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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: $
* $Revision: $
* $Author: $
*
************************************************************************/
/************************************************************************
* FILE DESCR: Definitions for SubStroke feature extractor module
*
* CONTENTS:
*
* AUTHOR: Tanmay Mondal
*
* DATE: February 2009
* CHANGE HISTORY:
* Author Date Description of change
************************************************************************/
#ifndef __SUBSTROKESHAPEFEATUREEXTRACTOR_H
#define __SUBSTROKESHAPEFEATUREEXTRACTOR_H
#define SUPPORTED_MIN_VERSION "3.0.0"
// delimiter of the slope of extracted substroke
#define SUBSTROKES_ANGLE_DELIMITER -999.0
#define SUBSTROKES_LENGTH_REJECT_THRESHOLD 0.001
#define STROKE_SEGMENT_VALUE 0
#define SINGLE_SUBSTROKES 1
#define ANGLE_HIGHER_LIMIT_1 22.5
#define ANGLE_HIGHER_LIMIT_2 67.5
#define ANGLE_HIGHER_LIMIT_3 112.5
#define ANGLE_HIGHER_LIMIT_4 157.5
#define ANGLE_HIGHER_LIMIT_5 202.5
#define ANGLE_HIGHER_LIMIT_6 247.5
#define ANGLE_HIGHER_LIMIT_7 292.5
#define ANGLE_HIGHER_LIMIT_8 337.5
#define PI_DEGREE 180.0
#include "LTKShapeFeatureExtractor.h"
class SubStrokeShapeFeatureExtractor : public LTKShapeFeatureExtractor
{
public:
/** @brief Constructor for the SubStroke feature extractor
* Gets the cfg file path from the contorInfo
* Reads the cfg variables and poputlates the member variables
* @param controlInfo: LTKControlInfo : The control information
* @return no return value as it is a constructor
*/
SubStrokeShapeFeatureExtractor(const LTKControlInfo& controlInfo);
int extractFeatures(const LTKTraceGroup& inTraceGroup,
vector<LTKShapeFeaturePtr>& outFeatureVec);
LTKShapeFeaturePtr getShapeFeatureInstance();
private:
//store extracted sub-strokes
struct subStrokePoint
{
float X; // x point
float Y; // y point
bool penUp; // If point is penup then penUp = 1 else penUp =0
};
/** extract feature from sub strokes
*/
int extractFeaturesFromSubStroke(const vector<struct subStrokePoint>& inSubStrokeVector,
vector<float>& outSlope,
vector<float>& outLength,
vector<float>& outCenterOfGravity);
/** extract the sub strokes from the preprocessed trace group
*/
int extractSubStrokesFromInk(const LTKTraceGroup& inTraceGroup, vector<struct subStrokePoint>& outSubStrokeVector);
/** @brief claculate the angle
* inDeltaX,inDeltaY : float : the difference of x[i] and x[i+1] and difference of y[i] and y[i+1] of ink point
* float : the angle made with x axis and the point
*/
int computeSlope(const float inDeltaX, const float inDeltaY, float& outSlope);
/** decide the octant of the point along the ink
* slope : float : value of the angle
* int : the octant code
*/
int getDirectionCode(const float inSlope, int& outDirectionCode);
/** break the stroke into substrokes
* infirstSlope, insecondSlope : float : value of the slope
* int : SUCCESS : FAILURE
*/
int canSegmentStrokes(const float inFirstSlope, const float inSecondSlope, bool& outSegment);
/** compute the slope of each point present in the tace
* inTrace : LTKTrace : value of a trace
* int : SUCCESS : FAILURE : errorcode
*/
int getSlopeFromTrace(const LTKTrace& inTrace, vector<float>& outSlopeVector);
};
#endif //#ifndef __SUBSTROKESHAPEFEATUREEXTRACTOR_H
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