ocrd >= 1.0.0b10

git+https://github.com/seuretm/ocrd_typegroups_classifier.git

https://github.com/mikegerber/ocrd_kraken/archive/fix/pass-down-page-id.tar.gz # XXX ocrd_kraken >= 0.1.1

tesserocr == 2.3.1  # 2.4.0 fails with Ubuntu 18.04's tesseract
ocrd_tesserocr