Added a typedef to the object_detector that allows you to find out

what scanner type it is using.

dlib/image_processing/object_detector.h

@@ -67,11 +67,12 @@ namespace dlib
 // ----------------------------------------------------------------------------------------
 
     template <
-        typename image_scanner_type
+        typename image_scanner_type_
         >
     class object_detector
     {
     public:
+        typedef image_scanner_type_ image_scanner_type;
         typedef typename image_scanner_type::feature_vector_type feature_vector_type;
 
         object_detector (

dlib/image_processing/object_detector_abstract.h

@@ -30,13 +30,13 @@ namespace dlib
 // ----------------------------------------------------------------------------------------
 
     template <
-        typename image_scanner_type
+        typename image_scanner_type_
         >
     class object_detector
     {
         /*!
-            REQUIREMENTS ON image_scanner_type
-                image_scanner_type must be an implementation of 
+            REQUIREMENTS ON image_scanner_type_
+                image_scanner_type_ must be an implementation of 
                 dlib/image_processing/scan_image_pyramid_abstract.h or 
                 dlib/image_processing/scan_fhog_pyramid.h or 
                 dlib/image_processing/scan_image_custom.h or 
@@ -65,6 +65,7 @@ namespace dlib
                 avoids unnecessarily loading the same image into the scanner multiple times.  
         !*/
     public:
+        typedef image_scanner_type_ image_scanner_type;
         typedef typename image_scanner_type::feature_vector_type feature_vector_type;
 
         object_detector (