Fonts

Fonts for Tesseract training

Tesseract training can use images made from text which was rendered with a list of fonts. Those fonts must be available on the host where the training process is running.

The required fonts are defined in training/language-specific.sh.

Find Fonts

To find fonts already installed on your system which will render a given training text, you can use the following command (change the language code and directory locations to match your setup). fontslist.txt will provide text that can be used in training/language-specific.sh.

text2image --find_fonts \
--fonts_dir /usr/share/fonts \
--text ../langdata/hin/hin.training_text \
--min_coverage .9  \
--outputbase ../langdata/hin/hin \
|& grep raw | sed -e 's/ :.*/" \\/g'  | sed -e 's/^/  "/' >../langdata/hin/fontslist.txt

The above will not work for Fraktur fonts, it will identify all Latin fonts also. Review the generated images and choose appropriate fonts.

Font installation

Debian

On Debian GNU Linux and similar distributions (Linux Mint, Ubuntu, ...), the required fonts can be installed like that:

# AMHARIC_FONTS (todo)
# ANCIENT_GREEK_FONTS (todo)
# ARABIC_FONTS (todo)
# ARMENIAN_FONTS (todo)
# BENGALI_FONTS (todo)
# BURMESE_FONTS (todo)
# CHI_SIM_FONTS (todo)
# CHI_TRA_FONTS (todo)

# DEVANAGARI_FONTS (see also external links below)
apt-get install fonts-deva

# EARLY_LATIN_FONTS (todo)
# FRAKTUR_FONTS (todo)
# GEORGIAN_FONTS (todo)
# GREEK_FONTS (todo)
# GUJARATI_FONTS (todo)
# HEBREW_FONTS (todo)
# JPN_FONTS (todo)
# KANNADA_FONTS (todo)
# KHMER_FONTS (todo)
# KOREAN_FONTS (todo)
# KURDISH_FONTS (todo)
# KYRGYZ_FONTS (todo)
# LAOTHIAN_FONTS (todo)

# LATIN_FONTS
apt-get install fonts-dejavu gsfonts ttf-mscorefonts-installer

# MALAYALAM_FONTS (todo)

# NEOLATIN_FONTS (still incomplete)
apt-get install fonts-ebgaramond fonts-gfs-didot fonts-gfs-didot-classic fonts-junicode

# NORTH_AMERICAN_ABORIGINAL_FONTS (todo)
# OLD_GEORGIAN_FONTS (todo)
# ORIYA_FONTS (todo)
# PERSIAN_FONTS (todo)
# PUNJABI_FONTS (todo)
# RUSSIAN_FONTS (todo)
# SINHALA_FONTS (todo)
# SYRIAC_FONTS (todo)
# TAMIL_FONTS (todo)
# TELUGU_FONTS (todo)
# THAANA_FONTS (todo)
# THAI_FONTS (todo)
# TIBETAN_FONTS (todo)
# VERTICAL_FONTS (todo)
# VIETNAMESE_FONTS (todo)

The installed fonts are shown by the command fc-list. See also the Debian wiki.

Links

Sources of (mostly free) fonts

Latin Fonts

• https://fontlibrary.org/en (GFS Bodoni)
• https://fonts.google.com/
• http://iginomarini.com/fell/the-revival-fonts/
• http://scholarsfonts.net/ (Cardo)
• http://scripts.sil.org/cms/scripts/page.php?site_id=nrsi&id=FontDownloads (SIL Fonts)
• http://www.ctan.org/tex-archive/fonts (GFS Bodoni)
• http://www.steffmann.de/wordpress/test-2/

Devanagari Fonts

• Aksharayogini2

• AksharayoginiBoldItalic

• AksharayoginiBold

• AksharayoginiItalic

• Aksharayogini

• AnnapurnaSIL

• CDAC-Surekh Bold

• CDAC-Surekh Normal

• CDAC-Yogesh Bold

• CDAC-Yogesh Italic

• CDAC-Yogesh Normal

• Chandas

• Lohit Devanagari

• Nakula

• Sahadeva

• Sanskrit2003

• Santipur OT

• Shobhika

• Shree-DV0726-OT

• Siddhanta

• Uttara

• Yashomudra Fonts

• Google Devanagari Fonts

• Linked from Bihar Vidhan Parishad

• Linked from bih.nic.in

Fraktur Fonts

• http://unifraktur.sourceforge.net/maguntia.html (UnifrakturMaguntia)
• http://www.orbitals.com/self/ligature/ligature.htm (Wyld)
• https://www.fontyukle.net/de/1,Walbaum
• http://de.ffonts.net/Walbaum-Fraktur.font.download
• http://www.1001fonts.com/fraktur-fonts.html
• http://www.dafont.com/fette-unz-fraktur.font
• http://www.1001freefonts.com/fette_fraktur.font

More information on fonts

• https://en.wikipedia.org/wiki/Fraktur
• http://www.orbitals.com/self/ligature/ligature.htm 18th Century Ligatures and Fonts
• http://www.steffmann.de/wordpress/ (German)