updated docs

docs/docs/imaging.xml

@@ -161,6 +161,7 @@
 
       <section>
          <name>Scaling and Rotating</name>
+         <item>pyramid_up</item> 
          <item>pyramid_down</item> 
          <item>pyramid_down_3_2</item> 
          <item>pyramid_down_4_3</item> 
@@ -1232,6 +1233,20 @@
          </description>
       </component>
 
+   <!-- ************************************************************************* -->
+      
+      <component>
+         <name>pyramid_up</name>
+         <file>dlib/image_transforms.h</file>
+         <spec_file link="true">dlib/image_transforms/interpolation_abstract.h</spec_file>
+         <description>        
+            This routine upsamples an image.  In particular, it takes one of the
+            <a href="#pyramid_down">pyramid_down</a> objects as an argument and
+            performs an upsampling which is the inverse of the supplied pyramid_down
+            object.
+         </description>
+      </component>
+
    <!-- ************************************************************************* -->
       
       <component>

docs/docs/term_index.xml

@@ -1074,6 +1074,7 @@
          <term file="imaging.html" name="transform_image"/>
          <term file="imaging.html" name="rotate_image"/>
          <term file="imaging.html" name="resize_image"/>
+         <term file="imaging.html" name="pyramid_up"/>
          <term file="imaging.html" name="flip_image_left_right"/>
          <term file="imaging.html" name="flip_image_up_down"/>
          <term file="dlib/image_transforms/interpolation_abstract.h.html" name="black_background"/>