OpenCV 4.7 includes Aruco in objdetect module

[AlejandroSilvestri]

A few weeks ago I tried installing stella_vslam along with opencv 4.7 . It worked, except for Aruco.

Opencv 4.7 adopts Aruco in main code, you no longer need to install contrib to use it. The only drawback is they change the name from PREDEFINED_DICTIONARY_NAME to PredefinedDictionaryType.

It seems that the only line where this change is necessary is in aruco.cc line 12.

stella_vslam asks for opencv 3, so this isn't an issue, but it seems to me it worth having the compatibility with 4.7 and future opencv versions. It implies some #if CV_VERSION_MAJOR==4... in aruco.cc, and modification in cmake to change the shared library.

See Aruco markers, module functionality was moved to objdetect module:
https://docs.opencv.org/4.7.0/d9/d6a/group__aruco.html