mirror of https://github.com/thangisme/notes.git
451 lines
18 KiB
JavaScript
451 lines
18 KiB
JavaScript
/**
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* @author Markus Ekholm
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* @copyright 2012-2015 (c) Markus Ekholm <markus at botten dot org >
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* @license Copyright (c) 2012-2015, Markus Ekholm
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* All rights reserved.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of the <organization> nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL MARKUS EKHOLM BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* IMPORTS
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*/
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var assert = require('assert');
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var color_diff = require('../lib/diff');
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/**
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* TESTS
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*/
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/**
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* CIEDE2000 tests the diff.cie2000.
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* Cases taken from the paper "The CIEDE2000 Color-Difference Formula:
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* Implementation Notes, Supplementary Test Data, and Mathematical Observations"
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* by Gaurav Sharma, Wencheng Wu and Edul N. Dalal.
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*/
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describe('diff', function(){
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describe('#ciede2000()', function(){
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it("should use the true chroma difference (#1)", function(){
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assert_ciede2000_diff(2.0425,
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{"L" : 50.0000,
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"a" : 2.6772,
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"b" : -79.7751
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},
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{"L" : 50.0000,
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"a" : 0.0000,
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"b" : -82.7485
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});
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});
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it("should use the true chroma difference (#2)", function(){
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assert_ciede2000_diff(2.8615,
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{"L" : 50.0000,
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"a" : 3.1571,
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"b" : -77.2803
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},
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{"L" : 50.0000,
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"a" : 0.0000,
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"b" : -82.7485
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});
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});
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it("should use the true chroma difference (#3)", function(){
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assert_ciede2000_diff(3.4412,
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{"L" : 50.0000,
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"a" : 2.8361,
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"b" : -74.0200
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},
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{"L" : 50.0000,
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"a" : 0.0000,
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"b" : -82.7485
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});
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});
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it("should use the true hue difference (#4)", function(){
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assert_ciede2000_diff(1.0000,
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{"L" : 50.0000,
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"a" : -1.3802,
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"b" : -84.2814
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},
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{"L" : 50.0000,
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"a" : 0.0000,
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"b" : -82.7485
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});
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});
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it("should use the true hue difference (#5)", function(){
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assert_ciede2000_diff(1.0000,
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{"L" : 50.0000,
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"a" : -1.1848,
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"b" : -84.8006
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},
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{"L" : 50.0000,
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"a" : 0.0000,
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"b" : -82.7485
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});
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});
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it("should use the true hue difference (#6)", function(){
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assert_ciede2000_diff(1.0000,
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{"L" : 50.0000,
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"a" : -0.9009,
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"b" : -85.5211
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},
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{"L" : 50.0000,
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"a" : 0.0000,
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"b" : -82.7485
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});
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});
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it("should use the correct arctangent computation (#7)", function(){
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assert_ciede2000_diff(2.3669,
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{"L" : 50.0000,
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"a" : 0.0000,
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"b" : 0.0000
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},
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{"L" : 50.0000,
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"a" : -1.0000,
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"b" : 2.0000
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});
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});
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it("should use the correct arctangent computation (#8)", function(){
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assert_ciede2000_diff(2.3669,
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{"L" : 50.0000,
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"a" : -1.0000,
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"b" : 2.0000
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},
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{"L" : 50.0000,
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"a" : 0.0000,
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"b" : 0.0000
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});
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});
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it("should use the correct arctangent computation (#9)", function(){
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assert_ciede2000_diff(7.1792,
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{"L" : 50.0000,
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"a" : 2.4900,
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"b" : -0.0010
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},
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{"L" : 50.0000,
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"a" : -2.4900,
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"b" : 0.0009
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});
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});
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it("should use the correct arctangent computation (#10)", function(){
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assert_ciede2000_diff(7.1792,
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{"L" : 50.0000,
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"a" : 2.4900,
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"b" : -0.0010
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},
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{"L" : 50.0000,
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"a" : -2.4900,
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"b" : 0.0010
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});
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});
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it("should use the correct arctangent computation (#11)", function(){
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assert_ciede2000_diff(7.2195,
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{"L" : 50.0000,
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"a" : 2.4900,
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"b" : -0.0010
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},
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{"L" : 50.0000,
