コード例 #1
0
    public void ComputeDifference(double a1,
                                  double a2,
                                  double a3,
                                  double b1,
                                  double b2,
                                  double b3,
                                  double expectedDeltaE)
    {
        // arrange
        var x = new RGBColor(in a1, in a2, in a3);
        var y = new RGBColor(in b1, in b2, in b3);

        // act
        var deltaE = new EuclideanDistanceColorDifference <RGBColor>().ComputeDifference(in x, in y);

        // assert
        Assert.Equal(expectedDeltaE, deltaE, DoubleComparerLabRounding);
    }
コード例 #2
0
    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);
        }
    }