image processing - Hough Circle in c# , dynamic memory -

i have problem in dynamic memory allocation getting data matrix

image image_gray = new image("im1.jpg"); matrix circles = new matrix(100, 1, 3); 

question 1: how can locate dynamic memory because don't know number of circles?

emgu.cv.cvinvoke.cvhoughcircles(image_gray, circles, hough_type.cv_hough_gradient,     2, 100, 200, 100, 10, 500); 

question 2: circle matrix [100 ,3], how can get

point center= round (circle[i][1], circle[i][1]) 

how can

int radius= circle[i][2];  

what should loop data matrix , casting should point , int.

i tried (not working / error)

for (int i=0; < circles.rows; i++)  { matrix entry = circles.getrow(i);   float x = entry[0];   float y = entry[1];  float r = entry[2];} // not working 

because instead of copying (required) (i) row copies whole matrix( circles) , float x=......gives errors

no overload method 'this' takes '1' arguments 

please me in regard

regards

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sorry answer question. please give hint dynamic memory allocation , matrix data

the documentation suggests grow matrix fit, contradicts that, honestly, try 1 row 1 col matrix on image more circles , see gives you. see you're using matrix type - don't know how convert intptr needed cvhoughcircles, should straight forward iterate on each row , pull out results, 3 floats: (x, y, r) -

for (int i=0; < circles.cols; i++) {     matrix<float> entry = circles.getrow(i);     float x = entry[0]; // guessing here - doc'n awful     float y = entry[1];     float r = entry[2]; }