ruby-opencv
An OpenCV wrapper for Ruby.
- Web site: https://github.com/ruby-opencv/ruby-opencv
- Ruby 2.x and OpenCV 2.4.13 are supported.
- Documentation
Requirement
Install
Linux/Mac
- Install OpenCV
- Install ruby-opencv
$ gem install ruby-opencv -- --with-opencv-dir=/path/to/opencvdir
Note: /path/to/opencvdir is the directory where you installed OpenCV.
Windows (RubyInstaller)
See install-ruby-opencv-with-rubyinstaller-on-windows.md.
Sample code
Load and Display an Image
A sample to load and display an image. An equivalent code of this tutorial.
require 'opencv'
include OpenCV
if ARGV.size == 0
puts "Usage: ruby #{__FILE__} ImageToLoadAndDisplay"
exit
end
image = nil
begin
image = CvMat.load(ARGV[0], CV_LOAD_IMAGE_COLOR) # Read the file.
rescue
puts 'Could not open or find the image.'
exit
end
window = GUI::Window.new('Display window') # Create a window for display.
window.show(image) # Show our image inside it.
GUI::wait_key # Wait for a keystroke in the window.Face Detection
A sample to detect faces from an image.
require 'opencv'
include OpenCV
if ARGV.length < 2
puts "Usage: ruby #{__FILE__} source dest"
exit
end
data = './data/haarcascades/haarcascade_frontalface_alt.xml'
detector = CvHaarClassifierCascade::load(data)
image = CvMat.load(ARGV[0])
detector.detect_objects(image).each do |region|
color = CvColor::Blue
image.rectangle! region.top_left, region.bottom_right, :color => color
end
image.save_image(ARGV[1])
window = GUI::Window.new('Face detection')
window.show(image)
GUI::wait_keyFor more samples, see examples/*.rb
LICENSE:
The BSD Liscense
see LICENSE.txt