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//
// libavg - Media Playback Engine.
// Copyright (C) 2003-2011 Ulrich von Zadow
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// Current versions can be found at www.libavg.de
//
#ifndef _DeDistort_H_
#define _DeDistort_H_
#include "../api.h"
#include "CoordTransformer.h"
#include "../base/Point.h"
#include "../base/Rect.h"
#include <boost/shared_ptr.hpp>
#include <libxml/parser.h>
#include <libxml/xmlwriter.h>
#include <vector>
#include <string>
namespace avg {
class TrackerConfig;
class AVG_API DeDistort: public CoordTransformer {
public:
DeDistort();
DeDistort(const DPoint& camExtents, const DPoint& displayExtents);
DeDistort(const DPoint& camExtents, const std::vector<double>& distortionParams,
double angle, double trapezoidFactor, const DPoint& displayOffset,
const DPoint& displayScale);
virtual ~DeDistort();
DPoint transformBlobToScreen(const DPoint& pt);
DPoint transformScreenToBlob(const DPoint& pt);
virtual DPoint transform_point(const DPoint& pt);
virtual DPoint inverse_transform_point(const DPoint& pt);
DRect getDisplayArea(const DPoint& displayExtents);
DRect getActiveBlobArea(const DRect& displayROI);
void load(const DPoint &CameraExtents, const TrackerConfig& config);
void save(TrackerConfig& config);
bool operator ==(const DeDistort& other) const;
void dump() const;
private:
double calc_rescale();
DPoint inverse_undistort(const std::vector<double>& params, const DPoint& pt);
DPoint undistort(const std::vector<double>& params, const DPoint& pt);
DPoint trapezoid(const double trapezoid_factor, const DPoint& pt);
DPoint inv_trapezoid(const double trapezoid_factor, const DPoint& pt);
DPoint m_CamExtents;
std::vector<double> m_DistortionParams;
double m_Angle;
double m_TrapezoidFactor;
DPoint m_DisplayOffset;
DPoint m_DisplayScale;
double m_RescaleFactor;
};
typedef boost::shared_ptr<DeDistort> DeDistortPtr;
}
#endif
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