'Using OpenCV Old Interface with OpenCV4 Library

I have an old C++ project which uses OpenCV 2.4.9, but I need to use some features from OpenCV4, so I want to upgrade My OpenCV library to version 4.

I don't want to change the old existing code. So, is there a way to upgrade to OpenCV4 but still using old OpenCV 2.4.9 interface?

cv::BackgroundSubtractorMOG2 and cv::MSER are used which their interfaces have changed.

c++opencv


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