Looking for image processing library for pure Ruby [closed]

Question

Most of the libraries/ codes I find are for RoR and not pure ruby. Even if I google pure ruby image upload, I get Pure Ruby On Rails ;)

So...I am looking for a gem/ library/ code that will do simply couple things:

• check if it's a valid image file
• resize image to the predefined values
• save it as jpg (from jpeg, jpg, png, gif, bmp)

Answer 1

Check out mini magick or rmagick:

There are others.

Note you can use a gem outside of Ruby on Rails. In your command line do:

$ gem install gem_name

And in your ruby file, require it

require 'gem_name'

Answer 2

checkout https://github.com/jcupitt/ruby-vips a fast an awesome image processing library