MSER circles center -

i`m using mser feature detector detect circles image , works perfect have center of circles. know posibility center? here source code:

void main() {   mat inimg = imread(cprofilessuro1012desktop1.bmp);   mat textimg;  cvtcolor(inimg, textimg, cv_bgr2gray);   vector vector point  contours;  vector rect bboxes;  ptr mser mser = msercreate(22, (int)(0.00001textimg.colstextimg.rows), (int)(0.00015textimg.colstextimg.rows), 1, 1);   mser-detectregions(textimg, contours, bboxes);    for(int i=0;i1;i++)     { for(int j=0;jcontours[i].size();j++)      cout   x=contours[i][j].x y=contours[i][j].y endl;     coutendl;  }  (int = 0;  bboxes.size(); i++)  {     cout   x=bboxes[i].x y=bboxes[i].y endl;   rectangle(inimg, bboxes[i], cv_rgb(0, 255, 0));  }  cout  contours[0].size()endl;  imshow(, inimg);  waitkey(0);  } 

what did:

float sumx = 0, sumy = 0; int size = contours.size(); point2f centroid; if(size > 0){      for(int i=0;i<size;i++)     {         for(int j=0;j<contours[i].size();j++)         {         sumx += contours[i][j].x;         sumy += contours[i][j].y;         }          centroid.x = sumx/contours[i].size();  centroid.y = sumy/contours[i].size();  cout<<centroid.x<<" " <<centroid.y<<endl;  sumx=0;  sumy=0;     }