link Wiki page

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@52528 15284696-431f-4ddb-bdfa-cd5b030d7da7

imagery/imageryintro.html

@@ -147,6 +147,7 @@ be calculated.
 <h3>See also</h3>
 
 <ul>
+<li> GRASS GIS Wiki page: <a href="http://grass.osgeo.org/wiki/Image_processing">Image processing</a></li>
 <li>The GRASS 4 
     <em><a href="http://grass.osgeo.org/gdp/imagery/grass4_image_processing.pdf">Image
      Processing manual</A></em></li>