The initial Open Computer Vision library was originally developed by Intel Corporation. Recent development has been headed by Willow Garage, Inc.

OpenCV Sourceforge Project opencv.willowgarage.com/wiki/

Sourceforge sourceforge.net/projects/opencvlibrary/

Ruby/OpenCV Author’s Web Page blueruby.mydns.jp/opencv

OpenCV Ruby Wrapper

• First release rubygems, Some OpenCV functions wrapped.

• Ruby 1.8.7, 1.9.2 and OpenCV 2.2 are supported.

• Mouse interaction often causes segfaults on my Ubuntu 10.10 (Ruby 1.9.2).

This library relies on the OpenCV project. The following page shows how to install it:

opencv.willowgarage.com/wiki/InstallGuide

You can install by cloning this repository:

git clone git://github.com/ser1zw/ruby-opencv.git

Then inside the ruby-opencv folder run:

rake install_gem

You can also add ruby-opencv in your Gemfile:

echo -e "\n"'gem "opencv", :git => "https://github.com/pcting/ruby-opencv"' >> Gemfile
bundle install # or bundle update

Once installed it is possible to show images via GUI Window.

require "opencv"

image = OpenCV::IplImage.load("sample.jpg")
window = OpenCV::GUI::Window.new("preview")
window.show(image)
OpenCV::GUI::wait_key

For more samples, see examples/*.rb

Here is a sample face detection program that doesn’t rely on the GUI components. In order for this to work you must copy the OpenCV haarcascades data into a subfolder called data.

#!/usr/bin/env ruby
require "opencv"

if ARGV.length < 2
  puts "Usage: your_app_name source dest"
  exit
end

data = "./data/haarcascades/haarcascade_frontalface_alt.xml"
detector = OpenCV::CvHaarClassifierCascade::load(data)
image = OpenCV::IplImage.load(ARGV[0])
detector.detect_objects(image) do |region|
  color = OpenCV::CvColor::Blue
  image.rectangle! region.top_left, region.bottom_right, :color => color
end
image.save_image(ARGV[1])

• OpenCV 2.2 or later opencv.willowgarage.com/wiki/

• ffcall (optional) www.haible.de/bruno/packages-ffcall.html

The BSD Liscense

see LICENSE.txt