Detect edges

tests/ImageSharp.Tests/Processing/Convolution/DetectEdgesTest.cs

@@ -0,0 +1,62 @@
+// <copyright file="DetectEdgesTest.cs" company="James Jackson-South">
+// Copyright (c) James Jackson-South and contributors.
+// Licensed under the Apache License, Version 2.0.
+// </copyright>
+
+namespace ImageSharp.Tests.Processing.Convolution
+{
+    using ImageSharp.PixelFormats;
+    using ImageSharp.Processing;
+
+    using Xunit;
+
+    public class DetectEdgesTest : FileTestBase
+    {
+        public static readonly TheoryData<EdgeDetection> DetectEdgesFilters
+        = new TheoryData<EdgeDetection>
+        {
+            EdgeDetection.Kayyali,
+            EdgeDetection.Kirsch,
+            EdgeDetection.Lapacian3X3,
+            EdgeDetection.Lapacian5X5,
+            EdgeDetection.LaplacianOfGaussian,
+            EdgeDetection.Prewitt,
+            EdgeDetection.RobertsCross,
+            EdgeDetection.Robinson,
+            EdgeDetection.Scharr,
+            EdgeDetection.Sobel
+        };
+
+        [Theory]
+        [WithFileCollection(nameof(AllBmpFiles), nameof(DetectEdgesFilters), StandardPixelTypes)]
+        public void ImageShouldApplyDetectEdgesFilter<TPixel>(TestImageProvider<TPixel> provider, EdgeDetection detector)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> image = provider.GetImage())
+            {
+                image.DetectEdges(detector)
+                    .DebugSave(provider, detector.ToString(), Extensions.Bmp);
+            }
+        }
+
+        [Theory]
+        [WithFileCollection(nameof(AllBmpFiles), nameof(DetectEdgesFilters), StandardPixelTypes)]
+        public void ImageShouldApplyDetectEdgesFilterInBox<TPixel>(TestImageProvider<TPixel> provider, EdgeDetection detector)
+            where TPixel : struct, IPixel<TPixel>
+        {
+            using (Image<TPixel> source = provider.GetImage())
+            using (var image = new Image<TPixel>(source))
+            {
+                var bounds = new Rectangle(10, 10, image.Width / 2, image.Height / 2);
+
+                image.DetectEdges(detector, bounds)
+                    .DebugSave(provider, detector.ToString(), Extensions.Bmp);
+
+                // Draw identical shapes over the bounded and compare to ensure changes are constrained.
+                image.Fill(NamedColors<TPixel>.HotPink, bounds);
+                source.Fill(NamedColors<TPixel>.HotPink, bounds);
+                ImageComparer.CheckSimilarity(image, source);
+            }
+        }
+    }
+}

tests/ImageSharp.Tests/Processors/Filters/DetectEdgesTest.cs

@@ -1,67 +0,0 @@
-// <copyright file="DetectEdgesTest.cs" company="James Jackson-South">
-// Copyright (c) James Jackson-South and contributors.
-// Licensed under the Apache License, Version 2.0.
-// </copyright>
-
-namespace ImageSharp.Tests
-{
-    using ImageSharp.Processing;
-    using System.IO;
-
-    using ImageSharp.PixelFormats;
-
-    using Xunit;
-
-    public class DetectEdgesTest : FileTestBase
-    {
-        public static readonly TheoryData<EdgeDetection> DetectEdgesFilters
-        = new TheoryData<EdgeDetection>
-        {
-            EdgeDetection.Kayyali,
-            EdgeDetection.Kirsch,
-            EdgeDetection.Lapacian3X3,
-            EdgeDetection.Lapacian5X5,
-            EdgeDetection.LaplacianOfGaussian,
-            EdgeDetection.Prewitt,
-            EdgeDetection.RobertsCross,
-            EdgeDetection.Robinson,
-            EdgeDetection.Scharr,
-            EdgeDetection.Sobel
-        };
-
-        [Theory]
-        [MemberData(nameof(DetectEdgesFilters))]
-        public void ImageShouldApplyDetectEdgesFilter(EdgeDetection detector)
-        {
-            string path = this.CreateOutputDirectory("DetectEdges");
-
-            foreach (TestFile file in Files)
-            {
-                string filename = file.GetFileName(detector);
-                using (Image<Rgba32> image = file.CreateImage())
-                using (FileStream output = File.OpenWrite($"{path}/{filename}"))
-                {
-                    image.DetectEdges(detector).Save(output);
-                }
-            }
-        }
-
-        [Theory]
-        [MemberData(nameof(DetectEdgesFilters))]
-        public void ImageShouldApplyDetectEdgesFilterInBox(EdgeDetection detector)
-        {
-            string path = this.CreateOutputDirectory("DetectEdges");
-
-            foreach (TestFile file in Files)
-            {
-                string filename = file.GetFileName(detector + "-InBox");
-                using (Image<Rgba32> image = file.CreateImage())
-                using (FileStream output = File.OpenWrite($"{path}/{filename}"))
-                {
-                    image.DetectEdges(detector, new Rectangle(image.Width / 4, image.Height / 4, image.Width / 2, image.Height / 2))
-                         .Save(output);
-                }
-            }
-        }
-    }
-}