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"a" : -2.4900,
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"b" : 0.0011
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});
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});
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it("should use the correct arctangent computation (#12)", function(){
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assert_ciede2000_diff(7.2195,
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{"L" : 50.0000,
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"a" : 2.4900,
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"b" : -0.0010
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},
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{"L" : 50.0000,
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"a" : -2.4900,
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"b" : 0.0012
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});
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});
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it("should use the correct arctangent computation (#13)", function(){
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assert_ciede2000_diff(4.8045,
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{"L" : 50.0000,
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"a" : -0.0010,
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"b" : 2.4900
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},
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{"L" : 50.0000,
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"a" : 0.0009,
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"b" : -2.4900
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});
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});
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it("should use the correct arctangent computation (#14)", function(){
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assert_ciede2000_diff(4.8045,
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{"L" : 50.0000,
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"a" : -0.0010,
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"b" : 2.4900
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},
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{"L" : 50.0000,
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"a" : 0.0010,
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"b" : -2.4900
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});
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});
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it("should use the correct arctangent computation (#15)", function(){
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assert_ciede2000_diff(4.7461,
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{"L" : 50.0000,
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"a" : -0.0010,
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"b" : 2.4900
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},
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{"L" : 50.0000,
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"a" : 0.0011,
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"b" : -2.4900
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});
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});
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it("should use the correct arctangent computation (#16)", function(){
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assert_ciede2000_diff(4.3065,
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{"L" : 50.0000,
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"a" : 2.5000,
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"b" : 0.0000
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},
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{"L" : 50.0000,
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"a" : 0.0000,
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"b" : -2.5000
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});
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});
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it("should work for large color differences (#17)", function(){
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assert_ciede2000_diff(27.1492,
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{"L" : 50.0000,
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"a" : 2.5000,
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"b" : 0.0000
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},
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{"L" : 73.0000,
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"a" : 25.0000,
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"b" : -18.0000
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});
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});
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it("should work for large color differences (#18)", function(){
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assert_ciede2000_diff(22.8977,
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{"L" : 50.0000,
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"a" : 2.5000,
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"b" : 0.0000
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},
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{"L" : 61.0000,
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"a" : -5.0000,
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"b" : 29.0000
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});
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});
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it("should work for large color differences (#19)", function(){
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assert_ciede2000_diff(31.9030,
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{"L" : 50.0000,
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"a" : 2.5000,
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"b" : 0.0000
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},
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{"L" : 56.0000,
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"a" : -27.0000,
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"b" : -3.0000
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});
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});
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it("should work for large color differences (#20)", function(){
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assert_ciede2000_diff(19.4535,
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{"L" : 50.0000,
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"a" : 2.5000,
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"b" : 0.0000
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},
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{"L" : 58.0000,
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"a" : 24.0000,
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"b" : 15.0000
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});
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});
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it("should produce numbers found in the CIE technical report (#21)", function(){
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assert_ciede2000_diff(1.0000,
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{"L" : 50.0000,
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"a" : 2.5000,
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"b" : 0.0000
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},
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{"L" : 50.0000,
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"a" : 3.1736,
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"b" : 0.5854
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});
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});
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it("should produce numbers found in the CIE technical report (#22)", function(){
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assert_ciede2000_diff(1.0000,
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{"L" : 50.0000,
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"a" : 2.5000,
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"b" : 0.0000
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},
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{"L" : 50.0000,
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"a" : 3.2972,
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"b" : 0.0000
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});
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});
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it("should produce numbers found in the CIE technical report (#23)", function(){
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assert_ciede2000_diff(1.0000,
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{"L" : 50.0000,
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"a" : 2.5000,
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"b" : 0.0000
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},
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{"L" : 50.0000,
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"a" : 1.8634,
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"b" : 0.5757
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});
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});
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it("should produce numbers found in the CIE technical report (#24)", function(){
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assert_ciede2000_diff(1.0000,
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{"L" : 50.0000,
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"a" : 2.5000,
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"b" : 0.0000
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},
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{"L" : 50.0000,
