rflickr is a Ruby implementation of the Flickr API. It includes a faithful reproduction of the published API as well as method encapsulation to provide more useful object mappings. rflickr features result caching to improve performance.
Recognize.im recently announced that its image recognition API service has publicly launched. Until now, the Recognize.im API remained accessible on an invite only basis. Recognize.im hopes to tap into the quickly growing image recognition market and target mobile shopping apps and advertising campaigns. The platform recognizes real-world objects and redirects customers to take action after the customer takes a photo of the object with a smartphone.