segbreakdet.cc

手写识别是模式识别中研究得一个热点

//
// SegBreakDet - detects all the possible segmant breaks (which are
//  the freeman bvectors 0,1, and 2.
// Input - reads HWRawDataC records from standard in, w/ freeman vect events.
// Output - writes HWRawDataC records to standard out w/ seg break events.
//

// System Include Files.

// Local Include Files.
#include "HWRawDataC.hh"

// Manifest Constants.

// Prototypes.
void OutputPossSegBreak(HWRawDataC);

// Global Variables


int main(int argc, char *argv[])
{
  // Read off the header and put it back on the output stream.
  HWHeaderC Header;
  cin >> Header;
  cout << Header;

  // Process all of the data points.
  int PenDown = 0;
  HWRawDataC RawData;
  while(!!(cin >> RawData))
    {
      switch(RawData.Type)
	{
	case PEN_UP:
	  // Pass the pen up through.
	  cout << RawData;
	case FREEMAN_0:		// Strip out the freeman vectors.
	case FREEMAN_1:
	case FREEMAN_2:
	case FREEMAN_3:
	case FREEMAN_4:
	case FREEMAN_5:
	case FREEMAN_6:
	case FREEMAN_7:
	  // This is a freeman vector event.
	  OutputPossSegBreak(RawData);
	  break;
	default:
	  // Just pass the point through.
	  cout << RawData;
	  break;
	}
    }
}


//
// OutputPossSegBreak() - checks to see if a ligature is starting (0,1,2).
//
void OutputPossSegBreak(HWRawDataC RawData)
{
  static InLigature = 0;
  static HWRawDataC LastVector;

  switch(RawData.Type)
    {
    case FREEMAN_0:
    case FREEMAN_1:
    case FREEMAN_2:
      if (!InLigature)
	{
	  // Output the seg break marker with time equal to the end of it.
	  InLigature = 1;

	  cerr << "Ligature start detected, Freeman " 
	    << RawData.Type-FREEMAN_0 << ", from " << LastVector.DataPoint
	      << " to " << RawData.DataPoint << " (" << RawData.Time << ")\n";

	  HWRawDataC PossSegBreak;
	  PossSegBreak.Time = RawData.Time;
	  PossSegBreak.Type = POSS_SEG_BREAK;
	  cout << PossSegBreak;	// End of vector.
	}
      // This is in a ligature so set bit.
      InLigature = 1;
      break;
    default:
      InLigature = 0;		// May have been a pen up.
      break;
    }
  LastVector = RawData;
}