hwrawdatac.hh

手写识别是模式识别中研究得一个热点

/****************************************************************

 Description:

This module allows HWHeaderC and HWRawDataC objects to be read and
written to/from the C++ stream objects.  Return characters are
automatically appended to the output line.

 Examples:

        ifstream F("hello.hw", ios::in || ios::nocreate);
	HWHeaderC Header;
	F >> Header;
	HWRawDataC Rec1, Rec2;
	F >> Rec1 >> Rec2;

	ofstream F("hello.hw", ios::out);
	HWHeaderC Header;
	strcpy(Header.String, "hello");
	F << Header;
	while (<not done reading user input>) {
	  HWRawDataC Rec;
	  <get input point from user into Rec>
  	  F << Rec;
	}

****************************************************************/


#include <fstream.h>
#include <string.h>

// The "type" of the HWRawDataC records.

// Raw tablet events.
#define DATA_RECORD 0
#define PEN_DOWN    1
#define PEN_UP      2
#define CHAR_BOUND  3
#define WORD_BOUND  4
#define END_OF_FILE 5

// Freeman vectors.
#define FREEMAN_0 10
#define FREEMAN_1 11
#define FREEMAN_2 12
#define FREEMAN_3 13
#define FREEMAN_4 14
#define FREEMAN_5 15
#define FREEMAN_6 16
#define FREEMAN_7 17

// Possible segment breaks.
#define POSS_SEG_BREAK 18

// The velocity detector.
#define MAX_VELOCITY   19
#define MIN_VELOCITY   20

// The loop detector.
#define LOOP 21

// The zone detector.
#define ZONE_UP_CROSSING 22
#define ZONE_DOWN_CROSSING 23

// Word segmenter.
#define END_WORDBODY 30      	//navy blue
#define END_WORDFRAG 24 	//??
#define END_TCROSS 40       	//dark green
#define END_IDOT 70         	//light blue
#define END_PUNCT 60        	//grey
#define END_STROKEOUT 50      	//cream
#define END_UNKNOWN 80        	//?

//Ascenders, Descenders, Median Axis Crossings
#define ASC_UP_CROSSING 90
#define ASC_DOWN_CROSSING 91
#define DES_UP_CROSSING 92
#define DES_DOWN_CROSSING 93
#define MED_UP_CROSSING 94
#define MED_DOWN_CROSSING 95

struct HWHeaderC {
  HWHeaderC() 
    {
      strcpy(Magic, "HW_file");
      strcpy(String, "");
    }

  IsValid() {return strcmp(Magic, "HW_file") == 0;}

  // A magic string.
  char Magic[20];

  // The letter, word, or string written in the file.  An
  // empty string if it is unknown.
  char String[1000];
};


// If unknown, XTilt, YTilt, and Pressure can be filled with
// the value of -1.  XPos and YPos must be non-negative.
struct HWDataPointC {
  HWDataPointC() {
    XPos = YPos = 0;
    XTilt = YTilt = Pressure = -1;
  }

  HWDataPointC(long InitX, long InitY) {
    XPos = InitX; YPos = InitY;
    XTilt = YTilt = Pressure = -1;
  }

  // The co-ordinates of the point in any units.  Must 
  // be positive.
  long XPos, YPos;

  // Stylus tilt in degrees along the X and Y axis.  
  // This record would be unused by
  // the digitizing tablet we have, but could be faked or
  // used by other digitizing tablets.
  long XTilt, YTilt;

  // Pressure or width of the pen stroke in some units.
  long Pressure;
};


struct HWRawDataC {
  HWRawDataC()
    {
      Type = Time = 0;
    }

  // The "type" of the record.  See top of file for a list.
  int Type;

  // The time, in ms, between the first record in the file 
  // and this record.
  long Time;

  // If type == 0, then this is the data point of the data record.
  HWDataPointC DataPoint;
};


ostream& operator << (ostream& outfile, HWHeaderC Header);
ostream& operator << (ostream& outfile, HWRawDataC Record);
ostream& operator << (ostream& outfile, HWDataPointC Point);
istream& operator >> (istream& infile, HWHeaderC& Header);
istream& operator >> (istream& infile, HWRawDataC& Record);
int operator ==(const HWDataPointC& P1, const HWDataPointC& P2);