Fix waldboost interface

modules/adas/tools/fcw_detect/fcw_detect.cpp

@@ -82,7 +82,7 @@ int main(int argc, char *argv[])
 
     ICFDetector detector;
     FileStorage fs(model_filename, FileStorage::READ);
-    fs["icfdetector"] >> detector;
+    detector.read(fs["icfdetector"]);
     fs.release();
     vector<Rect> objects;
     Mat img = imread(image_path);

modules/adas/tools/fcw_train/fcw_train.cpp

@@ -94,6 +94,7 @@ int main(int argc, char *argv[])
     ICFDetector detector;
     detector.train(pos_path, bg_path, params);
     FileStorage fs(model_filename, FileStorage::WRITE);
-    fs << "icfdetector" << detector;
+    fs << "icfdetector";
+    detector.write(fs);
     fs.release();
 }

modules/xobjdetect/include/opencv2/xobjdetect.hpp

@@ -128,7 +128,7 @@ public:
     Feature enumeration starts from 0
     */
     virtual std::vector<int> train(const Mat& /*data*/,
-                                   const Mat& /*labels*/) {return std::vector<int>();}
+                                   const Mat& /*labels*/) = 0;
 
     /* Predict object class given object that can compute object features
 
@@ -138,21 +138,15 @@ public:
     is from class +1
     */
     virtual float predict(
-        const Ptr<FeatureEvaluator>& /*feature_evaluator*/) const
-    {return 0.0f;}
+        const Ptr<FeatureEvaluator>& /*feature_evaluator*/) const = 0;
 
     /* Write WaldBoost to FileStorage */
-    virtual void write(FileStorage& /*fs*/) const {}
+    virtual void write(FileStorage& /*fs*/) const = 0;
 
     /* Read WaldBoost */
-    virtual void read(const FileNode& /*node*/) {}
+    virtual void read(const FileNode& /*node*/) = 0;
 };
 
-void write(FileStorage& fs, String&, const WaldBoost& waldboost);
-
-void read(const FileNode& node, WaldBoost& w,
-    const WaldBoost& default_value = WaldBoost());
-
 CV_EXPORTS Ptr<WaldBoost>
 createWaldBoost(const WaldBoostParams& params = WaldBoostParams());
 

modules/xobjdetect/src/icfdetector.cpp

@@ -163,7 +163,8 @@ void ICFDetector::write(FileStorage& fs) const
     fs << "{";
     fs << "model_n_rows" << model_n_rows_;
     fs << "model_n_cols" << model_n_cols_;
-    fs << "waldboost" << *waldboost_;
+    fs << "waldboost";
+    waldboost_->write(fs);
     fs << "features" << "[";
     for( size_t i = 0; i < features_.size(); ++i )
     {
@@ -178,7 +179,7 @@ void ICFDetector::read(const FileNode& node)
     waldboost_ = Ptr<WaldBoost>(createWaldBoost(WaldBoostParams()));
     node["model_n_rows"] >> model_n_rows_;
     node["model_n_cols"] >> model_n_cols_;
-    node["waldboost"] >> *waldboost_;
+    waldboost_->read(node["waldboost"]);
     FileNode features = node["features"];
     features_.clear();
     vector<int> p;