Fixes issue #55

Former-commit-id: eac31cce528fb55ee6c7fb99707b6c274e7c0af5

src/ImageProcessor/ImageFactory.cs

@@ -449,7 +449,7 @@ namespace ImageProcessor
         {
             if (this.ShouldProcess)
             {
-                CropLayer cropLayer = new CropLayer(rectangle.Left, rectangle.Top, rectangle.Right, rectangle.Bottom, CropMode.Pixels);
+                CropLayer cropLayer = new CropLayer(rectangle.Left, rectangle.Top, rectangle.Width, rectangle.Height, CropMode.Pixels);
                 return this.Crop(cropLayer);
             }