NICE_VisLearning/features/fpfeatures/EOHFeature.h

/** 
* @file EOHFeature.h
* @brief edge orientation histogram (Levi and Weiss, 2004)
* @author Erik Rodner
* @date 05/07/2008

*/
#ifndef EOHFeatureINCLUDE
#define EOHFeatureINCLUDE

#ifdef NOVISUAL
#include <vislearning/nice_nonvis.h>
#else
#include <vislearning/nice.h>
#endif
 
#include "core/basics/Config.h"
#include "vislearning/cbaselib/Feature.h"


namespace OBJREC {

/** edge orientation feature of Levi and Weiss */
class EOHFeature : public Feature
{

    protected:

	enum {
	    EOH_VALUE = 0,
	    EOH_RATIO,
	    EOH_DOMINANT_ORIENTATION,
	    EOH_NUMTYPES
	};

	/** @{ feature parameter */
	int window_size_x;
	int window_size_y;
	int bin;
	int bin2; // used for EOH_RATIO
	int type;
	/** @} */


	/** @{ parameter for feature generation */
	int numScales;
	int numBins;
	double scaleStep;
	int maxdepth;
	/** @} */

    public:
  
	/** simple constructor */
	EOHFeature( const NICE::Config *conf );

	/** internally used by EOHFeature::explode */
	EOHFeature () { bin = bin2 = 0; type = EOH_VALUE; };
      
	/** simple destructor */
	virtual ~EOHFeature();
     
	double val( const Example *example ) const;
	void explode ( FeaturePool & featurePool, bool variableWindow = true ) const;
	Feature *clone() const;
	Feature *generateFirstParameter () const;

	void restore (std::istream & is, int format = 0);
	void store (std::ostream & os, int format = 0) const;
	void clear ();
};


} // namespace

#endif