Tesseract is an optical character recognition engine for various operating systems. It is free software, released under the Apache License, Version 2.0, and development has been sponsored by Google since 2006.
In 2006, Tesseract was considered one of the most accurate open-source OCR engines then available.
repository: https://github.com/tesseract-ocr/tesseract
Step 1: Find available yum packages:
[root@tutorialspots ~]# yum list|grep tesseract tesseract.x86_64 3.04.00-3.el7 epel tesseract-debuginfo.x86_64 3.02.02-4.el7.nux nux-dextop tesseract-devel.x86_64 3.04.00-3.el7 epel tesseract-langpack-afr.noarch 3.04.00-3.el7 epel tesseract-langpack-amh.noarch 3.04.00-3.el7 epel tesseract-langpack-ara.noarch 3.04.00-3.el7 epel tesseract-langpack-asm.noarch 3.04.00-3.el7 epel tesseract-langpack-aze.noarch 3.04.00-3.el7 epel tesseract-langpack-aze_cyrl.noarch 3.04.00-3.el7 epel tesseract-langpack-bel.noarch 3.04.00-3.el7 epel tesseract-langpack-ben.noarch 3.04.00-3.el7 epel tesseract-langpack-bod.noarch 3.04.00-3.el7 epel tesseract-langpack-bos.noarch 3.04.00-3.el7 epel tesseract-langpack-bul.noarch 3.04.00-3.el7 epel tesseract-langpack-cat.noarch 3.04.00-3.el7 epel tesseract-langpack-ceb.noarch 3.04.00-3.el7 epel tesseract-langpack-ces.noarch 3.04.00-3.el7 epel tesseract-langpack-chi_sim.noarch 3.04.00-3.el7 epel tesseract-langpack-chi_tra.noarch 3.04.00-3.el7 epel tesseract-langpack-chr.noarch 3.04.00-3.el7 epel tesseract-langpack-cym.noarch 3.04.00-3.el7 epel tesseract-langpack-dan.noarch 3.04.00-3.el7 epel tesseract-langpack-dan_frak.noarch 3.04.00-3.el7 epel tesseract-langpack-deu.noarch 3.04.00-3.el7 epel tesseract-langpack-deu_frak.noarch 3.04.00-3.el7 epel tesseract-langpack-dzo.noarch 3.04.00-3.el7 epel tesseract-langpack-ell.noarch 3.04.00-3.el7 epel tesseract-langpack-enm.noarch 3.04.00-3.el7 epel tesseract-langpack-epo.noarch 3.04.00-3.el7 epel tesseract-langpack-equ.noarch 3.04.00-3.el7 epel tesseract-langpack-est.noarch 3.04.00-3.el7 epel tesseract-langpack-eus.noarch 3.04.00-3.el7 epel tesseract-langpack-fas.noarch 3.04.00-3.el7 epel tesseract-langpack-fin.noarch 3.04.00-3.el7 epel tesseract-langpack-fra.noarch 3.04.00-3.el7 epel tesseract-langpack-frk.noarch 3.04.00-3.el7 epel tesseract-langpack-frm.noarch 3.04.00-3.el7 epel tesseract-langpack-gle.noarch 3.04.00-3.el7 epel tesseract-langpack-glg.noarch 3.04.00-3.el7 epel tesseract-langpack-grc.noarch 3.04.00-3.el7 epel tesseract-langpack-guj.noarch 3.04.00-3.el7 epel tesseract-langpack-hat.noarch 3.04.00-3.el7 epel tesseract-langpack-heb.noarch 3.04.00-3.el7 epel tesseract-langpack-hin.noarch 3.04.00-3.el7 epel tesseract-langpack-hrv.noarch 3.04.00-3.el7 epel tesseract-langpack-hun.noarch 3.04.00-3.el7 epel tesseract-langpack-iku.noarch 3.04.00-3.el7 epel tesseract-langpack-ind.noarch 3.04.00-3.el7 epel tesseract-langpack-isl.noarch 3.04.00-3.el7 epel tesseract-langpack-ita.noarch 3.04.00-3.el7 epel tesseract-langpack-ita_old.noarch 3.04.00-3.el7 epel tesseract-langpack-jav.noarch 3.04.00-3.el7 epel tesseract-langpack-jpn.noarch 3.04.00-3.el7 epel tesseract-langpack-kan.noarch 3.04.00-3.el7 epel tesseract-langpack-kat.noarch 3.04.00-3.el7 epel tesseract-langpack-kat_old.noarch 3.04.00-3.el7 epel tesseract-langpack-kaz.noarch 3.04.00-3.el7 epel tesseract-langpack-khm.noarch 3.04.00-3.el7 epel