Changed code to avoid compiler warnings. Also added support for the

difficult, truncated, and occluded metadata fields of the pascal datasets.

tools/imglab/src/convert_pascal_v1.cpp

@@ -76,9 +76,9 @@ namespace
                 }
                 else if (words.size() > 4 && (words[2] == "for" || words[2] == "on") && words[3] == "object")
                 {
-                    int idx = sa = words[4];
+                    long idx = sa = words[4];
                     --idx;
-                    if (idx >= img.boxes.size())
+                    if (idx >= (long)img.boxes.size())
                         throw dlib::error("Invalid object id number of " + words[4]);
 
                     if (words[0] == "Center" && words[1] == "point" && words.size() > 9)

tools/imglab/src/convert_pascal_xml.cpp

@@ -49,9 +49,9 @@ namespace
         }
 
         virtual void start_element ( 
-            const unsigned long line_number,
+            const unsigned long ,
             const std::string& name,
-            const dlib::attribute_list& atts
+            const dlib::attribute_list& 
         )
         {
             if (ts.size() == 0 && name != "annotation") 
@@ -66,7 +66,7 @@ namespace
         }
 
         virtual void end_element ( 
-            const unsigned long line_number,
+            const unsigned long ,
             const std::string& name
         )
         {
@@ -106,6 +106,39 @@ namespace
                 {
                     temp_box.label = trim(data);
                 }
+                else if (ts.back() == "difficult" && ts[ts.size()-2] == "object")
+                {
+                    if (trim(data) == "0" || trim(data) == "false")
+                    {
+                        temp_box.difficult = false;
+                    }
+                    else
+                    {
+                        temp_box.difficult = true;
+                    }
+                }
+                else if (ts.back() == "truncated" && ts[ts.size()-2] == "object")
+                {
+                    if (trim(data) == "0" || trim(data) == "false")
+                    {
+                        temp_box.truncated = false;
+                    }
+                    else
+                    {
+                        temp_box.truncated = true;
+                    }
+                }
+                else if (ts.back() == "occluded" && ts[ts.size()-2] == "object")
+                {
+                    if (trim(data) == "0" || trim(data) == "false")
+                    {
+                        temp_box.occluded = false;
+                    }
+                    else
+                    {
+                        temp_box.occluded = true;
+                    }
+                }
 
             }
         }

tools/imglab/src/image_dataset_metadata.cpp

@@ -70,6 +70,12 @@ namespace dlib
                                  << "left='" << b.rect.left() << "' "
                                 << "width='" << b.rect.width() << "' "
                                << "height='" << b.rect.height() << "'";
+                    if (b.difficult)
+                        fout << " difficult='" << b.difficult << "'";
+                    if (b.truncated)
+                        fout << " truncated='" << b.truncated << "'";
+                    if (b.occluded)
+                        fout << " occluded='" << b.occluded << "'";
 
                     if (b.has_label() || b.has_head())
                     {
@@ -135,7 +141,7 @@ namespace dlib
             }
 
             virtual void start_element ( 
-                const unsigned long line_number,
+                const unsigned long ,
                 const std::string& name,
                 const dlib::attribute_list& atts
             )
@@ -170,6 +176,10 @@ namespace dlib
                     if (atts.is_in_list("height")) temp_box.rect.bottom() = sa = atts["height"];
                     else throw dlib::error("<box> missing required attribute 'height'");
 
+                    if (atts.is_in_list("difficult")) temp_box.difficult = sa = atts["difficult"];
+                    if (atts.is_in_list("truncated")) temp_box.truncated = sa = atts["truncated"];
+                    if (atts.is_in_list("occluded"))  temp_box.occluded  = sa = atts["occluded"];
+
                     temp_box.rect.bottom() += temp_box.rect.top()-1;
                     temp_box.rect.right() += temp_box.rect.left()-1;
                 }
@@ -193,7 +203,7 @@ namespace dlib
             }
 
             virtual void end_element ( 
-                const unsigned long line_number,
+                const unsigned long ,
                 const std::string& name
             )
             {

tools/imglab/src/image_dataset_metadata.h

@@ -15,13 +15,22 @@ namespace dlib
     {
         struct box
         {
-            box() : head(-0xFFFF,-0xFFFF) {}
+            box(
+            ) : 
+                head(-0xFFFF,-0xFFFF), 
+                difficult(false),
+                truncated(false),
+                occluded(false)
+            {}
 
             rectangle rect;
 
             // optional fields
             std::string label;
             point head; // a value of (-0xFFFF,-0xFFFF) indicates the field not supplied
+            bool difficult;
+            bool truncated;
+            bool occluded;
 
             bool has_head() const { return head != point(-0xFFFF,-0xFFFF); }
             bool has_label() const { return label.size() != 0; }