I have read some tutorials saying that before opencv4 CUDA was not active so that you had to rebuild OpenCV4 from source.
I also did
$ python >>> import cv2 >>> print cv2.getBuildInformation()
and I could indeed see that I could not use CUDA.
However the latest news is that now with the latest JetPack, it comes with OpenCV4…1.1
My question is, do I still have to rebuild OpenCV4 from source to use CUDA?