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+/*M///////////////////////////////////////////////////////////////////////////////////////
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+ //                           License Agreement
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+
+#ifndef __OPENCV_TRACKING_LENLEN_HPP__
+#define __OPENCV_TRACKING_LENLEN_HPP__
+
+#include "opencv2/core/cvdef.h"
+
+/** @defgroup tracking Tracking API
+
+Long-term optical tracking API
+------------------------------
+
+Long-term optical tracking is one of most important issue for many computer vision applications in
+real world scenario. The development in this area is very fragmented and this API is an unique
+interface useful for plug several algorithms and compare them. This work is partially based on
+@cite AAM and @cite AMVOT .
+
+This algorithms start from a bounding box of the target and with their internal representation they
+avoid the drift during the tracking. These long-term trackers are able to evaluate online the
+quality of the location of the target in the new frame, without ground truth.
+
+There are three main components: the TrackerSampler, the TrackerFeatureSet and the TrackerModel. The
+first component is the object that computes the patches over the frame based on the last target
+location. The TrackerFeatureSet is the class that manages the Features, is possible plug many kind
+of these (HAAR, HOG, LBP, Feature2D, etc). The last component is the internal representation of the
+target, it is the appearence model. It stores all state candidates and compute the trajectory (the
+most likely target states). The class TrackerTargetState represents a possible state of the target.
+The TrackerSampler and the TrackerFeatureSet are the visual representation of the target, instead
+the TrackerModel is the statistical model.
+
+A recent benchmark between these algorithms can be found in @cite OOT
+
+To see how API works, try tracker demo:
+<https://github.com/lenlen/opencv/blob/tracking_api/samples/cpp/tracker.cpp>
+
+Creating Own Tracker
+--------------------
+
+If you want create a new tracker, here's what you have to do. First, decide on the name of the class
+for the tracker (to meet the existing style, we suggest something with prefix "tracker", e.g.
+trackerMIL, trackerBoosting) -- we shall refer to this choice as to "classname" in subsequent. Also,
+you should decide upon the name of the tracker, is it will be known to user (the current style
+suggests using all capitals, say MIL or BOOSTING) --we'll call it a "name".
+
+-   Declare your tracker in include/opencv2/tracking/tracker.hpp. Your tracker should inherit from
+    Tracker (please, see the example below). You should declare the specialized Param structure,
+    where you probably will want to put the data, needed to initialize your tracker. Also don't
+    forget to put the BOILERPLATE_CODE(name,classname) macro inside the class declaration. That
+    macro will generate static createTracker() function, which we'll talk about later. You should
+    get something similar to :
+@code
+        class CV_EXPORTS_W TrackerMIL : public Tracker
+        {
+         public:
+          struct CV_EXPORTS Params
+          {
+            Params();
+            //parameters for sampler
+            float samplerInitInRadius;  // radius for gathering positive instances during init
+            int samplerInitMaxNegNum;  // # negative samples to use during init
+            float samplerSearchWinSize;  // size of search window
+            float samplerTrackInRadius;  // radius for gathering positive instances during tracking
+            int samplerTrackMaxPosNum;  // # positive samples to use during tracking
+            int samplerTrackMaxNegNum;  // # negative samples to use during tracking
+            int featureSetNumFeatures;  // #features
+
+            void read( const FileNode& fn );
+            void write( FileStorage& fs ) const;
+          };
+@endcode
+    of course, you can also add any additional methods of your choice. It should be pointed out,
+    however, that it is not expected to have a constructor declared, as creation should be done via
+    the corresponding createTracker() method.
+-   In src/tracker.cpp file add BOILERPLATE_CODE(name,classname) line to the body of
+    Tracker::create() method you will find there, like :
+@code
+        Ptr<Tracker> Tracker::create( const String& trackerType )
+        {
+          BOILERPLATE_CODE("BOOSTING",TrackerBoosting);
+          BOILERPLATE_CODE("MIL",TrackerMIL);
+          return Ptr<Tracker>();
+        }
+@endcode
+-   Finally, you should implement the function with signature :
+@code
+        Ptr<classname> classname::createTracker(const classname::Params &parameters){
+            ...
+        }
+@endcode
+    That function can (and probably will) return a pointer to some derived class of "classname",
+    which will probably have a real constructor.
+
+Every tracker has three component TrackerSampler, TrackerFeatureSet and TrackerModel. The first two
+are instantiated from Tracker base class, instead the last component is abstract, so you must
+implement your TrackerModel.
+
+### TrackerSampler
+
+TrackerSampler is already instantiated, but you should define the sampling algorithm and add the
+classes (or single class) to TrackerSampler. You can choose one of the ready implementation as
+TrackerSamplerCSC or you can implement your sampling method, in this case the class must inherit
+TrackerSamplerAlgorithm. Fill the samplingImpl method that writes the result in "sample" output
+argument.
+
+Example of creating specialized TrackerSamplerAlgorithm TrackerSamplerCSC : :
+@code
+    class CV_EXPORTS_W TrackerSamplerCSC : public TrackerSamplerAlgorithm
+    {
+     public:
+      TrackerSamplerCSC( const TrackerSamplerCSC::Params &parameters = TrackerSamplerCSC::Params() );
+      ~TrackerSamplerCSC();
+      ...
+
+     protected:
+      bool samplingImpl( const Mat& image, Rect boundingBox, std::vector<Mat>& sample );
+      ...
