moving FaceRecognizer2 from public header to .cpp

modules/contrib/include/opencv2/contrib/contrib.hpp

@@ -958,26 +958,6 @@ namespace cv
         vector<int> getLabelsByString(const string& str);
     };
 
-    // The FaceRecognizerBase class is introduced to keep the FaceRecognizer binary backward compatibility in 2.4
-    // In master setLabelInfo/getLabelInfo/getLabelsByString should be virtual and _labelsInfo should be moved to FaceRecognizer
-    // that allows to avoid FaceRecognizer2 in master
-    class FaceRecognizer2 : public FaceRecognizer
-    {
-    protected:
-        // Stored pairs "label id - string info"
-        std::map<int, string> _labelsInfo;
-
-    public:
-        // Sets additional information as pairs label - info.
-        virtual void setLabelsInfo(const std::map<int, string>& labelsInfo);
-
-        // Gets string information by label
-        virtual string getLabelInfo(int label) const;
-
-        // Gets labels by string
-        virtual vector<int> getLabelsByString(const string& str);
-    };
-
     CV_EXPORTS_W Ptr<FaceRecognizer> createEigenFaceRecognizer(int num_components = 0, double threshold = DBL_MAX);
     CV_EXPORTS_W Ptr<FaceRecognizer> createFisherFaceRecognizer(int num_components = 0, double threshold = DBL_MAX);
     CV_EXPORTS_W Ptr<FaceRecognizer> createLBPHFaceRecognizer(int radius=1, int neighbors=8,

modules/contrib/src/facerec.cpp

@@ -18,41 +18,6 @@
 #include "precomp.hpp"
 #include <set>
 
-struct LabelInfo
-{
-    LabelInfo():label(-1), value("") {}
-    LabelInfo(int _label, const std::string &_value): label(_label), value(_value) {}
-    int label;
-    std::string value;
-    void write(cv::FileStorage& fs) const
-    {
-        fs << "{" << "label" << label << "value" << value << "}";
-    }
-    void read(const cv::FileNode& node)
-    {
-        label = (int)node["label"];
-        value = (std::string)node["value"];
-    }
-    std::ostream& operator<<(std::ostream& out)
-    {
-        out << "{ label = " << label << ", " << "value = " << value << "}";
-        return out;
-    }
-};
-
-static void write(cv::FileStorage& fs, const std::string&, const LabelInfo& x)
-{
-    x.write(fs);
-}
-
-static void read(const cv::FileNode& node, LabelInfo& x, const LabelInfo& default_value = LabelInfo())
-{
-    if(node.empty())
-        x = default_value;
-    else
-        x.read(node);
-}
-
 namespace cv
 {
 
@@ -133,19 +98,32 @@ inline vector<_Tp> remove_dups(const vector<_Tp>& src) {
     return elems;
 }
 
-void FaceRecognizer2::setLabelsInfo(const std::map<int,string>& labelsInfo)
+// The FaceRecognizer2 class is introduced to keep the FaceRecognizer binary backward compatibility in 2.4
+// In master setLabelInfo/getLabelInfo/getLabelsByString should be virtual and _labelsInfo should be moved
+// to FaceRecognizer, that allows to avoid FaceRecognizer2 in master
+class FaceRecognizer2 : public FaceRecognizer
 {
+protected:
+    // Stored pairs "label id - string info"
+    std::map<int, string> _labelsInfo;
+
+public:
+    // Sets additional information as pairs label - info.
+    virtual void setLabelsInfo(const std::map<int, string>& labelsInfo)
+    {
         _labelsInfo = labelsInfo;
-}
+    }
 
-string FaceRecognizer2::getLabelInfo(int label) const
-{
+    // Gets string information by label
+    virtual string getLabelInfo(int label) const
+    {
         std::map<int, string>::const_iterator iter(_labelsInfo.find(label));
         return iter != _labelsInfo.end() ? iter->second : "";
-}
+    }
 
-vector<int> FaceRecognizer2::getLabelsByString(const string& str)
-{
+    // Gets labels by string
+    virtual vector<int> getLabelsByString(const string& str)
+    {
         vector<int> labels;
         for(std::map<int,string>::const_iterator it = _labelsInfo.begin(); it != _labelsInfo.end(); it++)
         {
@@ -154,8 +132,47 @@ vector<int> FaceRecognizer2::getLabelsByString(const string& str)
                 labels.push_back(it->first);
         }
         return labels;
+    }
+
+};
+
+// Utility structure to load/save face label info (a pair of int and string) via FileStorage
+struct LabelInfo
+{
+    LabelInfo():label(-1), value("") {}
+    LabelInfo(int _label, const std::string &_value): label(_label), value(_value) {}
+    int label;
+    std::string value;
+    void write(cv::FileStorage& fs) const
+    {
+        fs << "{" << "label" << label << "value" << value << "}";
+    }
+    void read(const cv::FileNode& node)
+    {
+        label = (int)node["label"];
+        value = (std::string)node["value"];
+    }
+    std::ostream& operator<<(std::ostream& out)
+    {
+        out << "{ label = " << label << ", " << "value = " << value << "}";
+        return out;
+    }
+};
+
+static void write(cv::FileStorage& fs, const std::string&, const LabelInfo& x)
+{
+    x.write(fs);
+}
+
+static void read(const cv::FileNode& node, LabelInfo& x, const LabelInfo& default_value = LabelInfo())
+{
+    if(node.empty())
+        x = default_value;
+    else
+        x.read(node);
 }
 
+
 // Turk, M., and Pentland, A. "Eigenfaces for recognition.". Journal of
 // Cognitive Neuroscience 3 (1991), 71–86.
 class Eigenfaces : public FaceRecognizer2