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/*****************************************************************************************
* Copyright (c) 2006 Hewlett-Packard Development Company, L.P.
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
* Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
* OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*****************************************************************************************/
/************************************************************************
* SVN MACROS
*
* $LastChangedDate: 2008-07-10 15:23:21 +0530 (Thu, 10 Jul 2008) $
* $Revision: 556 $
* $Author: sharmnid $
*
************************************************************************/
/************************************************************************
* FILE DESCR: Function prototype for feature extraction module
*
* CONTENTS:
*
* AUTHOR: Nidhi Sharma
*
* DATE: 07-FEB-2007
* CHANGE HISTORY:
* Author Date Description of change
************************************************************************/
#ifndef __LTKFEATUREEXTRACTOR_H
#define __LTKFEATUREEXTRACTOR_H
#include "LTKTypes.h"
#include "LTKShapeFeatureMacros.h"
// Forward class declarations
class LTKTraceGroup;
class LTKShapeFeature;
/**
* @ingroup feature_extractor
* @brief An abstract class which is extended by all the feature extractors.
* @class LTKShapeFeatureExtractor
*
*/
class LTKShapeFeatureExtractor
{
public:
/**
* <b>Responsibility</b><br>
* Extract features from the input TraceGroup passed a parameter.
*
* <b>Description</b>
* <p>
* Every feature representation class has a feature extractor associated with it. The feature extractor
* extracts the features from the trace group passed as parameter.
* </p>
*
* <p>This function is based on run-time polymorphism.
* The pointer to the derived class instances are stored in a vector of base class (<i>LTKShapeFeature</i>) pointers.
* </p>
*
* @return Pointer to the vector of LTKShapeFeature pointers.
*/
virtual int extractFeatures(const LTKTraceGroup& inTraceGroup,
vector<LTKShapeFeaturePtr>& outFeatureVec)=0;
/**
* <b>Responsibility</b><br>
* Returns the instance of the shape feature class associated with the feature extractor.
*
* @return Pointer to the shape feature class.
*
*/
virtual LTKShapeFeaturePtr getShapeFeatureInstance()=0;
/**
* <b>Responsibility</b><br>
* Constructs traceGroup based on input LTKShapeFeaturePtr
*
* @return Pointer to Trace Group.
*
*/
virtual int convertFeatVecToTraceGroup(
const vector<LTKShapeFeaturePtr>& shapeFeature,
LTKTraceGroup& outTraceGroup);
};
#endif
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