Hi,
Might people be willing to test out howdy:
https://github.com/boltgolt/howdy
This has been packaged for Fedora and is in COPR:
https://copr.fedorainfracloud.org/coprs/luya/howdy/
Howdy uses a convolutional neural network:
http://dlib.net/cnn_face_detector.py.html
Some explanation is here:
https://towardsdatascience.com/cnn-based-face-detector-from-dlib-c3696195...
In addition to accuracy, speed may be of interest since one of the
algorithms makes heavy use of GPU acceleration.
Benson