [ ] [XvYCC](https://en.wikipedia.org/wiki/XvYCC)

yccbccrc.js

 /**
- * https://en.wikipedia.org/?title=YCbCr
+ * YcCbcCrc is ITU-R BT.2020
  *
- * YCbCr is a digital form of YPbPr conversion
- * Thence limits are [0..255]
- *
- * @module  color-space/ycbcr
+ * @module  color-space/yccbccrc
  */
 
 var rgb = require('./rgb');
+var ypbpr = require('./ypbpr');
 
-var ycbcr = module.exports = {
-	name: 'ycbcr',
-	min: [16, 16, 16],
-	max: [235, 240, 240],
-	channel: ['Y','Cb','Cr'],
-	alias: ['YCbCr', 'YCC']
+var yccbccrc = module.exports = {
+	name: 'yccbccrc',
+	min: [0, -0.5, -0.5],
+	max: [1, 0.5, 0.5],
+	channel: ['Yc','Cbc','Crc'],
+	alias: ['YcCbcCrc']
 };
@@ -22,20 +20,10 @@
 /**
- * YCbCr to RGB
+ * YcCbcCrc to RGB
  *
- * @param {Array} ycbcr RGB values
+ * @param {Array} yccbccrc RGB values
  *
- * @return {Array} YCbCr values
+ * @return {Array} YcCbcCrc values
  */
-ycbcr.rgb = function(ycbcr, kb, kr) {
-	var y = ycbcr[0]/255, cb = ycbcr[1]/100, cr = ycbcr[2]/100;
-
-	//default conversion is ITU-R BT.709
-	kb = kb || 0.0722;
-	kr = kr || 0.2126;
-
-	var r = y + 2 * cr * (1 - kr);
-	var b = y + 2 * cb * (1 - kb);
-	var g = (y - kr * r - kb * b) / (1 - kr - kb);
-
-	return [r,g,b];
+yccbccrc.rgb = function(yccbccrc) {
+	return ypbpr.rgb(yccbccrc, 0.0593, 0.2627);
 };
@@ -45,20 +33,10 @@
 /**
- * RGB to YCbCr
+ * RGB to YcCbcCrc
  *
- * @param {Array} ycbcr YCbCr values
+ * @param {Array} yccbccrc YcCbcCrc values
  *
  * @return {Array} RGB values
  */
-rgb.ycbcr = function(rgb, kr, kb) {
-	var r = rgb[0], g = rgb[1], b = rgb[2];
-
-	//default conversion is ITU-R BT.709
-	kb = kb || 0.0722;
-	kr = kr || 0.2126;
-
-	var y = kr*r + (1 - kr - kb)*g + kb*b;
-	var cb = 0.5* (b - y) / (1 - kb);
-	var cr = 0.5* (r - y) / (1 - kr);
-
-	return [y, cb, cr];
+rgb.yccbccrc = function(arr, kr, kb) {
+	return rgb.ypbpr(arr, 0.0593, 0.2627);
 };

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Worsened metrics

Total package byte prevSize

92516

decreased by-0.47%

Lines of code

2931

decreased by-0.51%

No dependency changes