https://blog.csdn.net/qq_37674858/article/details/80340914
cmd: tesseract [***.tif] [out_put_file] -l [exists_training_data] batch.nochop makebox
eg: tesseract 111.tif my.font.exp0 -l chi_sim batch.nochop makebox
echo font 0 0 0 0 0 >font_properties
cmd: tesseract [***.tif] [box_file] nobatch box.train
eg: tesseract my.font.exp0.tif my.font.exp0 nobatch box.train
cmd: unicharset_extractor [box_file]
eg: unicharset_extractor my.font.exp0.box
cmd: mftraining -F [font_properties] -U [unicharset] -O [.tr]
cntraining [.tr]
eg: mftraining -F font_properties -U unicharset -O my.unicharset my.font.exp0.tr
cntraining my.font.exp0.tr
cmd: combine_tessdata [prefix]
eg: combine_tessdata my.