zones.cc

手写识别是模式识别中研究得一个热点

#include "HWRawDataC.hh"
#include <assert.h>
#include <stdlib.h>
#include <fstream.h>

int main(int argc, char *argv[])
{
  if (argc < 2 || argc > 3)
    {
      cout << "Usage: " << argv[0] << " <Threshold> [<EventBase>]\n";
      cout << "Where <Threshold> is the horizontal line over which the stylus must pass\n";
      cout << "                  for an event to be recognized, and\n";
      cout << "      <EventBase> is the event number for a downward crossing of the\n";
      cout << "                  threshold line and <EventBase>+1 is an upward crossing.\n";
      cout << "                  The default value for EventBase is 50.\n";
      return 1;
    }

  const long Threshold = atoi(argv[1]);

  int EventBase = 6;
  if (argc == 3) EventBase = atoi(argv[2]);

  long LastY = -1;
  long PenUp = 1;

  HWHeaderC Header;
  cin >> Header;
  cout << Header;

  while (1)
    {
      HWRawDataC Rec;
      cin >> Rec;
      if (!cin) break;
      cout << Rec;

      if (PenUp) LastY = -1;
      if (Rec.Type == PEN_UP) PenUp = 1;
      if (Rec.Type == PEN_DOWN) PenUp = 0;

      if (Rec.Type != 0) 
	continue;
      
      if (LastY != -1 && LastY <= Threshold && Rec.DataPoint.YPos > Threshold) 
	{
	  Rec.Type = EventBase;
	  cout << Rec;
	}
      else if (LastY != -1 && LastY > Threshold && Rec.DataPoint.YPos <= Threshold) 
	{
	  Rec.Type = EventBase+1;
	  cout << Rec;
	}

      LastY = Rec.DataPoint.YPos;
    }
  return 0;
}