public void CMCColorDifference(double l1, double a1, double b1, double l2, double a2, double b2, double expectedDeltaE_imperceptibility, double expectedDeltaE_acceptability) { // arrange var x = new LabColor(l1, a1, b1); var y = new LabColor(l2, a2, b2); // act var deltaE_imperceptibility = new CMCColorDifference(CMCColorDifferenceThreshold.Imperceptibility).ComputeDifference(x, y); var deltaE_acceptability = new CMCColorDifference(CMCColorDifferenceThreshold.Acceptability).ComputeDifference(x, y); // assert Assert.Equal(deltaE_imperceptibility, expectedDeltaE_imperceptibility, DoubleComparerLabPrecision); Assert.Equal(deltaE_acceptability, expectedDeltaE_acceptability, DoubleComparerLabPrecision); }
public void ComputingColorDifference() { // CIE Delta-E 1976 { var differenceCalculator = new CIE76ColorDifference(); var labColor1 = new LabColor(55, 80, 50); var labColor2 = new LabColor(18, 36, -60); var difference = differenceCalculator.ComputeDifference(in labColor1, in labColor2); // 124.1169 Assert.Equal(124.11688039908189, difference); } // CMC l:c 1984 { var differenceThreshold = CMCColorDifferenceThreshold.Acceptability; // or "Imperceptibility" var differenceCalculator = new CMCColorDifference(differenceThreshold); var labColor1 = new LabColor(55, 80, 50); var labColor2 = new LabColor(18, 36, -60); var difference = differenceCalculator.ComputeDifference(in labColor1, in labColor2); // 69.7388 Assert.Equal(69.7387994508022, difference); } // CIE Delta-E 1994 { var application = CIE94ColorDifferenceApplication.GraphicArts; // or "Textiles" var differenceCalculator = new CIE94ColorDifference(application); var labColor1 = new LabColor(55, 80, 50); var labColor2 = new LabColor(18, 36, -60); var difference = differenceCalculator.ComputeDifference(in labColor1, in labColor2); // 60.7882 Assert.Equal(60.78823549707133, difference); } // CIE Delta-E 2000 { var differenceCalculator = new CIEDE2000ColorDifference(); var labColor1 = new LabColor(55, 80, 50); var labColor2 = new LabColor(18, 36, -60); var difference = differenceCalculator.ComputeDifference(in labColor1, in labColor2); // 52.2320 Assert.Equal(52.23202852556586, difference); } // Delta Ez { var differenceCalculator = new JzCzhzDEzColorDifference(); var color1 = new JzCzhzColor(0.3, 0.4, 165); var color2 = new JzCzhzColor(0.8, 0.6, 25); var difference = differenceCalculator.ComputeDifference(in color1, in color2); // 1.0666 Assert.Equal(1.066630832433185, difference); } // Euclidean distance { // example for euclidean distance in the XYZ color space var differenceCalculator = new EuclideanDistanceColorDifference <XYZColor>(); var color1 = new XYZColor(0.5, 0.5, 0.5); var color2 = new XYZColor(0.2, 0.4, 0.6); var difference = differenceCalculator.ComputeDifference(in color1, in color2); // 0.3317 Assert.Equal(0.33166247903553997, difference); } }
public void CMCColorDifference(double l1, double a1, double b1, double l2, double a2, double b2, double expectedDeltaE_imperceptibility, double expectedDeltaE_acceptability) { // arrange var x = new LabColor(l1, a1, b1); var y = new LabColor(l2, a2, b2); // act double deltaE_imperceptibility = new CMCColorDifference(CMCColorDifferenceThreshold.Imperceptibility).ComputeDifference(x, y); double deltaE_acceptability = new CMCColorDifference(CMCColorDifferenceThreshold.Acceptability).ComputeDifference(x, y); // assert Assert.That(deltaE_imperceptibility, Is.EqualTo(expectedDeltaE_imperceptibility).Using(DoubleComparerLabPrecision)); Assert.That(deltaE_acceptability, Is.EqualTo(expectedDeltaE_acceptability).Using(DoubleComparerLabPrecision)); }