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73 lines
3.0 KiB
73 lines
3.0 KiB
// Copyright (c) Six Labors and contributors.
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// Licensed under the Apache License, Version 2.0.
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using System.Collections.Generic;
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using SixLabors.ImageSharp.ColorSpaces;
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using SixLabors.ImageSharp.ColorSpaces.Conversion;
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using Xunit;
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namespace SixLabors.ImageSharp.Tests.Colorspaces
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{
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/// <summary>
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/// Tests <see cref="CieXyz"/>-<see cref="CieLuv"/> conversions.
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/// </summary>
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/// <remarks>
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/// Test data generated using:
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/// <see href="http://www.brucelindbloom.com/index.html?ColorCalculator.html"/>
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/// </remarks>
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public class CieXyzAndCieLuvConversionTest
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{
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private static readonly IEqualityComparer<float> FloatRoundingComparer = new FloatRoundingComparer(4);
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/// <summary>
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/// Tests conversion from <see cref="CieLuv"/> to <see cref="CieXyz"/> (<see cref="Illuminants.D65"/>).
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/// </summary>
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[Theory]
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[InlineData(0, 0, 0, 0, 0, 0)]
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[InlineData(0, 100, 50, 0, 0, 0)]
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[InlineData(0.1, 100, 50, 0.000493, 0.000111, 0)]
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[InlineData(70.0000, 86.3525, 2.8240, 0.569310, 0.407494, 0.365843)]
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[InlineData(10.0000, -1.2345, -10.0000, 0.012191, 0.011260, 0.025939)]
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[InlineData(100, 0, 0, 0.950470, 1.000000, 1.088830)]
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[InlineData(1, 1, 1, 0.001255, 0.001107, 0.000137)]
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public void Convert_Luv_to_Xyz(float l, float u, float v, float x, float y, float z)
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{
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// Arrange
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var input = new CieLuv(l, u, v, Illuminants.D65);
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var converter = new ColorSpaceConverter { WhitePoint = Illuminants.D65, TargetLabWhitePoint = Illuminants.D65 };
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// Act
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CieXyz output = converter.ToCieXyz(input);
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// Assert
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Assert.Equal(x, output.X, FloatRoundingComparer);
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Assert.Equal(y, output.Y, FloatRoundingComparer);
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Assert.Equal(z, output.Z, FloatRoundingComparer);
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}
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/// <summary>
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/// Tests conversion from <see cref="CieXyz"/> (<see cref="Illuminants.D65"/>) to <see cref="CieLuv"/>.
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/// </summary>
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[Theory]
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[InlineData(0, 0, 0, 0, 0, 0)]
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[InlineData(0.000493, 0.000111, 0, 0.1003, 0.9332, -0.0070)]
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[InlineData(0.569310, 0.407494, 0.365843, 70.0000, 86.3524, 2.8240)]
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[InlineData(0.012191, 0.011260, 0.025939, 9.9998, -1.2343, -9.9999)]
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[InlineData(0.950470, 1.000000, 1.088830, 100, 0, 0)]
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[InlineData(0.001255, 0.001107, 0.000137, 0.9999, 0.9998, 1.0004)]
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public void Convert_Xyz_to_Luv(float x, float y, float z, float l, float u, float v)
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{
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// Arrange
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var input = new CieXyz(x, y, z);
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var converter = new ColorSpaceConverter { WhitePoint = Illuminants.D65, TargetLabWhitePoint = Illuminants.D65 };
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// Act
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CieLuv output = converter.ToCieLuv(input);
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// Assert
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Assert.Equal(l, output.L, FloatRoundingComparer);
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Assert.Equal(u, output.U, FloatRoundingComparer);
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Assert.Equal(v, output.V, FloatRoundingComparer);
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}
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}
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}
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