'class cv::BackgroundSubtractorMOG2' has no member named 'operator()' - opencv3.0

Question

I am trying to compile this c++ application
int main ()
{
Mat frame;
Mat back;
Mat fore;
VideoCapture cap1;
cap1.open(0); /*to capture from camera*/
cv::Ptr<BackgroundSubtractorMOG> pMOG = createBackgroundSubtractorMOG();
cv::Ptr<BackgroundSubtractorMOG2> pMOG2 = createBackgroundSubtractorMOG2();
pMOG2->setNMixtures(10);
vector < vector < Point > >contours;
namedWindow ("Frame");
int i=0;
for (;;)
{
cap1 >> frame;
pMOG2->operator()(frame, fore);
pMOG2->getBackgroundImage (back);
erode (fore, fore, cv::Mat ());
erode (fore, fore, cv::Mat ());
dilate (fore, fore, cv::Mat ());
dilate (fore, fore, cv::Mat ());
dilate (fore, fore, cv::Mat ());
findContours (fore, contours, CV_RETR_EXTERNAL,CV_CHAIN_APPROX_NONE);
drawContours (frame, contours, -1, Scalar (255, 255, 255), 1);
Scalar color = Scalar(200,200,200);
int a=0;
vector<Rect> boundRect( contours.size() );
for( int i = 0; i < contours.size(); i++ )
{
boundRect[i] = boundingRect( contours[i] );
}
for( i = 0; i< contours.size(); i++ )
{
if(boundRect[i].width>=40 || boundRect[i].height>=40)//eliminates small boxes
{
a=a+(boundRect[i].height)*(boundRect[i].width);
}
// cout<<"Net contour area is "<<a<<"\n";
if(a>=int(frame.rows)*int(frame.cols)/2)//change denominator as per convenience
{
putText(frame,"Tampering",Point(5,30),FONT_HERSHEY_SIMPLEX,1,Scalar(0,255,255),2);
cout<<"\a";
}
}
imshow ("Frame", frame);
waitKey(10);
}
I am getting the following error while compiling
error:
Tampering.cpp:27:21: error: 'class cv::BackgroundSubtractorMOG2' has
no member named 'operator()'
pMOG2->operator()(frame, fore);
my opencv version-3.3.0
Thanks in advance

Answer 1

Firstly, thanks for subscribing to my repository: https://github.com/SaranshKejriwal/Tampering-Detection/blob/master/Tampering%20main/Tampering.cpp
In my case, I had used openCV 2.4.5, which has the operator() method within the BackgroundSubtractorMOG2 class.
Since you are using openCV 3.3.0, I encourage you to have a look at the documentation, to verify that this method still exists