tesseract-langpack-kir.noarch 3.04.00-3.el7 epel tesseract-langpack-kor.noarch 3.04.00-3.el7 epel tesseract-langpack-kur.noarch 3.04.00-3.el7 epel tesseract-langpack-lao.noarch 3.04.00-3.el7 epel tesseract-langpack-lat.noarch 3.04.00-3.el7 epel tesseract-langpack-lav.noarch 3.04.00-3.el7 epel tesseract-langpack-lit.noarch 3.04.00-3.el7 epel tesseract-langpack-mal.noarch 3.04.00-3.el7 epel tesseract-langpack-mar.noarch 3.04.00-3.el7 epel tesseract-langpack-mkd.noarch 3.04.00-3.el7 epel tesseract-langpack-mlt.noarch 3.04.00-3.el7 epel tesseract-langpack-msa.noarch 3.04.00-3.el7 epel tesseract-langpack-mya.noarch 3.04.00-3.el7 epel tesseract-langpack-nep.noarch 3.04.00-3.el7 epel tesseract-langpack-nld.noarch 3.04.00-3.el7 epel tesseract-langpack-nor.noarch 3.04.00-3.el7 epel tesseract-langpack-ori.noarch 3.04.00-3.el7 epel tesseract-langpack-pan.noarch 3.04.00-3.el7 epel tesseract-langpack-pol.noarch 3.04.00-3.el7 epel tesseract-langpack-por.noarch 3.04.00-3.el7 epel tesseract-langpack-pus.noarch 3.04.00-3.el7 epel tesseract-langpack-ron.noarch 3.04.00-3.el7 epel tesseract-langpack-rus.noarch 3.04.00-3.el7 epel tesseract-langpack-san.noarch 3.04.00-3.el7 epel tesseract-langpack-sin.noarch 3.04.00-3.el7 epel tesseract-langpack-slk.noarch 3.04.00-3.el7 epel tesseract-langpack-slk_frak.noarch 3.04.00-3.el7 epel tesseract-langpack-slv.noarch 3.04.00-3.el7 epel tesseract-langpack-spa.noarch 3.04.00-3.el7 epel tesseract-langpack-spa_old.noarch 3.04.00-3.el7 epel tesseract-langpack-sqi.noarch 3.04.00-3.el7 epel tesseract-langpack-srp.noarch 3.04.00-3.el7 epel tesseract-langpack-srp_latn.noarch 3.04.00-3.el7 epel tesseract-langpack-swa.noarch 3.04.00-3.el7 epel tesseract-langpack-swe.noarch 3.04.00-3.el7 epel tesseract-langpack-syr.noarch 3.04.00-3.el7 epel tesseract-langpack-tam.noarch 3.04.00-3.el7 epel tesseract-langpack-tel.noarch 3.04.00-3.el7 epel tesseract-langpack-tgk.noarch 3.04.00-3.el7 epel tesseract-langpack-tgl.noarch 3.04.00-3.el7 epel tesseract-langpack-tha.noarch 3.04.00-3.el7 epel tesseract-langpack-tir.noarch 3.04.00-3.el7 epel tesseract-langpack-tur.noarch 3.04.00-3.el7 epel tesseract-langpack-uig.noarch 3.04.00-3.el7 epel tesseract-langpack-ukr.noarch 3.04.00-3.el7 epel tesseract-langpack-urd.noarch 3.04.00-3.el7 epel tesseract-langpack-uzb.noarch 3.04.00-3.el7 epel tesseract-langpack-uzb_cyrl.noarch 3.04.00-3.el7 epel tesseract-langpack-vie.noarch 3.04.00-3.el7 epel tesseract-langpack-yid.noarch 3.04.00-3.el7 epel tesseract-osd.x86_64 3.04.00-3.el7 epel
Step 2: install tesseract
[root@tutorialspots ~]# yum install tesseract -y Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile epel/x86_64/metalink | 17 kB 00:00 * base: mirrors.umflint.edu * epel: fedora-epel.mirror.lstn.net * extras: centos.den.host-engine.com * ius: dfw.mirror.rackspace.com * nux-dextop: mirror.li.nux.ro * remi-safe: mirror.bebout.net * updates: centos.den.host-engine.com base | 3.6 kB 00:00 epel | 3.2 kB 00:00 extras | 3.4 kB 00:00 ius | 2.3 kB 00:00 mysql-connectors-community | 2.5 kB 00:00 mysql-tools-community | 2.5 kB 00:00 mysql57-community | 2.5 kB 00:00 nodesource | 2.5 kB 00:00 nux-dextop | 2.9 kB 00:00 remi-safe | 2.9 kB 00:00 updates | 3.4 kB 00:00 (1/2): ius/x86_64/primary_db | 392 kB 00:00 (2/2): remi-safe/7/primary_db | 1.3 MB 00:01 Resolving Dependencies --> Running transaction check ---> Package tesseract.x86_64 0:3.04.00-3.el7 will be installed --> Processing Dependency: liblept.so.4()(64bit) for package: tesseract-3.04.00- 3.el7.x86_64 --> Running transaction check ---> Package leptonica.x86_64 0:1.72-2.el7 will be installed --> Processing Dependency: libgif.so.4()(64bit) for package: leptonica-1.72-2.el 7.x86_64 --> Running transaction check ---> Package giflib.x86_64 0:4.1.6-9.el7 will be installed --> Finished Dependency Resolution Dependencies Resolved ================================================================================ Package Arch Version Repository Size ================================================================================ Installing: tesseract x86_64 3.04.00-3.el7 epel 11 M Installing for dependencies: giflib x86_64 4.1.6-9.el7 base 40 k leptonica x86_64 1.72-2.el7 epel 928 k Transaction Summary ================================================================================ Install 1 Package (+2 Dependent packages) Total download size: 12 M Installed size: 43 M Downloading packages: (1/3): giflib-4.1.6-9.el7.x86_64.rpm | 40 kB 00:00 (2/3): leptonica-1.72-2.el7.x86_64.rpm | 928 kB 00:00 (3/3): tesseract-3.04.00-3.el7.x86_64.rpm | 11 MB 00:00 -------------------------------------------------------------------------------- Total 14 MB/s | 12 MB 00:00 Running transaction check Running transaction test Transaction test succeeded Running transaction Installing : giflib-4.1.6-9.el7.x86_64 1/3 Installing : leptonica-1.72-2.el7.x86_64 2/3 Installing : tesseract-3.04.00-3.el7.x86_64 3/3 Verifying : tesseract-3.04.00-3.el7.x86_64 1/3 Verifying : giflib-4.1.6-9.el7.x86_64 2/3 Verifying : leptonica-1.72-2.el7.x86_64 3/3 Installed: tesseract.x86_64 0:3.04.00-3.el7 Dependency Installed: giflib.x86_64 0:4.1.6-9.el7 leptonica.x86_64 0:1.72-2.el7 Complete!
Step 3: install more language
[root@tutorialspots ~]# yum install -y tesseract-langpack-rus Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: mirrors.umflint.edu * epel: fedora-epel.mirror.lstn.net * extras: centos.den.host-engine.com * ius: dfw.mirror.rackspace.com * nux-dextop: mirror.li.nux.ro * remi-safe: mirror.bebout.net * updates: centos.den.host-engine.com Resolving Dependencies --> Running transaction check ---> Package tesseract-langpack-rus.noarch 0:3.04.00-3.el7 will be installed --> Finished Dependency Resolution Dependencies Resolved ================================================================================ Package Arch Version Repository Size ================================================================================ Installing: tesseract-langpack-rus noarch 3.04.00-3.el7 epel 7.1 M Transaction Summary ================================================================================ Install 1 Package Total download size: 7.1 M Installed size: 38 M Downloading packages: tesseract-langpack-rus-3.04.00-3.el7.noarch.rpm | 7.1 MB 00:00 Running transaction check Running transaction test Transaction test succeeded Running transaction Installing : tesseract-langpack-rus-3.04.00-3.el7.noarch 1/1 Verifying : tesseract-langpack-rus-3.04.00-3.el7.noarch 1/1 Installed: tesseract-langpack-rus.noarch 0:3.04.00-3.el7 Complete!
You tessdata-dir: /usr/share/tesseract/tessdata
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