Code samples for my face detection and recognition with OpenCV tutorial. http://blog.eyalarubas.com/2013/03/14/face-detection-and-recognition-theory-and-practice/

CsvWriter.hpp

class CsvWriter {
public:
    CsvWriter(const string &csvPath);
    virtual ~CsvWriter();
    void nextLine();
    void addEntry(const string &s);
private:
    ofstream _fs;
    bool _isFirstEntry;
};

FaceDetector.hpp

class FaceDetector {
public:
    FaceDetector(
            const string &cascadePath,
            double scaleFactor,
            int    minNeighbors,
            double minSizeRatio,
            double maxSizeRatio);
    virtual ~FaceDetector();
    void findFacesInImage(const Mat &img, vector<Rect> &res);
private:
    CascadeClassifier _cascade;
    double _scaleFactor;
    int    _minNeighbors;
    double _minSizeRatio;
    double _maxSizeRatio;
};

FramesReader.hpp

class FramesReader
{
public:
    FramesReader(const string &vidPath, int startFrame, int endFrame, int delta);
    virtual ~FramesReader();
    bool getNext(Mat &frame);
    Size getSize();
private:
    VideoCapture _vid;
    int _endFrame,
        _delta;
};

FramesWriter.hpp

class FramesWriter
{
public:
    FramesWriter(const string vidPath, double fps, Size size, int fourcc);
    virtual ~FramesWriter();
    void write(Mat &frame);
private:
    VideoWriter _vid;
    Size _f_size;
};

PersonRecognizer.hpp

class PersonRecognizer {
public:
    PersonRecognizer(const vector<Mat> &imgs, int radius, int neighbors,
            int grid_x, int grid_y, double threshold);
    virtual ~PersonRecognizer();
    bool recognize(const Mat &face, double &confidence) const;
private:
    Ptr<FaceRecognizer> _model;
    Size _faceSize;
};