updated docs

docs/docs/imaging.xml

@@ -79,6 +79,7 @@
 
       <section>
          <name>Object Detection</name>
+         <item>get_frontal_face_detector</item>
          <item>object_detector</item>
          <item>full_object_detection</item>
          <item>scan_image</item>
@@ -1879,6 +1880,21 @@
                                  
       </component>
             
+   <!-- ************************************************************************* -->
+
+      <component>
+         <name>get_frontal_face_detector</name>
+         <file>dlib/image_processing/frontal_face_detector.h</file>
+         <spec_file link="true">dlib/image_processing/frontal_face_detector_abstract.h</spec_file>
+         <description>        
+            This function returns an <a href="#object_detector">object_detector</a> that is
+            configured to find human faces that are looking more or less towards the camera.  
+            It is created using the <a href="#scan_fhog_pyramid">scan_fhog_pyramid</a>
+            object.  
+         </description>
+                                 
+      </component>
+            
    <!-- ************************************************************************* -->
 
       <component>

docs/docs/term_index.xml

@@ -1267,6 +1267,7 @@
          <term file="dlib/image_processing/box_overlap_testing_abstract.h.html" name="overlaps_any_box"        include="dlib/image_processing.h"/>
          <term file="imaging.html" name="test_box_overlap"        include="dlib/image_processing.h"/>
          <term file="imaging.html" name="remove_unobtainable_rectangles"        include="dlib/image_processing.h"/>
+         <term file="imaging.html" name="get_frontal_face_detector"         include="dlib/image_processing/frontal_face_detector.h"/>
          <term file="imaging.html" name="object_detector"         include="dlib/image_processing.h"/>
          <term file="imaging.html" name="full_object_detection"   include="dlib/image_processing.h"/>
          <term file="dlib/image_processing/full_object_detection_abstract.h.html" name="all_parts_in_rect" include="dlib/image_processing.h"/>