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diff --git a/boost/gil/extension/toolbox/metafunctions/channel_view.hpp b/boost/gil/extension/toolbox/metafunctions/channel_view.hpp
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+/*
+    Copyright 2010 Fabien Castan, Christian Henning
+    Use, modification and distribution are subject to the Boost Software License,
+    Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+    http://www.boost.org/LICENSE_1_0.txt).
+*/
+
+/*************************************************************************************************/
+
+#ifndef BOOST_GIL_EXTENSION_TOOLBOX_CHANNEL_VIEW_HPP_INCLUDED
+#define BOOST_GIL_EXTENSION_TOOLBOX_CHANNEL_VIEW_HPP_INCLUDED
+
+////////////////////////////////////////////////////////////////////////////////////////
+/// \file channel_view.hpp
+/// \brief Helper to generate channel_view type.
+/// \author Fabien Castan, Christian Henning \n
+///
+/// \date   2010 \n
+///
+////////////////////////////////////////////////////////////////////////////////////////
+
+#include <boost/gil/image_view_factory.hpp>
+
+namespace boost {
+namespace gil {
+
+template < typename Channel
+         , typename View
+         >
+struct channel_type_to_index
+{
+    static const int value = detail::type_to_index< typename color_space_type< View >::type // color (mpl::vector)
+                                                  , Channel                                 // channel type
+                                                  >::type::value;                           //< index of the channel in the color (mpl::vector)
+};
+
+template< typename Channel
+        , typename View
+        >
+struct channel_view_type : public kth_channel_view_type< channel_type_to_index< Channel
+                                                                              , View
+                                                                              >::value
+                                                       , View
+                                                       >
+{
+    static const int index = channel_type_to_index< Channel
+                                                  , View
+                                                  >::value;
+                                                  
+    typedef kth_channel_view_type< index
+                                 , View
+                                 > parent_t;
+
+    typedef typename parent_t::type type;
+
+
+    static type make( const View& src )
+    {
+        return parent_t::make( src );
+    }
+};
+
+/// \ingroup ImageViewTransformationsKthChannel
+template< typename Channel
+        , typename View
+        >
+typename channel_view_type< Channel
+                          , View
+                          >::type channel_view( const View& src )
+{
+   return channel_view_type< Channel
+                           , View
+                           >::make( src );
+}
+
+} // namespace gil
+} // namespace boost
+
+#endif // BOOST_GIL_EXTENSION_TOOLBOX_CHANNEL_VIEW_HPP_INCLUDED