NICE_VisLearning/features/localfeatures/LocalFeatureSift.h

/** 
* @file LocalFeatureSift.h
* @brief local feature with sift (without detector)
* @author Erik Rodner
* @date 02/05/2008

*/
#ifndef LOCALFEATURESIFTINCLUDE
#define LOCALFEATURESIFTINCLUDE

#include "core/vector/VectorT.h"
#include "core/vector/MatrixT.h"
#include "core/image/ImageT.h"
#include "core/imagedisplay/ImageDisplay.h"

#include "core/basics/Config.h"
#include "LocalFeature.h"


namespace OBJREC {

/** local feature with sift */
class LocalFeatureSift : public LocalFeature
{

    protected:
	int octaves;
	int levels;
	bool normalizeFeature;
	int first_octave;
	double magnif;
	bool deletemode;
	bool integerValues;

	float threshold;
	float edgeThreshold;

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

	virtual ~LocalFeatureSift();
	
	/**
	 * returns the size of each the SIFT-Feature
	 * @return 128
	 */
	int getDescSize() const { return 128; };
	
	/** 
	 * get the descriptor
	 * @param img input image
	 * @param positions positions for the SIFT features
	 * @param descriptors output
	 * @return 0
	 */
	virtual int getDescriptors ( const NICE::Image & img, 
			     NICE::VVector & positions,
			     NICE::VVector & descriptors ) const;
				     
	/**
	 * computes the descriptor for a single image
	 * @param img 
	 * @param positions 
	 * @param descriptors 
	 */
	void computeDesc( const NICE::Image & img, NICE::VVector & positions, NICE::VVector & descriptors ) const;
	
	/**
	 * sort positions by scales for faster computing of the Keypoint orientation
	 * @param positions 
	 */
	void sortPositions(NICE::VVector & positions) const;
	
	void visualizeFeatures ( NICE::Image & mark, const NICE::VVector & positions, size_t color ) const;

     
};


} // namespace

#endif