Each ipynb file corresponds to a book, because the images scaned from different books have different noises.
The cropped results are in this folder: https://drive.google.com/drive/folders/1eDwHyiNaMLggn0giA-5hP7X61i0ppHbj
Please contact @tianrengao and @BohanZhai if you have any questions.
Here is an example from Banpo A Khrid Texts
:
After cropping, the image is split into 5 pieces: