/** 
* @file RFHoG.h
* @brief computes the HoG features for each region
* @author Björn Fröhlich and Alexander Arest
* @date 02-10-2010
*/
#ifndef RFHoGINCLUDE
#define RFHoGINCLUDE

#include <vislearning/nice.h>

#include "core/basics/Config.h"
#include "vislearning/cbaselib/LabeledSet.h"
#include "vislearning/segmentation/RegionGraph.h"
#include "vislearning/features/localfeatures/LocalFeature.h"
#include "vislearning/features/regionfeatures/RegionFeatures.h"
#include "vislearning/features/regionfeatures/RFStruct.h"

namespace OBJREC {

class RFHoG: public RFStruct
{
    protected:
		/** @{ feature parameter */
		int amount_cell_x; // Amount of cells in x-Axis
		int amount_cell_y; // Amount of cells in y-Axis
		int block_x;
		int block_y;

		/** @} */
		
    public:
  
	/** simple constructor */
	RFHoG( const NICE::Config *conf);

	/** simple destructor */
	virtual ~RFHoG();
	
	/**
	 * extracts the features for region rg (displayed in mask)
	 * @param imgd_gradient allready computed gradientsmagnitudes
	 * @param imgd_graddir allready computed gradientsdirection
	 * @param rg input region graph
	 * @param mask input region map
	 * @param feats output features (in order of rg)
	 */
	virtual void extract ( const NICE::FloatImage &imgd_gradient, const NICE::Image &imgd_graddir, const RegionGraph &rg, const NICE::Matrix &mask, NICE::VVector & feats );
};

} // namespace

#endif