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You cannot train YOLO with OpenCV - you can just use it as a detector WITHOUT Nvidia GPU SUPPORT - which means it is going to be quite slow. If you want to train YOLO for your custom objects you have to compile it from source and follow the instructions. Compilation on Ubuntu is quite straightforward but installing CUDA was quite painful. On the other hand, compilation on Windows is a bit troublesome but I do not recall any problems with CUDA and other prerequisites. If you want to detect object using Nvidia GPU you also need to use the original version, but you may easily combine it with OpenCV.

You cannot train YOLO with OpenCV - you can just use it as a detector WITHOUT Nvidia GPU SUPPORT - which means it is going to be quite slow. If you want to train YOLO for your custom objects you have to compile it from source and follow the instructions. Compilation on Ubuntu is quite straightforward but installing CUDA was quite painful. On the other hand, compilation on Windows is a bit troublesome but I do not recall any problems with CUDA and other prerequisites. If you want to detect object using Nvidia GPU you also need to use the original version, but you may easily combine it with OpenCV.