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/***************************************************************************
copyright : (C) 2007 by Sebastian Held
email : sebastian.held@gmx.de
***************************************************************************/
/***************************************************************************
* *
* ### based on BaToo: http://people.inf.ethz.ch/adelmanr/batoo/ ### *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of version 2 of the GNU General Public License as *
* published by the Free Software Foundation; *
* *
***************************************************************************/
#ifndef BARCODE_H
#define BARCODE_H
#include <qthread.h>
#include <qimage.h>
#include <qvaluevector.h>
#include <qobject.h>
#include <qmutex.h>
#include <math.h>
#include "barcode_v4l.h"
//#define BarcodeDecoder_DEBUG
//#define Decoder_EAN13_DEBUG
//#define Barcode_DEBUG
namespace barcodeRecognition {
static int code_odd[][4] = { { 30, 20, 10, 10 },
{ 20, 20, 20, 10 },
{ 20, 10, 20, 20 },
{ 10, 40, 10, 10 },
{ 10, 10, 30, 20 },
{ 10, 20, 30, 10 },
{ 10, 10, 10, 40 },
{ 10, 30, 10, 20 },
{ 10, 20, 10, 30 },
{ 30, 10, 10, 20 } };
static int code_even[][4] = { { 10, 10, 20, 30 },
{ 10, 20, 20, 20 },
{ 20, 20, 10, 20 },
{ 10, 10, 40, 10 },
{ 20, 30, 10, 10 },
{ 10, 30, 20, 10 },
{ 40, 10, 10, 10 },
{ 20, 10, 30, 10 },
{ 30, 10, 20, 10 },
{ 20, 10, 10, 30 } };
static bool parity_pattern_list[][6] = { { false, false, false, false, false, false },
{ false, false, true, false, true, true },
{ false, false, true, true, false, true },
{ false, false, true, true, true, false },
{ false, true, false, false, true, true },
{ false, true, true, false, false, true },
{ false, true, true, true, false, false },
{ false, true, false, true, false, true },
{ false, true, false, true, true, false },
{ false, true, true, false, true, false } };
class Barcode_EAN13 {
public:
Barcode_EAN13();
Barcode_EAN13( QValueVector<int> code );
bool isNull() const { return m_null; }
bool isValid() const;
QValueVector<int> getNumbers() const;
void setCode( QValueVector<int> code );
QString toString() const;
bool operator!= ( const Barcode_EAN13 &code );
protected:
QValueVector<int> m_numbers;
bool m_null;
};
class MatchMakerResult {
public:
MatchMakerResult( bool even, int digit );
bool isEven() const {return m_even;}
int getDigit() const {return m_digit;}
protected:
int m_digit;
bool m_even;
};
class Decoder_EAN13 {
public:
enum { BOTH_TABLES = 0, EVEN_TABLE = 1, ODD_TABLE = 2 };
static Barcode_EAN13 recognize( QValueVector< QValueVector<int> > fields );
static QValueVector<int> decode( QValueVector< QValueVector<int> > fields, int start_i, int end_i );
static MatchMakerResult recognizeNumber( QValueVector< QValueVector<int> > fields, int code_table_to_use );
static MatchMakerResult recognizeSystemCode( bool parity_pattern[6] );
};
/** \brief this thread handles barcode recognition using webcams
* @author Sebastian Held <sebastian.held@gmx.de>
*/
class barcodeRecognitionThread : public QObject, public QThread {
Q_OBJECT
public:
barcodeRecognitionThread();
~barcodeRecognitionThread();
virtual void run();
void stop();
void recognizeBarcode( QImage img );
bool isWebcamAvailable();
signals:
void recognized( QString barcode );
void gotImage( QImage &img );
protected:
volatile bool m_stop;
QImage m_barcode_img;
QMutex m_stop_mutex, m_barcode_img_mutex;
barcode_v4l *m_barcode_v4l;
Barcode_EAN13 recognize( QImage img );
Barcode_EAN13 recognizeCode( QImage img, int x1, int x2, int y );
void addNumberToPossibleNumbers( QValueVector<int> number, int possible_numbers[10][13][2], bool correct_code );
void sortDigits( int possible_numbers[10][13][2] );
Barcode_EAN13 extractBarcode( int possible_numbers[10][13][2] );
QValueVector<int> transformPathToBW( QValueVector<QRgb> line);
QValueVector< QValueVector<int> > extractFieldInformation( QValueVector<int> string );
Barcode_EAN13 detectValidBarcode ( int possible_numbers[10][13][2], int max_amount_of_considered_codes );
bool isValid( int numbers[13] );
bool isValid( QValueVector<int> numbers );
void printArray( int array[10][13][2], int level );
};
}
#endif
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