I found Mathematica can use OpenCV to improve face recognition in FindFaces: how to improve the results of the face recognition feature.
But I tried this way and the kernel crashed.
URLDownload["https://raw.githubusercontent.com/nagadomi/lbpcascade_animeface/master/lbpcascade_animeface.xml","lbpcascade_animeface.xml"]; FindFaces[img,"Image","TrainingFile" ->"lbpcascade_animeface.xml"]
Then I found that even using the files in the distribution will still cause kernel shut down.
Notice that the number disappears, the code highlight disappears, the calculation does not continue, the kernel has stopped working at this time.
Can someone else reproduce this situation, is this a bug?