minor code cleanup

dlib/image_transforms/segment_image.h

@@ -125,8 +125,6 @@ namespace dlib
 
     // ------------------------------------------------------------------------------------
 
-        namespace impl
-        {
         template <typename image_view_type>
         struct uint8_or_uint16_pixels
         {
@@ -134,13 +132,12 @@ namespace dlib
             const static bool value = is_same_type<pixel_type,uint8>::value ||
                 is_same_type<pixel_type,uint16>::value;
         };
-        }
 
         // This is an overload of get_pixel_edges() that is optimized to segment images
         // with 8bit or 16bit  pixels very quickly.  We do this by using a radix sort
         // instead of quicksort.
         template <typename in_image_type, typename T>
-        typename enable_if<impl::uint8_or_uint16_pixels<in_image_type> >::type 
+        typename enable_if<uint8_or_uint16_pixels<in_image_type> >::type 
         get_pixel_edges (
             const in_image_type& in_img,
             std::vector<segment_image_edge_data_T<T> >& sorted_edges
@@ -253,7 +250,7 @@ namespace dlib
 
         // This is the general purpose version of get_pixel_edges().  It handles all pixel types.
         template <typename in_image_type, typename T>
-        typename disable_if<impl::uint8_or_uint16_pixels<in_image_type> >::type 
+        typename disable_if<uint8_or_uint16_pixels<in_image_type> >::type 
         get_pixel_edges (
             const in_image_type& in_img,
             std::vector<segment_image_edge_data_T<T> >& sorted_edges