/*
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copy or use the software.
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               For Open Source Computer Vision Library
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This file was part of GSoC Project: Facemark API for OpenCV
Final report: https://gist.github.com/kurnianggoro/74de9121e122ad0bd825176751d47ecc
Student: Laksono Kurnianggoro
Mentor: Delia Passalacqua
*/

#ifndef __OPENCV_FACEMARK_LBF_HPP__
#define __OPENCV_FACEMARK_LBF_HPP__

#include "opencv2/face/facemark_train.hpp"

namespace cv {
namespace face {

//! @addtogroup face
//! @{

class CV_EXPORTS_W FacemarkLBF : public FacemarkTrain
{
public:
    struct CV_EXPORTS Params
    {
        /**
        * \brief Constructor
        */
        Params();

        double shape_offset;
        //!<  offset for the loaded face landmark points
        String cascade_face;
        //!<  filename of the face detector model
        bool verbose;
        //!< show the training print-out

        int n_landmarks;
        //!<  number of landmark points
        int initShape_n;
        //!<  multiplier for augment the training data

        int stages_n;
        //!<  number of refinement stages
        int tree_n;
        //!<  number of tree in the model for each landmark point refinement
        int tree_depth;
        //!<  the depth of decision tree, defines the size of feature
        double bagging_overlap;
        //!<  overlap ratio for training the LBF feature

        std::string model_filename;
        //!<  filename where the trained model will be saved
        bool save_model; //!< flag to save the trained model or not
        unsigned int seed; //!< seed for shuffling the training data

        std::vector<int> feats_m;
        std::vector<double> radius_m;
        std::vector<int> pupils[2];
        //!<  index of facemark points on pupils of left and right eye

        Rect detectROI;

        void read(const FileNode& /*fn*/);
        void write(FileStorage& /*fs*/) const;

    };

    class BBox {
    public:
        BBox();
        ~BBox();
        BBox(double x, double y, double w, double h);

        Mat project(const Mat &shape) const;
        Mat reproject(const Mat &shape) const;

        double x, y;
        double x_center, y_center;
        double x_scale, y_scale;
        double width, height;
    };

    static Ptr<FacemarkLBF> create(const FacemarkLBF::Params &parameters = FacemarkLBF::Params() );
    virtual ~FacemarkLBF(){};
}; /* LBF */

//! @}

} /* namespace face */
}/* namespace cv */

#endif