图像周长

writen by wqj1212@yahoo.com.cn

void  Cbiaoji1::zhouchang(IplImage *src)
{
    IplImage *imgZhouchang=NULL;
 biaoji(src);
 imgZhouchang=cvCreateImage(cvSize(src->width,src->height),8,1);
 for(int j=0;j<imgZhouchang->height;j++)
        for(int i=0;i<imgZhouchang->width;i++)
        {
            CV_IMAGE_ELEM(imgZhouchang,uchar,j,i)=255;
        }
 long pixel;
 bool bFindStartPoint;
 bool bFindPoint;
 CvPoint StartPoint,CurrentPoint;
 int Direction[8][2]={{-1,1},{0,1},{1,1},{1,0},{1,-1},{0,-1},{-1,-1},{-1,0}};
 int BeginDirect;
 for(int t=1;t<=x_sign;t++)
 {
     if(flag[t]!=0)
     {
         bFindStartPoint=false;
         for(int j=0;j<src->height && !bFindStartPoint;j++)
         {
             for(int i=0;i<src->width && !bFindStartPoint;i++)
                
             {
                 if(CV_IMAGE_ELEM(temp,uchar,j,i)==t)
                 {
                     bFindStartPoint=TRUE;
                     StartPoint.y=j;
                     StartPoint.x=i;
                     CV_IMAGE_ELEM(imgZhouchang,uchar,j,i)=t;
                 }
             }
         }
         BeginDirect=0;
         bFindStartPoint=false;
         CurrentPoint.y=StartPoint.y;
         CurrentPoint.x=StartPoint.x;
         while(!bFindStartPoint)
         {
             bFindPoint=false;
             while(!bFindPoint)
             {
                 pixel=CV_IMAGE_ELEM(temp,uchar,CurrentPoint.y+Direction[BeginDirect][1],CurrentPoint.x+Direction[BeginDirect][0]);
                
                 if(pixel==t)
                 {
                     bFindPoint=true;
                     CurrentPoint.y=CurrentPoint.y+Direction[BeginDirect][1];
                     CurrentPoint.x=CurrentPoint.x+Direction[BeginDirect][0];
                     if(CurrentPoint.y==StartPoint.y && CurrentPoint.x==StartPoint.x)
                     {
                         bFindStartPoint=true;
                     }
                     CV_IMAGE_ELEM(imgZhouchang,uchar,CurrentPoint.y,CurrentPoint.x)=t;
                     BeginDirect--;
                     if(BeginDirect==-1)
                         BeginDirect=7;
                     BeginDirect--;
                     if(BeginDirect==-1)
                         BeginDirect=7;
                 }
                 else
                 {
                     BeginDirect++;
                     if (BeginDirect==8)
                         BeginDirect=0;
                 }

             }
         }

     }
     
 }
 
int x_line=0;
int fm[255]={0};
memset(fm,0,255);
for(j=0;j< imgZhouchang->height;j++)
for(int i=0;i< imgZhouchang->width;i++)
{
    if(CV_IMAGE_ELEM( imgZhouchang,uchar,j,i)!=0)
    {
        x_line=CV_IMAGE_ELEM( imgZhouchang,uchar,j,i);
        ++fm[x_line];
    }
}
memset(fn,0,255);
int y_line=0;
int m_line=0;
for(int i=0;i<=x_sign;i++)
{
    if(fm[i]!=0)
    {
        if(fn[y_line]==0)
        {
            fn[y_line]=fm[i];
            ++y_line;
        }
    }
    m_line+=fm[i];
}
cout<<"连通区域个数"<<y_line<<endl;
cout<<"连通区域的总积"<<m_line<<endl;
for(i=0;i<y_line;i++)
{
    cout<<"连通区域:"<<i+1<<"该区域周长:"<<fn[i]<<endl;
}
cvCopy(imgZhouchang,src);
    cvReleaseImage(&temp);
        cvReleaseImage(&imgZhouchang);
 
}