‘calibrateCamera’ was not declared in this scope

Question

I tried to get the camera matrix using calibrateCamera() function:

double x= calibrateCamera(objectPoints,imagePoints,imageSize,cameraMatrix,distCoeffs,rvecs,tvecs,0);

and i got

‘calibrateCamera’ was not declared in this scope

i didn't forgot to write

using namespace cv;

what can it be?

thanks in advance.

Answer 1

ok i got it:

i was missing the header:

#include "opencv2/calib3d/calib3d.hpp"

thanks anyway