c++ - OpenCV: How to pass cv::Ptr as argument? -

c++ - OpenCV: How to pass cv::Ptr as argument? -

i need pass cv::ptr argument function , not sure how it. shall pass reference, or value? know std::auto_ptr pretty ugly if pass value , not reference.

so:

void foo(cv::ptr<cv::featuredetector> detector) { /*...*/ }

or

void foo(cv::ptr<cv::featuredetector>& detector) { /*...*/ }

?

and, if utilize const, difference:

void foo(const cv::ptr<cv::featuredetector> detector) { /*...*/ } void foo(const cv::ptr<cv::featuredetector>& detector) { /*...*/ }

?

cv::ptr object. see other related questions , answers this: how pass objects functions in c++?

c++ opencv