Implement text based OCR in openQA
a project by clanig
Updated almost 2 years ago. 8 hacker ♥️. 7 followers.

Project Description

Currently openQA requires a reference image to be stored to do OCR based comparisons. It is not possible to pass a character string to openQA which should be compared to the text in the screenshot. This project is about allowing to just store character strings in the corresponding JSON file of the needle and to get rid of any reference images in case of OCR needles.

Status

Research about possible tools was done. The result was that the current implementation based on Tesseract appears to be too inaccurate on short character strings. The program GOCR seems to do more classical recognition by shape which seems to work reasonably accurate on well shaped characters. The accuracy of the matched strings could be calculated using the library perl-Text-Levenshtein.

Goal for this Hackweek

  • Create draft implementation of OCR in os-autoinst.
  • Optional: Create easy handling of text based OCR needles in openQA web frontend (e.g. providing live preview of recognized text)

Resources

  • This project is tracked here: https://progress.opensuse.org/issues/121354
  • openQA frontend repo: https://github.com/os-autoinst/openQA
  • openQA backend repo: https://github.com/os-autoinst/os-autoinst
  • GOCR: https://wasd.urz.uni-magdeburg.de/jschulen/ocr/
  • Perl-Text-Levenshtein: https://github.com/neilb/Text-Levenshtein

Join this project

Looking for hackers with the skills:

openqa mojolicious perl ocr os-autoinst

This project is part of:

Hack Week 22

Activity

  • almost 2 years ago: okurz liked this project.
  • almost 2 years ago: jzerebecki liked this project.
  • almost 2 years ago: pdostal liked this project.
  • almost 2 years ago: mkoutny liked this project.
  • almost 2 years ago: ggardet_arm left this project.
  • almost 2 years ago: ggardet_arm joined this project.
  • almost 2 years ago: ggardet_arm liked this project.
  • almost 2 years ago: robert.richardson liked this project.
  • almost 2 years ago: dancermak liked this project.
  • almost 2 years ago: ybonatakis liked this project.
  • almost 2 years ago: clanig started this project.
  • almost 2 years ago: clanig added keyword "openqa" to this project.
  • almost 2 years ago: clanig added keyword "mojolicious" to this project.
  • almost 2 years ago: clanig added keyword "perl" to this project.
  • almost 2 years ago: clanig added keyword "ocr" to this project.
  • almost 2 years ago: clanig added keyword "os-autoinst" to this project.
  • almost 2 years ago: clanig originated this project.


    • Comments

    • okurz
      almost 2 years ago by okurz | Reply

      There is very basic support for OCR in os-autoinst with https://github.com/os-autoinst/os-autoinst/blob/master/ocr.pm which might give you some good ideas and a starting base. https://github.com/os-autoinst/os-autoinst/blob/master/t/02-test_ocr.t shows its usage

    • clanig
      almost 2 years ago by clanig | Reply

      Created draft PR: https://github.com/os-autoinst/os-autoinst/pull/2276

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