SIFTFeatureEntry.h

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// ****************************************************************************
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// ****************************************************************************
// Filename:  SIFTFeatureEntry.h
// Author:    Pedram Azad
// Date:      2006
// ****************************************************************************


#ifndef _SIFT_FEATURE_ENTRY_H_
#define _SIFT_FEATURE_ENTRY_H_


// ****************************************************************************
// Necessary includes
// ****************************************************************************

#include "../FeatureEntry.h"



// ****************************************************************************
// CSIFTFeatureEntry
// ****************************************************************************

class CSIFTFeatureEntry : public CFeatureEntry
{
public:
        // constructors
        CSIFTFeatureEntry(float *data, float x, float y, float angle, float scale) : CFeatureEntry(data, 128, x, y, angle, scale)
        {
        }

        CSIFTFeatureEntry(float x, float y, float angle, float scale)  : CFeatureEntry(128, x, y, angle, scale)
        {
        }

        CSIFTFeatureEntry() : CFeatureEntry(128, 0.0f, 0.0f, 0.0f, 0.0f, Math3d::zero_vec)
        {
        }

        CSIFTFeatureEntry(const CSIFTFeatureEntry &featureEntry) : CFeatureEntry(featureEntry)
        {
        }


        // pure virtual methods
        eFeatureType GetType() const
        {
                return tSIFT;
        }

        CFeatureEntry* Clone() const
        {
                return new CSIFTFeatureEntry(*this);
        }

        float Error(const CDynamicArrayElement *pElement) const
        {
                const CSIFTFeatureEntry *pCastedElement = (const CSIFTFeatureEntry *) pElement;

                const float *pFeature = pCastedElement->m_pFeature;
                float sum = 0.0f;

                for (int i = 0; i < m_nSize; i++)
                        sum += pFeature[i] * m_pFeature[i];
                        
                return 1.0f - sum;
        }
};




#endif /* _SIFT_FEATURE_ENTRY_H_ */