Added InverseContrast to MagickImage.

dlemstra · Jun 12, 2022 · ac10e22 · ac10e22
1 parent 91a9bb6
commit ac10e22
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Showing 5 changed files with 70 additions and 15 deletions.
diff --git a/src/Magick.NET.Core/IMagickImage.cs b/src/Magick.NET.Core/IMagickImage.cs
@@ -1913,6 +1913,12 @@ public partial interface IMagickImage : IDisposable
         /// <exception cref="MagickException">Thrown when an error is raised by ImageMagick.</exception>
         void InterpolativeResize(Percentage percentageWidth, Percentage percentageHeight, PixelInterpolateMethod method);
 
+        /// <summary>
+        /// Inverse contrast image (diminish intensity differences in image).
+        /// </summary>
+        /// <exception cref="MagickException">Thrown when an error is raised by ImageMagick.</exception>
+        void InverseContrast();
+
         /// <summary>
         /// Applies the reversed level operation to just the specific channels specified. It compresses
         /// the full range of color values, so that they lie between the given black and white points.

diff --git a/src/Magick.NET/MagickImage.cs b/src/Magick.NET/MagickImage.cs
@@ -3568,6 +3568,13 @@ public void InterpolativeResize(Percentage percentageWidth, Percentage percentag
             InterpolativeResize(geometry, method);
         }
 
+        /// <summary>
+        /// Inverse contrast image (diminish intensity differences in image).
+        /// </summary>
+        /// <exception cref="MagickException">Thrown when an error is raised by ImageMagick.</exception>
+        public void InverseContrast()
+            => _nativeInstance.Contrast(false);
+
         /// <summary>
         /// Floodfill pixels not matching color (within fuzz factor) of target pixel(x,y) with
         /// replacement alpha value using method.

diff --git a/tests/Magick.NET.Tests/MagickImageTests.cs b/tests/Magick.NET.Tests/MagickImageTests.cs
@@ -443,21 +443,6 @@ public void Test_Constructor()
             Assert.Contains("error/blob.c/OpenBlob", exception.Message);
         }
 
-        [Fact]
-        public void Test_Contrast()
-        {
-            using (var first = new MagickImage(Files.Builtin.Wizard))
-            {
-                first.Contrast(true);
-                first.Contrast(false);
-
-                using (var second = new MagickImage(Files.Builtin.Wizard))
-                {
-                    Assert.InRange(first.Compare(second, ErrorMetric.RootMeanSquared), 0.0031, 0.0034);
-                }
-            }
-        }
-
         [Fact]
         public void Test_ContrastStretch()
         {

diff --git a/tests/Magick.NET.Tests/MagickImageTests/TheContrastMethod.cs b/tests/Magick.NET.Tests/MagickImageTests/TheContrastMethod.cs
@@ -0,0 +1,28 @@
+// Copyright Dirk Lemstra https://github.com/dlemstra/Magick.NET.
+// Licensed under the Apache License, Version 2.0.
+
+using ImageMagick;
+using Xunit;
+
+namespace Magick.NET.Tests
+{
+    public partial class MagickImageTests
+    {
+        public class TheContrastMethod
+        {
+            [Fact]
+            public void ShouldEnhanceTheImage()
+            {
+                using (var first = new MagickImage(Files.Builtin.Wizard))
+                {
+                    first.Contrast();
+
+                    using (var second = new MagickImage(Files.Builtin.Wizard))
+                    {
+                        Assert.InRange(first.Compare(second, ErrorMetric.RootMeanSquared), 0.0174, 0.0175);
+                    }
+                }
+            }
+        }
+    }
+}
diff --git a/tests/Magick.NET.Tests/MagickImageTests/TheInverseContrastMethod.cs b/tests/Magick.NET.Tests/MagickImageTests/TheInverseContrastMethod.cs
@@ -0,0 +1,29 @@
+// Copyright Dirk Lemstra https://github.com/dlemstra/Magick.NET.
+// Licensed under the Apache License, Version 2.0.
+
+using ImageMagick;
+using Xunit;
+
+namespace Magick.NET.Tests
+{
+    public partial class MagickImageTests
+    {
+        public class TheInverseContrastMethod
+        {
+            [Fact]
+            public void ShouldInvertContrast()
+            {
+                using (var first = new MagickImage(Files.Builtin.Wizard))
+                {
+                    first.Contrast();
+                    first.InverseContrast();
+
+                    using (var second = new MagickImage(Files.Builtin.Wizard))
+                    {
+                        Assert.InRange(first.Compare(second, ErrorMetric.RootMeanSquared), 0.0031, 0.0034);
+                    }
+                }
+            }
+        }
+    }
+}