应用介绍

此项目是EAN13条形码识别的译码技术，在基于机器视觉技术上，构建了一套条形码在线检测识别系统，系统将由以下几个部分构成：条形码图像定位与采集、计算机图像预处理、条形码图像中值滤波去噪、条码解析与识读。经过实验，确定该系统可对绝大部分EAN13条形码进行快速并准确的识读。

//条形码解析

#include "analyzer.h"

#include <qDebug>

#include <vector>

static char A[]={0x0D,0x19,0x13,0x3D,0x23,0x31,0x2F,0x3B,0x37,0x0B};//条码解析表

static char B[]={0x27,0x33,0x1B,0x21,0x1D,0x39,0x05,0x11,0x09,0x17};

static char R[]={0x72,0x66,0x6C,0x42,0x5C,0x4E,0x50,0x44,0x48,0x74};

static int ORDER[10][13]={1,1,1,1,1,1,-1,2,2,2,2,2,2,

                          1,1,0,1,0,0,-1,2,2,2,2,2,2,

                          1,1,0,0,1,0,-1,2,2,2,2,2,2,

                          1,1,0,0,0,1,-1,2,2,2,2,2,2,

                          1,0,1,1,0,0,-1,2,2,2,2,2,2,

                          1,0,0,1,1,0,-1,2,2,2,2,2,2,

                          1,0,0,0,1,1,-1,2,2,2,2,2,2,

                          1,0,1,0,1,0,-1,2,2,2,2,2,2,

                          1,0,1,0,0,1,-1,2,2,2,2,2,2,

                          1,0,0,1,0,1,-1,2,2,2,2,2,2,

                         };//EAN-13条码的奇偶次序（1表示奇次序0表示偶次序）

Analyzer::Analyzer()

{

   // ImgtoNum();

    startFlag=0;

}

bool Analyzer::ImgtoNum(int pnum)

{

    Mat Img_gray;

    cvtColor(rawImg,Img_gray,COLOR_BGR2GRAY,1);

    for(int k=70;k<150;k+=20){

        Mat Img_2zhi;

        threshold(Img_gray,Img_2zhi,k,255,THRESH_BINARY);

        int high,width;

        width=Img_2zhi.cols;

        high=Img_2zhi.rows;

        int startPos;

        startPos=1;

        QString res;

        int result[12];

        std::vector<classis> blackBar;

        std::vector<classis> whiteBar;

        //对整幅图逐行检测

        while(startPos<high){

            res="";

            getSize(startPos,width,Img_2zhi,&blackBar,&whiteBar);//获取黑白条纹的位置和宽度

            cacuDig(blackBar,whiteBar,result,pnum);//解析成数字

            if(checkOut(result,pnum)){//校验

                for(int i=0;i<12;i++){

                    res+=QString::number(result[i],10);

                }

                emit successGet(QString::number(pnum)+res);

                return true;

            }

            startPos+=2;

        }

    }

    return false;

}

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