Detect face then autocrop pictures

Question

I am trying to find an app that can detect faces in my pictures, make the detected face centered and crop 720 x 720 pixels of the picture. It is rather very time consuming &

Answer 1

facedetect

https://github.com/wavexx/facedetect is a nice Python OpenCV CLI wrapper, and I have just added that example to their README using ImageMagick:

for file in path/to/pictures/*.jpg; do
  name=$(basename "$file")
  i=0
  facedetect "$file" | while read x y w h; do
    convert "$file" -crop ${w}x${h}+${x}+${y} "path/to/faces/${name%.*}_${i}.${name##*.}"
    i=$(($i+1))
  done
done

Tested on Ubuntu 16.04 with thousands of (unlabeled) Facebook profile pictures, see: https://github.com/cirosantilli/art/tree/d4352a46064d156591817c4eae5199f5ac8f23be/facebook