GH-654: Adding the Distance Transform algorithm.

Sources/Accord.Imaging/AForge.Imaging/UnmanagedImage.cs

@@ -65,15 +65,20 @@ public class UnmanagedImage : IDisposable
     {
         // pointer to image data in unmanaged memory
         private IntPtr imageData;
+
         // image size
         private int width, height;
+
         // image stride (line size)
         private int stride;
+
         // image pixel format
         private PixelFormat pixelFormat;
+
         // flag which indicates if the image should be disposed or not
         private bool mustBeDisposed = false;
 
+
         /// <summary>
         /// Pointer to image data in unmanaged memory.
         /// </summary>
@@ -114,6 +119,15 @@ public PixelFormat PixelFormat
             get { return pixelFormat; }
         }
 
+        /// <summary>
+        /// Gets the image size, in bytes.
+        /// </summary>
+        /// 
+        public int Bytes
+        {
+            get { return stride * height; }
+        }
+
         /// <summary>
         /// Initializes a new instance of the <see cref="UnmanagedImage"/> class.
         /// </summary>
@@ -1112,5 +1126,22 @@ public ushort[] Collect16bppPixelValues(List<IntPoint> points)
 
             return pixelValues;
         }
+
+        /// <summary>
+        ///   Converts the image into a sequence of bytes.
+        /// </summary>
+        /// 
+        public byte[] ToByteArray()
+        {
+            byte[] bytes = new byte[Bytes];
+            unsafe
+            {
+                fixed (byte* dst = bytes)
+                {
+                    Buffer.MemoryCopy(this.imageData.ToPointer(), dst, bytes.Length, bytes.Length);
+                }
+            }
+            return bytes;
+        }
     }
 }

Sources/Accord.Imaging/Accord.Imaging.csproj

@@ -181,6 +181,7 @@
     <Compile Include="AForge.Imaging\Filters\Normalized RGB\ExtractNormalizedRGBChannel.cs" />
     <Compile Include="AForge.Imaging\Filters\Other\ApplyMask.cs" />
     <Compile Include="Blob Processing\IBlobsFilter.cs" />
+    <Compile Include="Filters\DistanceTransform.cs" />
     <Compile Include="Filters\Other\BlobsFiltering.cs" />
     <Compile Include="AForge.Imaging\Filters\Other\CanvasCrop.cs" />
     <Compile Include="AForge.Imaging\Filters\Other\CanvasFill.cs" />