Equivalent to cvSetImageROI in the OpenCV C++ interface

c++, opencv

Solution

Actually, it's right on the docs. Shame on me.

//Make a rectangle
Rect roi(10, 20, 100, 50);
//Point a cv::Mat header at it (no allocation is done)
Mat image_roi = image(roi)

Problem

I'm migrating an old test application from the OpenCV C interface to the new C++ interface (I wish to learn it). What's the equivalent, using the C++ interface, of `cvSetImageROI` and `cvResetImageROI`? I couldn't find it in the documentation.

Original source