Merge pull request #2125 from justingruenberg/GH-1974

SusanCornersDetector: Each constructor results in different SupportedFormats

Author: cesarsouza

Sources/Accord.Imaging/AForge.Imaging/SusanCornersDetector.cs

@@ -155,7 +155,7 @@ public SusanCornersDetector()
         /// <param name="differenceThreshold">Brightness difference threshold.</param>
         /// <param name="geometricalThreshold">Geometrical threshold.</param>
         /// 
-        public SusanCornersDetector(int differenceThreshold, int geometricalThreshold)
+        public SusanCornersDetector(int differenceThreshold, int geometricalThreshold) : this()
         {
             this.differenceThreshold = differenceThreshold;
             this.geometricalThreshold = geometricalThreshold;

Unit Tests/Accord.Tests.Imaging/Accord.Tests.Imaging.csproj

@@ -117,6 +117,7 @@
     <Compile Include="Filters\RobinsonEdgeDetectorTest.cs" />
     <Compile Include="SpeededUpRobustFeaturesDescriptorTest.cs" />
     <Compile Include="SpeededUpRobustFeaturesDetectorTest.cs" />
+    <Compile Include="SusanCornersDetectorTests.cs" />
     <Compile Include="TestUtils.cs" />
     <Compile Include="ToolsTest.cs" />
     <Compile Include="Filters\WaveletTransformTest.cs" />

Unit Tests/Accord.Tests.Imaging/SusanCornersDetectorTests.cs

@@ -0,0 +1,50 @@
+// Accord Unit Tests
+// The Accord.NET Framework
+// http://accord-framework.net
+//
+// Copyright © César Souza, 2009-2017
+// cesarsouza at gmail.com
+//
+//    This library is free software; you can redistribute it and/or
+//    modify it under the terms of the GNU Lesser General Public
+//    License as published by the Free Software Foundation; either
+//    version 2.1 of the License, or (at your option) any later version.
+//
+//    This library is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+//    Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public
+//    License along with this library; if not, write to the Free Software
+//    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+//
+
+namespace Accord.Tests.Imaging
+{
+    using Accord.Imaging;
+    using Accord.Tests.Imaging.Properties;
+    using AForge;
+    using NUnit.Framework;
+    using System.Collections.Generic;
+    using System.Drawing;
+
+    [TestFixture]
+    public class SusanCornersDetectorTests
+    {
+        [Test]
+        public void Can_Process_8bpp()
+        {
+            // test for #1974
+
+            UnmanagedImage image = UnmanagedImage.FromManagedImage(Accord.Imaging.Image.Clone(Resources.image1));
+
+            Assert.AreEqual(System.Drawing.Imaging.PixelFormat.Format8bppIndexed, image.PixelFormat);
+
+            SusanCornersDetector detector = new SusanCornersDetector(25, 18);
+
+            // this shouldn't throw
+            var points = detector.ProcessImage(image);
+        }
+    }
+}