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"a" : 3.2592,
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"b" : 0.3350
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});
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});
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it("should produce numbers found in the CIE technical report (#25)", function(){
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assert_ciede2000_diff(1.2644,
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{"L" : 60.2574,
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"a" : -34.0099,
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"b" : 36.2677
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},
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{"L" : 60.4626,
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"a" : -34.1751,
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"b" : 39.4387
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});
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});
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it("should produce numbers found in the CIE technical report (#26)", function(){
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assert_ciede2000_diff(1.2630,
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{"L" : 63.0109,
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"a" : -31.0961,
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"b" : -5.8663
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},
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{"L" : 62.8187,
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"a" : -29.7946,
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"b" : -4.0864
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});
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});
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it("should produce numbers found in the CIE technical report (#27)", function(){
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assert_ciede2000_diff(1.8731,
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{"L" : 61.2901,
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"a" : 3.7196,
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"b" : -5.3901
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},
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{"L" : 61.4292,
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"a" : 2.2480,
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"b" : -4.9620
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});
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});
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it("should produce numbers found in the CIE technical report (#28)", function(){
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assert_ciede2000_diff(1.8645,
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{"L" : 35.0831,
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"a" : -44.1164,
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"b" : 3.7933
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},
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{"L" : 35.0232,
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"a" : -40.0716,
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"b" : 1.5901
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});
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});
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it("should produce numbers found in the CIE technical report (#29)", function(){
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assert_ciede2000_diff(2.0373,
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{"L" : 22.7233,
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"a" : 20.0904,
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"b" : -46.6940
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},
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{"L" : 23.0331,
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"a" : 14.9730,
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"b" : -42.5619
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});
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});
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it("should produce numbers found in the CIE technical report (#30)", function(){
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assert_ciede2000_diff(1.4146,
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{"L" : 36.4612,
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"a" : 47.8580,
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"b" : 18.3852
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},
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{"L" : 36.2715,
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"a" : 50.5065,
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"b" : 21.2231
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});
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});
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it("should produce numbers found in the CIE technical report (#31)", function(){
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assert_ciede2000_diff(1.4441,
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{"L" : 90.8027,
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"a" : -2.0831,
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"b" : 1.4410
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},
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{"L" : 91.1528,
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"a" : -1.6435,
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"b" : 0.0447
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});
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});
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it("should produce numbers found in the CIE technical report (#32)", function(){
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assert_ciede2000_diff(1.5381,
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{"L" : 90.9257,
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"a" : -0.5406,
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"b" : -0.9208
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},
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{"L" : 88.6381,
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"a" : -0.8985,
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"b" : -0.7239
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});
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});
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it("should produce numbers found in the CIE technical report (#33)", function(){
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assert_ciede2000_diff(0.6377,
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{"L" : 6.7747,
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"a" : -0.2908,
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"b" : -2.4247
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},
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{"L" : 5.8714,
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"a" : -0.0985,
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"b" : -2.2286
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});
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});
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it("should produce numbers found in the CIE technical report (#34)", function(){
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assert_ciede2000_diff(0.9082,
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{"L" : 2.0776,
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"a" : 0.0795,
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"b" : -1.1350
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},
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{"L" : 0.9033,
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"a" : -0.0636,
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"b" : -0.5514
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});
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});
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it("should throw error", function(){
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assert.throws(
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function(){ color_diff.ciede2000({"L" : NaN,
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"a" : NaN,
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"b" : NaN},
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{"L" : 0,
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"a" : 0,
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"b" : 0
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})
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},
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Error)
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});
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})
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});
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/**
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* INTERNAL FUNCTIONS
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*/
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function assert_ciede2000_diff(expected, c1, c2){
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assert.equal(expected, round(color_diff.ciede2000(c1, c2)));
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assert.equal(expected, round(color_diff.ciede2000(c2, c1)));
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}
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function round(n){ return Math.round(n*10000)/10000; }
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// Local Variables:
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// allout-layout: t
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// js-indent-level: 2
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// End:
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