NICE_VisLearning/features/fpfeatures/PixelPairFeature.h

/** 
* @file PixelPairFeature.h
* @brief like in Shotton paper
* @author Erik Rodner
* @date 04/21/2008

*/
#ifndef PixelPairFeatureINCLUDE
#define PixelPairFeatureINCLUDE

#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 {

/** simple haar like feature */
class PixelPairFeature : public Feature
{

    protected:
	enum {
	    PPTYPE_DIFF = 0,
	    PPTYPE_ABSDIFF,
	    PPTYPE_SUM,
	    PPTYPE_VALUE
	};

	int type;
	int imagetype;

	int x1;
	int y1;
	int b1;

	int x2;
	int y2;
	int b2;

	int step_x;
	int step_y;

	int window_size_x;
	int window_size_y;

    public:
  
	/** simple constructor */
	PixelPairFeature( const NICE::Config *conf );
      
	/** without memory wasting config */
	PixelPairFeature ( int window_size_x,	
		      int window_size_y,
		      int step_x,
		      int step_y,
		      int imagetype );

	/** simple destructor */
	virtual ~PixelPairFeature();
     
	double val( const Example *example ) const;

	void explode ( FeaturePool & featurePool, bool variableWindow = true ) const;

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

#if 0
	void calcFeatureValues ( const Examples & examples,
				    std::vector<int> & examples_selection,
				    FeatureValuesUnsorted & values ) const;
#endif

};


} // namespace

#endif