shapeclustering - shape clustering training for Tesseract

       The Tesseract OCR engine was written by Ray Smith and his research groups at Hewlett Packard (1985-1995)
       and Google (2006-2018).

                                                   01/19/2025                                 SHAPECLUSTERING(1)

       Copyright (C) Google, 2011 Licensed under the Apache License, Version 2.0

shapeclustering(1) takes extracted feature .tr files (generated by tesseract(1) run in a special mode
       from box files) and produces a file shapetable and an enhanced unicharset. This program is still
       experimental, and is not required (yet) for training Tesseract.

       shapeclustering - shape clustering training for Tesseract

       -U FILE
           The unicharset generated by unicharset_extractor(1).

       -D dir
           Directory to write output files to.

       -F font_properties_file
           (Input) font properties file, where each line is of the following form, where each field other than
           the font name is 0 or 1:

               'font_name' 'italic' 'bold' 'fixed_pitch' 'serif' 'fraktur'

       -X xheights_file
           (Input) x heights file, each line is of the following form, where xheight is calculated as the pixel
           x height of a character drawn at 32pt on 300 dpi. [ That is, if base x height + ascenders +
           descenders = 133, how much is x height? ]

               'font_name' 'xheight'

       -O FILE
           The output unicharset that will be given to combine_tessdata(1).

tesseract(1), cntraining(1), unicharset_extractor(1), combine_tessdata(1), unicharset(5)

       https://tesseract-ocr.github.io/tessdoc/Training-Tesseract.html

       shapeclustering -D output_dir -U unicharset -O mfunicharset -F font_props -X xheightsFILE...