Greyn

Easily convert a PNG to greyscale. Just PNGs. Zero configuration.

Add this line to your application's Gemfile:

gem 'greyn'

And then execute:

$ bundle

Or install it yourself as:

$ gem install greyn

greyn path/to/image.png 

This will generate 3 new PNGs in image.png's directory: image_luma.png, image_avg.png, and image_light.png. Each image is generated using a different algorithm.

1. Fork it ( http://github.com/acurry/greyn/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request