关于图像识别的问题

void __fastcall CalCount(rgb_str rgb[DATA][DATA],int h,int w,TPoint pt,int &count,int &x0,int &y0,int &r)
{
   int rd1=0,rd2=0,rd0=0,x1,y1,x2,y2;
     int i,j;
     count=0;
     for(i=pt.x;i>5;i--)
     {
       rd1=abs((rgb[i][pt.y].r_color-rgb[i-1][pt.y].r_color));
       rd2=abs((rgb[i-1][pt.y].r_color-rgb[i-2][pt.y].r_color));
       if(rd1<rd2&&rd2>rd0)
        { rd0=rd2;x1=i-1;}
     }                                         //求左点；
      rd0=0;
      for(i=pt.x;i<w-5;i++)
     {
       rd1=abs((rgb[i][pt.y].r_color-rgb[i+1][pt.y].r_color));
       rd2=abs((rgb[i+1][pt.y].r_color-rgb[i+2][pt.y].r_color));
       if(rd1<rd2&&rd2>rd0)
        { rd0=rd2;x2=i+1;}
     }                                          //求右点；
        x0=(x1+x2)/2;                           //求中点x；
        rd0=0;
      for(i=x0;i>5;i--)
     {
       rd1=abs((rgb[x0][i].r_color-rgb[x0][i-1].r_color));
       rd2=abs((rgb[x0][i-1].r_color-rgb[x0][i-2].r_color));
       if(rd1<rd2&&rd2>rd0)
        { rd0=rd2;y1=i-1;}
     }                                            //求中点对应的上界点；
           rd0=0;
        for(i=x0;i<h-5;i++)
     {
       rd1=abs((rgb[x0][i].r_color-rgb[x0][i+1].r_color));
       rd2=abs((rgb[x0][i+1].r_color-rgb[x0][i+2].r_color));
       if(rd1<rd2&&rd2>rd0)
        { rd0=rd2;y2=i+1;}                      //求中点对应的下界点；
     }                                           //求中点y;
       y0=(y1+y2)/2;     r=(y2-y1)/2;
     rd0=0;                                         //求蛋内点count;
    for(i=x0;i>5;i--)
    {
       rd1=abs((rgb[i][y0].r_color-rgb[i-1][y0].r_color));
       rd2=abs((rgb[i-1][y0].r_color-rgb[i-2][y0].r_color));
       if(rd1<rd2&&rd2>rd0)
        { rd0=rd2;x1=i-1;}
    }
   r=r<(x0-x1)?r:(x0-x1);   for(j=y1;j<=y2;j++)
   {
      rd0=0;
      for(i=x0;i>5;i--)
     {
       rd1=abs((rgb[i][j].r_color-rgb[i-1][j].r_color));
       rd2=abs((rgb[i-1][j].r_color-rgb[i-2][j].r_color));
       if(rd1<rd2&&rd2>rd0)
        { rd0=rd2;x1=i-1;}
     }
      rd0=0;
      for(i=x0;i<w-5;i++)
     {
       rd1=abs((rgb[i][j].r_color-rgb[i+1][j].r_color));
       rd2=abs((rgb[i+1][j].r_color-rgb[i+2][j].r_color));
       if(rd1<rd2&&rd2>rd0)
        { rd0=rd2;x2=i+1;}
     }
      count+=x2-x1;
   }
}给一段代码!