blobtrkobject.h

guide and some example with visualC++

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// ////////////////////////////////////////////////////////////////////////////
// BlobTrkObject.h
//
// This file contains the class for Blob Tracker Objects 
//
// ////////////////////////////////////////////////////////////////////////////

#ifndef BLOBTRKOBJECT_H
#define BLOBTRKOBJECT_H

//--------------------
// Confidence
//--------------------

// What percentage of algorithm state and location confidences is based on hysteresis (HISTORY) 
// what percentage on the current frame information (PIXEL)
const double LOCATION_HISTORY_PERC = 0.50;
const double LOCATION_PIXEL_PERC = 0.50;

// Determines how much influence past states or locations have 
// over confidence of current algorithm state and location
// (example: if 2, that means that for frame A, 
// the state of frame A-1 has twice the influence of frame A-2 in algorithm state confidence
const double DECAY = 2.0;

// Distance from previous location that is without confidence penalty.
// Measured in pixels.
const double DISTANCE_FREE = 20.0;

// Used to determine Location Pixel Confidence, as in the equation:
// (total # of non-background pixels in centroid window) 
// / (total # non-background pixels in frame + LOCATION_CONFIDENCE_WEIGHT)
const unsigned long LOCATION_CONFIDENCE_WEIGHT = 1;

// What numbers are considered 100% confidence for location confidence
const double LOCATION_100_PERCENT = 100.0;

// How many frames of historical data should be saved to determine confidence
const unsigned long HISTORY = 2;
//--------------------


// Object Definition
class BlobTrackerObject
{
    int m_id;
    CvPoint m_Center;
    CvRect m_Rectangle;
    unsigned long m_Size;

    static CvPoint RectCenter(const CvRect &rect)
    {
        CvPoint p = { rect.x + rect.width/2, rect.y + rect.height/2 };
        return p;
    };

public:
    BlobTrackerObject(const CvRect &rect, unsigned long size)
        : m_id(-1),
          m_Rectangle(rect),
          m_Size(size),
          m_Center(RectCenter(rect))
    {
    };

    void SetId(int id) { m_id = id; };

    // Get Functions
    int GetId() const { return m_id; };
    CvPoint GetCenter() const { return m_Center; };
    CvRect GetRect() const { return m_Rectangle; };
    unsigned long GetSize() const { return m_Size; };
};

class BlobTrackerObjectList : public std::vector<BlobTrackerObject>
{
};

#endif // BLOBTRKOBJECT_H