diff --git a/config/Doxyfile b/config/Doxyfile
index cddbcc2e..82ed179e 100644
--- a/config/Doxyfile
+++ b/config/Doxyfile
@@ -1,4 +1,4 @@
-# Doxyfile 1.4.6
+# Doxyfile 1.4.7
 
 # This file describes the settings to be used by the documentation system
 # doxygen (www.doxygen.org) for a project
@@ -586,6 +586,13 @@ REFERENCED_BY_RELATION = YES
 
 REFERENCES_RELATION    = YES
 
+# If the REFERENCES_LINK_SOURCE tag is set to YES (the default)
+# and SOURCE_BROWSER tag is set to YES, then the hyperlinks from
+# functions in REFERENCES_RELATION and REFERENCED_BY_RELATION lists will
+# link to the source code.  Otherwise they will link to the documentstion.
+
+REFERENCES_LINK_SOURCE = YES
+
 # If the USE_HTAGS tag is set to YES then the references to source code 
 # will point to the HTML generated by the htags(1) tool instead of doxygen 
 # built-in source browser. The htags tool is part of GNU's global source 
@@ -1148,6 +1155,14 @@ INCLUDED_BY_GRAPH      = YES
 
 CALL_GRAPH             = NO
 
+# If the CALLER_GRAPH and HAVE_DOT tags are set to YES then doxygen will 
+# generate a caller dependency graph for every global function or class method. 
+# Note that enabling this option will significantly increase the time of a run. 
+# So in most cases it will be better to enable caller graphs for selected 
+# functions only using the \callergraph command.
+
+CALLER_GRAPH           = NO
+
 # If the GRAPHICAL_HIERARCHY and HAVE_DOT tags are set to YES then doxygen 
 # will graphical hierarchy of all classes instead of a textual one.
 
@@ -1239,4 +1254,4 @@ DOT_CLEANUP            = YES
 # The SEARCHENGINE tag specifies whether or not a search engine should be 
 # used. If set to NO the values of all tags below this one will be ignored.
 
-SEARCHENGINE           = NO
+SEARCHENGINE           = YES
diff --git a/src/crwimage.cpp b/src/crwimage.cpp
index ed63b982..982a7c3a 100644
--- a/src/crwimage.cpp
+++ b/src/crwimage.cpp
@@ -73,7 +73,9 @@ namespace {
     //! Helper class to map Exif orientation values to CRW rotation degrees
     class RotationMap {
     public:
+        //! Get the orientation number for a degree value
         static uint16_t orientation(int32_t degrees);
+        //! Get the degree value for an orientation number
         static int32_t  degrees(uint16_t orientation);
     private:
         // DATA