字符分割 - 基于Opencv的汽车车牌识别

字符分割
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int CMyDialog::SegmentPlate()  
{  
    // 没有切割成功，直接弹出  
    if (pImgResize==NULL)    
    {   
        return 0;   
    }   
  
    int *num_h=new int[MAX(pImgResize->width,pImgResize->height)];  
    if ( num_h==NULL )   
    {     
        MessageBox("字符分割memory exhausted");  
        return 0;     
    }  
  
    int i=0,j=0,k=0;//循环变量 12  
    int  letter[14]={0,20,23,43,55,75,78,98,101,121,124,127,147,167}; // 默认分割  
    bool flag1=0;    
      
    // 垂直投影  
    for(i=0;i<40*HIGH_WITH_CAR;i++)  
    {     
         num_h[i]=0; // 初始化指针  
         for(j=0;j<17;j++)  // 0-16  
         {  
             num_h[i]+=CV_IMAGE_ELEM(pImgResize,uchar,j,i)/45;  
         }    
         for(j=24;j<40;j++)  // 24-39  
         {  
             num_h[i]+=CV_IMAGE_ELEM(pImgResize,uchar,j,i)/45;  
         }  
    }  
    // 初定位，定位点 第二个字符末端，  
    int max_count=0;  
    int flag=0;   
    for(i=30;i<40*HIGH_WITH_CAR;i++)  
    {  
        if(num_h[i]         {  
            max_count++;  
            if(max_count==11)  
            {  
                letter[3]=i-11;//第二字符的结束位置  
                while( (num_h[i]                 letter[4]=i-1;//第三个字符的开始位置  
                break;  
            }  
        }  
        else  
        {  
            max_count=0;  
        }  
    }  
  
    // 精定位  
    for(i=0;i<40*HIGH_WITH_CAR;i++)  
    {  
        for(j=17;j<=24;j++)  
        {  
            num_h[i]+=CV_IMAGE_ELEM(pImgResize,uchar,j,i)/45;  
        }  
    }  
      
    for(j=letter[3];j>0;j--)//找第一个和第二个字符起始位置  
    {  
        if((num_h[j]         {  
            letter[2]=j;                       //第二个字符的开始位置  
            letter[1]=(j>=23)?j-3:letter[1];   //第一个字符的结束位置  
            letter[0]=(j>=23)?j-23:letter[0];  //第一个字符的起始位置  
            break;  
        }  
    }  
  
    j=2;  flag=0;flag1=0;//两个标记  
    for(i=letter[4];i<40*HIGH_WITH_CAR;i++)  //从第三个字符的开始位置算起  
    {  
        if((num_h[i]>POINT_Y)&&(num_h[i-1]>POINT_Y) && !flag )  
        {  
            flag=1;  
            flag1=0;  
            letter[2*j]=i-1; //这里 只记录字符的开始位置  
            if(j==6)  //判断 最后一个字符的结束位置 是否越界 超出界限,如果没有,则letter[13]=letter[12]+20  
            {  
                letter[2*j+1]=((letter[2*j]+20)>40*HIGH_WITH_CAR-1)?40*HIGH_WITH_CAR-1:letter[2*j]+20;  
                break;  
            }  
        }  
        else if((num_h[i]         {  
            flag=0;  
            flag1=1;  
            letter[2*j+1]=i-1;  
            j++;  
        }    
    }     
    // 删除角点    
    for(i=0;i<40*HIGH_WITH_CAR-1;i++)  
    {  
        for(j=0;j<39;j++)  
        {  
            if(CV_IMAGE_ELEM(pImgResize,uchar,j,i)&&CV_IMAGE_ELEM(pImgResize,uchar,j,i+1)&&CV_IMAGE_ELEM(pImgResize,uchar,j+1,i)) //  01  
                CV_IMAGE_ELEM(pImgResize,uchar,j,i)=0;                                                                                                                                                                                                                             //   1  
              
            if(CV_IMAGE_ELEM(pImgResize,uchar,j,i)&&  CV_IMAGE_ELEM(pImgResize,uchar,j,i-1) &&CV_IMAGE_ELEM(pImgResize,uchar,j+1,i))     //  10  
                CV_IMAGE_ELEM(pImgResize,uchar,j,i)=0;                                                                                                                                                                                                                               //    1                      
                          
            if(CV_IMAGE_ELEM(pImgResize,uchar,j,i)&&CV_IMAGE_ELEM(pImgResize,uchar,j,i-1) &&CV_IMAGE_ELEM(pImgResize,uchar,j-1,i))         //   1        
                CV_IMAGE_ELEM(pImgResize,uchar,j,i)=0;                                                                                    // 10  
  
            if(CV_IMAGE_ELEM(pImgResize,uchar,j,i)&&CV_IMAGE_ELEM(pImgResize,uchar,j,i+1) &&CV_IMAGE_ELEM(pImgResize,uchar,j-1,i))           // 1        
                CV_IMAGE_ELEM(pImgResize,uchar,j,i)=0;                                                                                 // 01  
        }  
    }     
  
      
    // 分割出字符图片  
    pImgCharOne=cvCreateImage(cvSize(20,40),IPL_DEPTH_8U,1);  
    pImgCharTwo=cvCreateImage(cvSize(20,40),IPL_DEPTH_8U,1);  
    pImgCharThree=cvCreateImage(cvSize(20,40),IPL_DEPTH_8U,1);  
    pImgCharFour=cvCreateImage(cvSize(20,40),IPL_DEPTH_8U,1);  
    pImgCharFive=cvCreateImage(cvSize(20,40),IPL_DEPTH_8U,1);  
    pImgCharSix=cvCreateImage(cvSize(20,40),IPL_DEPTH_8U,1);  
    pImgCharSeven=cvCreateImage(cvSize(20,40),IPL_DEPTH_8U,1);  
  
            CvRect ROI_rect1;  
            ROI_rect1.x=0.5*(letter[1]+letter[0])-10;  
            ROI_rect1.y=0;  
            ROI_rect1.width=20;  
            ROI_rect1.height=40;  
            cvSetImageROI(pImgResize,ROI_rect1);  
            cvCopy(pImgResize,pImgCharOne,NULL); //获取第1个字符  
            cvResetImageROI(pImgResize);  
              
            ROI_rect1.x=0.5*(letter[3]+letter[2])-10;  
            ROI_rect1.y=0;  
            ROI_rect1.width=20;  
            ROI_rect1.height=40;  
            cvSetImageROI(pImgResize,ROI_rect1);  
            cvCopy(pImgResize,pImgCharTwo,NULL); //获取第2个字符  
            cvResetImageROI(pImgResize);