+
+    };
+@endcode
+
+Example of adding TrackerSamplerAlgorithm to TrackerSampler : :
+@code
+    //sampler is the TrackerSampler
+    Ptr<TrackerSamplerAlgorithm> CSCSampler = new TrackerSamplerCSC( CSCparameters );
+    if( !sampler->addTrackerSamplerAlgorithm( CSCSampler ) )
+     return false;
+
+    //or add CSC sampler with default parameters
+    //sampler->addTrackerSamplerAlgorithm( "CSC" );
+@endcode
+@sa
+   TrackerSamplerCSC, TrackerSamplerAlgorithm
+
+### TrackerFeatureSet
+
+TrackerFeatureSet is already instantiated (as first) , but you should define what kinds of features
+you'll use in your tracker. You can use multiple feature types, so you can add a ready
+implementation as TrackerFeatureHAAR in your TrackerFeatureSet or develop your own implementation.
+In this case, in the computeImpl method put the code that extract the features and in the selection
+method optionally put the code for the refinement and selection of the features.
+
+Example of creating specialized TrackerFeature TrackerFeatureHAAR : :
+@code
+    class CV_EXPORTS_W TrackerFeatureHAAR : public TrackerFeature
+    {
+     public:
+      TrackerFeatureHAAR( const TrackerFeatureHAAR::Params &parameters = TrackerFeatureHAAR::Params() );
+      ~TrackerFeatureHAAR();
+      void selection( Mat& response, int npoints );
+      ...
+
+     protected:
+      bool computeImpl( const std::vector<Mat>& images, Mat& response );
+      ...
+
+    };
+@endcode
+Example of adding TrackerFeature to TrackerFeatureSet : :
+@code
+    //featureSet is the TrackerFeatureSet
+    Ptr<TrackerFeature> trackerFeature = new TrackerFeatureHAAR( HAARparameters );
+    featureSet->addTrackerFeature( trackerFeature );
+@endcode
+@sa
+   TrackerFeatureHAAR, TrackerFeatureSet
+
+### TrackerModel
+
+TrackerModel is abstract, so in your implementation you must develop your TrackerModel that inherit
+from TrackerModel. Fill the method for the estimation of the state "modelEstimationImpl", that
+estimates the most likely target location, see @cite AAM table I (ME) for further information. Fill
+"modelUpdateImpl" in order to update the model, see @cite AAM table I (MU). In this class you can use
+the :cConfidenceMap and :cTrajectory to storing the model. The first represents the model on the all
+possible candidate states and the second represents the list of all estimated states.
+
+Example of creating specialized TrackerModel TrackerMILModel : :
+@code
+    class TrackerMILModel : public TrackerModel
+    {
+     public:
+      TrackerMILModel( const Rect& boundingBox );
+      ~TrackerMILModel();
+      ...
+
+     protected:
+      void modelEstimationImpl( const std::vector<Mat>& responses );
+      void modelUpdateImpl();
+      ...
+
+    };
+@endcode
+And add it in your Tracker : :
+@code
+    bool TrackerMIL::initImpl( const Mat& image, const Rect2d& boundingBox )
+    {
+      ...
+      //model is the general TrackerModel field of the general Tracker
+      model = new TrackerMILModel( boundingBox );
+      ...
+    }
+@endcode
+In the last step you should define the TrackerStateEstimator based on your implementation or you can
+use one of ready class as TrackerStateEstimatorMILBoosting. It represent the statistical part of the
+model that estimates the most likely target state.
+
+Example of creating specialized TrackerStateEstimator TrackerStateEstimatorMILBoosting : :
+@code
+    class CV_EXPORTS_W TrackerStateEstimatorMILBoosting : public TrackerStateEstimator
+    {
+     class TrackerMILTargetState : public TrackerTargetState
+     {
+     ...
+     };
+
+     public:
+      TrackerStateEstimatorMILBoosting( int nFeatures = 250 );
+      ~TrackerStateEstimatorMILBoosting();
+      ...
+
+     protected:
+      Ptr<TrackerTargetState> estimateImpl( const std::vector<ConfidenceMap>& confidenceMaps );
+      void updateImpl( std::vector<ConfidenceMap>& confidenceMaps );
+      ...
+
+    };
+@endcode
+And add it in your TrackerModel : :
+@code
+    //model is the TrackerModel of your Tracker
+    Ptr<TrackerStateEstimatorMILBoosting> stateEstimator = new TrackerStateEstimatorMILBoosting( params.featureSetNumFeatures );
+    model->setTrackerStateEstimator( stateEstimator );
+@endcode
+@sa
+   TrackerModel, TrackerStateEstimatorMILBoosting, TrackerTargetState
+
+During this step, you should define your TrackerTargetState based on your implementation.
+TrackerTargetState base class has only the bounding box (upper-left position, width and height), you
+can enrich it adding scale factor, target rotation, etc.
+
+Example of creating specialized TrackerTargetState TrackerMILTargetState : :
+@code
+    class TrackerMILTargetState : public TrackerTargetState
+    {
+     public:
+      TrackerMILTargetState( const Point2f& position, int targetWidth, int targetHeight, bool foreground, const Mat& features );
+      ~TrackerMILTargetState();
+      ...
+
+     private:
+      bool isTarget;
+      Mat targetFeatures;
+      ...
+
+    };
+@endcode
+### Try it
+
+To try your tracker you can use the demo at
+<https://github.com/lenlen/opencv/blob/tracking_api/samples/cpp/tracker.cpp>.
+
+The first argument is the name of the tracker and the second is a video source.
+
+*/
+
+#include <opencv2/tracking/tracker.hpp>
+#include <opencv2/tracking/tldDataset.hpp>
+
+#endif //__OPENCV_TRACKING_LENLEN