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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef __IMAGEPYRAMID_H__
#define __IMAGEPYRAMID_H__
/** \file
* \ingroup freestyle
* \brief Class to represent a pyramid of images
*/
#include <vector>
#include "../system/FreestyleConfig.h"
#ifdef WITH_CXX_GUARDEDALLOC
# include "MEM_guardedalloc.h"
#endif
namespace Freestyle {
class GrayImage;
class ImagePyramid {
protected:
std::vector<GrayImage *> _levels;
public:
ImagePyramid()
{
}
ImagePyramid(const ImagePyramid &iBrother);
// ImagePyramid(const GrayImage& level0, unsigned nbLevels);
virtual ~ImagePyramid();
/*! Builds the pyramid.
* must be overloaded by inherited classes.
* if nbLevels==0, the complete pyramid is built
*/
virtual void BuildPyramid(const GrayImage &level0, unsigned nbLevels) = 0;
/*! Builds a pyramid without copying the base level */
virtual void BuildPyramid(GrayImage *level0, unsigned nbLevels) = 0;
virtual GrayImage *getLevel(int l);
/*! Returns the pixel x,y using bilinear interpolation.
* \param x:
* the abscissa specified in the finest level coordinate system
* \param y:
* the ordinate specified in the finest level coordinate system
* \param level:
* the level from which we want the pixel to be evaluated
*/
virtual float pixel(int x, int y, int level = 0);
/*! Returns the width of the level-th level image */
virtual int width(int level = 0);
/*! Returns the height of the level-th level image */
virtual int height(int level = 0);
/*! Returns the number of levels in the pyramid */
inline int getNumberOfLevels() const
{
return _levels.size();
}
#ifdef WITH_CXX_GUARDEDALLOC
MEM_CXX_CLASS_ALLOC_FUNCS("Freestyle:ImagePyramid")
#endif
};
class GaussianPyramid : public ImagePyramid {
protected:
float _sigma;
public:
GaussianPyramid(float iSigma = 1.f) : ImagePyramid()
{
_sigma = iSigma;
}
GaussianPyramid(const GrayImage &level0, unsigned nbLevels, float iSigma = 1.0f);
GaussianPyramid(GrayImage *level0, unsigned nbLevels, float iSigma = 1.0f);
GaussianPyramid(const GaussianPyramid &iBrother);
virtual ~GaussianPyramid()
{
}
virtual void BuildPyramid(const GrayImage &level0, unsigned nbLevels);
virtual void BuildPyramid(GrayImage *level0, unsigned nbLevels);
/* accessors */
inline float getSigma() const
{
return _sigma;
}
/* modifiers */
};
} /* namespace Freestyle */
#endif // __IMAGEPYRAMID_H__
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