hsiss / rtesseract

Ruby library for working with the Tesseract OCR.

rtesseract¶ ↑

<img src=“https://badge.fury.io/rb/rtesseract.png” alt=“Gem Version” />

Ruby library for working with the Tesseract OCR.

REQUIREMENTS:¶ ↑

To work properly rtesseract are needed:

• Tesseract - Program

• ImageMagic - Program

• RMagick or mini_magick - Gem

Atention: Version 1.0.0 works fine with Ruby 2.0 and tesseract 3.0 and lower versions of rtesseract works fine with Ruby 1.8 and tesseract 2.0.4.

EXAMPLE USAGE¶ ↑

It’s very simple to use rtesseract:

CONVERT IMAGE TO STRING¶ ↑

image = RTesseract.new("my_image.jpg")
image.to_s #Getting the value

CHANGE THE IMAGE¶ ↑

image = RTesseract.new("my_image.jpg")
image.source = "new_image.png"
image.to_s

TRANSFORM THE IMAGE¶ ↑

image = RTesseract.read("my_image.jpg") do |img|
  img = img.white_threshold(245)
  img = img.quantize(256,Magick::GRAYColorspace)
end
image.to_s

CONVERT PARTS OF IMAGE TO STRING¶ ↑

mix_block = RTesseract::Mixed.new("test.jpg") do |image|
  image.area(28,  19, 25, 25)
  image.area(180, 22, 20, 28)
  image.area(218, 22, 24, 28)
  image.area(248, 24, 22, 22)
end
mix_block.to_s

OR

mix_block = RTesseract::Mixed.new("test.jpg",{:areas => [
  {:x => 28,  :y=>19, :width=>25, :height=>25 },
  {:x => 180,  :y=>22, :width=>20, :height=>28},
  {:x => 218,  :y=>22, :width=>24, :height=>28},
  {:x => 248,  :y=>24, :width=>22, :height=>22}
]})
mix_block.to_s

Note on Patches/Pull Requests¶ ↑

• Fork the project.

• Make your feature addition or bug fix.

• Send me a pull request. Bonus points for topic branches.

Links¶ ↑

• Github - github.com/dannnylo/rtesseract

• Rubygems - rubygems.org/gems/rtesseract

Copyright¶ ↑

Copyright © 2013 Danilo Jeremias da Silva. See LICENSE for details.