Fonts being used in engineering drawings

[Олександр Вітер]

I have a drawings (see picture). I have a font used on them. Trying to teach tesseract with no success

And here is my output:

./tesstrain.sh --lang eng --langdata_dir /usr/share/tesseract-ocr/langdata --tessdata_dir /usr/share/tesseract-ocr/tessdata --fonts_dir fonts --fontlist "PAS_GTNF"

=== Starting training for language 'eng'
[Fri Apr 22 15:23:14 UTC 2022] /usr/bin/text2image --fonts_dir=fonts --font=PAS_GTNF --outputbase=/tmp/font_tmp.cCxEGH0jBv/sample_text.txt --text=/tmp/font_tmp.cCxEGH0jBv/sample_text.txt --fontconfig_tmpdir=/tmp/font_tmp.cCxEGH0jBv
Stripped 1 unrenderable words
Rendered page 0 to file /tmp/font_tmp.cCxEGH0jBv/sample_text.txt.tif

=== Phase I: Generating training images ===
Rendering using PAS_GTNF
[Fri Apr 22 15:23:14 UTC 2022] /usr/bin/text2image --fontconfig_tmpdir=/tmp/font_tmp.cCxEGH0jBv --fonts_dir=fonts --strip_unrenderable_words --leading=32 --char_spacing=0.0 --exposure=0 --outputbase=/tmp/tmp.lJZrntRcEh/eng/eng.PAS_GTNF.exp0 --max_pages=3 --font=PAS_GTNF --text=/usr/share/tesseract-ocr/langdata/eng/eng.training_text
Stripped 5 unrenderable words
Rendered page 0 to file /tmp/tmp.lJZrntRcEh/eng/eng.PAS_GTNF.exp0.tif

=== Phase UP: Generating unicharset and unichar properties files ===
[Fri Apr 22 15:23:15 UTC 2022] /usr/bin/unicharset_extractor --output_unicharset /tmp/tmp.lJZrntRcEh/eng/eng.unicharset --norm_mode 1 /tmp/tmp.lJZrntRcEh/eng/eng.PAS_GTNF.exp0.box
Extracting unicharset from box file /tmp/tmp.lJZrntRcEh/eng/eng.PAS_GTNF.exp0.box
Other case D of d is not in unicharset
Other case N of n is not in unicharset
Other case p of P is not in unicharset
Other case M of m is not in unicharset
Other case H of h is not in unicharset
Other case T of t is not in unicharset
Other case R of r is not in unicharset
Other case G of g is not in unicharset
Other case E of e is not in unicharset
Other case J of j is not in unicharset
Other case I of i is not in unicharset
Other case F of f is not in unicharset
Other case K of k is not in unicharset
Wrote unicharset file /tmp/tmp.lJZrntRcEh/eng/eng.unicharset
[Fri Apr 22 15:23:15 UTC 2022] /usr/bin/set_unicharset_properties -U /tmp/tmp.lJZrntRcEh/eng/eng.unicharset -O /tmp/tmp.lJZrntRcEh/eng/eng.unicharset -X /tmp/tmp.lJZrntRcEh/eng/eng.xheights --script_dir=/usr/share/tesseract-ocr/langdata
Loaded unicharset of size 32 from file /tmp/tmp.lJZrntRcEh/eng/eng.unicharset
Setting unichar properties
Other case D of d is not in unicharset
Other case N of n is not in unicharset
Other case p of P is not in unicharset
Other case M of m is not in unicharset
Other case H of h is not in unicharset
Other case T of t is not in unicharset
Other case R of r is not in unicharset
Other case G of g is not in unicharset
Other case E of e is not in unicharset
Other case J of j is not in unicharset
Other case I of i is not in unicharset
Other case F of f is not in unicharset
Other case K of k is not in unicharset
Setting script properties
Failed to load script unicharset from:/usr/share/tesseract-ocr/langdata/Latin.unicharset

Warning: properties incomplete for index 3 = d
Warning: properties incomplete for index 4 = \
Warning: properties incomplete for index 5 = 0

Warning: properties incomplete for index 6 = .