Added more versioning information into the serialization methods for

these objects.

dlib/image_processing/object_detector.h

@@ -127,6 +127,9 @@ namespace dlib
         std::ostream& out
     )
     {
+        int version = 1;
+        serialize(version, out);
+
         T scanner;
         scanner.copy_configuration(item.scanner);
         serialize(scanner, out);
@@ -142,6 +145,11 @@ namespace dlib
         std::istream& in 
     )
     {
+        int version = 0;
+        deserialize(version, in);
+        if (version != 1)
+            throw serialization_error("Unexpected version encountered while deserializing a dlib::object_detector object.");
+
         deserialize(item.scanner, in);
         deserialize(item.w, in);
         deserialize(item.boxes_overlap, in);

dlib/image_processing/scan_image_pyramid.h

@@ -152,12 +152,19 @@ namespace dlib
 
         friend void serialize(const detection_template& item, std::ostream& out)
         {
+            int version = 1;
+            serialize(version, out);
             serialize(item.object_box, out);
             serialize(item.rects, out);
             serialize(item.movable_rects, out);
         }
         friend void deserialize(detection_template& item, std::istream& in)
         {
+            int version = 0;
+            deserialize(version, in);
+            if (version != 1)
+                throw serialization_error("Unexpected version found while deserializing a dlib::scan_image_pyramid::detection_template object.");
+
             deserialize(item.object_box, in);
             deserialize(item.rects, in);
             deserialize(item.movable_rects, in);