The `ppn2ocr` script produces a workspace and METS file with the best images for
a given document in the State Library Berlin (SBB)'s digitized collection.
a given document in the Berlin State Library (SBB)'s digitized collection.
Install it with an up-to-date pip (otherwise this will fail due to [a opencv-python-headless build failure](https://github.com/skvark/opencv-python#frequently-asked-questions)):