Ruby library for working with the Tesseract OCR.
Check if tesseract ocr programs are installed:
$ tesseract --version
If not, you can install them with a command like:
$ apt install tesseract-ocr
or
$ brew install tesseract
or for Heroku 22 to add the buildpack https://github.com/pathwaysmedical/heroku-buildpack-tesseract
Add this line to your application's Gemfile:
gem 'rtesseract'And then execute:
$ bundle
Or install it yourself as:
$ gem install rtesseract
It's very simple to use rtesseract.
image = RTesseract.new("my_image.jpg")
image.to_s # Getting the value image = RTesseract.new("my_image.jpg")
image.to_pdf # Getting open file of pdf image = RTesseract.new("my_image.jpg")
image.to_tsv # Getting open file of tsvThis will preserve the image colors, pictures and structure in the generated pdf.
RTesseract.new('test.jpg', lang: 'deu')- eng - English
- deu - German
- deu-f - German fraktur
- fra - French
- ita - Italian
- nld - Dutch
- por - Portuguese
- spa - Spanish
- vie - Vietnamese
- or any other supported by tesseract.
Note: Make sure you have installed the language to tesseract
RTesseract.new('test.jpg', config_file: :digits) # Only digit recognitionOR
RTesseract.new('test.jpg', config_file: 'digits quiet') RTesseract.new('test_words.png').to_box
=> [
{ :word => 'If', :confidence=>89, :x_start=>52, :y_start=>13, :x_end=>63, :y_end=>27},
{ :word => 'you', :confidence=>96, :x_start=>69, :y_start=>17, :x_end=>100, :y_end=>31},
{ :word => 'are', :confidence=>92, :x_start=>108, :y_start=>17, :x_end=>136, :y_end=>27},
{ :word => 'a', :confidence=>92, :x_start=>133, :y_start=>8, :x_end=>147, :y_end=>35},
{ :word => 'friend,', :confidence=>95, :x_start=>158, :y_start=>13, :x_end=>214, :y_end=>29},
{ :word => 'you', :confidence=>96, :x_start=>51, :y_start=>39, :x_end=>82, :y_end=>53},
{ :word => 'speak', :confidence=>96, :x_start=>90, :y_start=>35, :x_end=>140, :y_end=>53},
{ :word => 'the', :confidence=>96, :x_start=>146, :y_start=>35, :x_end=>174, :y_end=>49},
{ :word => 'password,', :confidence=>96, :x_start=>182, :y_start=>35, :x_end=>267, :y_end=>53},
{ :word => 'and', :confidence=>96, :x_start=>51, :y_start=>57, :x_end=>81, :y_end=>71},
{ :word => 'the', :confidence=>96, :x_start=>89, :y_start=>57, :x_end=>117, :y_end=>71},
{ :word => 'doors', :confidence=>96, :x_start=>124, :y_start=>57, :x_end=>172, :y_end=>71},
{ :word => 'will', :confidence=>96, :x_start=>180, :y_start=>57, :x_end=>208, :y_end=>71},
{ :word => 'open.', :confidence=>96, :x_start=>216, :y_start=>61, :x_end=>263, :y_end=>75}
]After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.
To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.
Bug reports and pull requests are welcome on GitHub at https://github.com/dannnylo/rtesseract. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.
The gem is available as open source under the terms of the MIT License.
Everyone interacting in the Rtesseract project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.