I am trying to detect whether 2 Regions of Interest (CvRects) are intersecting one another in OpenCV. I can obviously manually type several (or rather a lot of) conditions to be checked but that wouldn't really be a good way to do it (imo).
Can anyone suggest me any other solution? Is there a ready method in OpenCV for that ?
I do not know of any ready-made solution for the C interface (CvRect), but if you use the C++ way (cv::Rect), you can easily say
interesect = r1 & r2;
The complete list of operations on rectangles is
// In addition to the class members, the following operations
// on rectangles are implemented:
// (shifting a rectangle by a certain offset)
// (expanding or shrinking a rectangle by a certain amount)
rect += point, rect -= point, rect += size, rect -= size (augmenting operations)
rect = rect1 & rect2 (rectangle intersection)
rect = rect1 | rect2 (minimum area rectangle containing rect2 and rect3 )
rect &= rect1, rect |= rect1 (and the corresponding augmenting operations)
rect == rect1, rect != rect1 (rectangle comparison)