#ifndef RASTER_EDGE_EVALUATOR_H
#define RASTER_EDGE_EVALUATOR_H

#include "tcg/tcg_sequence_ops.h"
#include "tcg/tcg_polylineops.h"

//*************************************************************************
//    Standard Raster Edge Evaluator
//*************************************************************************

/*!
  \brief This class implements an evaluator for tcg's sequential reduction algorithm
  that can be used to simplify the borders extracted from a raster image under
  a specified tolerance factor. This is typically used as a step in polygonal-based
  image vectorization processes.

\sa The tcg::sequence_ops::minimalPath() function.
*/
template <typename RanIt>
class RasterEdgeEvaluator : public tcg::polyline_ops::StandardDeviationEvaluator<RanIt>
{
	double m_tolerance; //!< Maximal distance of an edge from one of the
						//!< points it approximates, in the Manhattan metric
	double m_maxLength; //!< Maximal length of an acceptable edge length,
	//!< in the standard metric
public:
	typedef typename tcg::polyline_ops::StandardDeviationEvaluator<RanIt>::iterator_type iterator_type;
	typedef typename tcg::polyline_ops::StandardDeviationEvaluator<RanIt>::point_type point_type;
	typedef typename tcg::polyline_ops::StandardDeviationEvaluator<RanIt>::penalty_type penalty_type;

public:
	RasterEdgeEvaluator(const iterator_type &begin, const iterator_type &end,
						double tolerance, double maxLength);

	iterator_type furthestFrom(const iterator_type &it);
	penalty_type penalty(const iterator_type &a, const iterator_type &b);
};

#endif //RASTER_EDGE_EVALUATOR_H

#ifdef INCLUDE_HPP
#include "raster_edge_evaluator.hpp"
#endif