From a Google Blog Post:
Our new tools will help you discover works and artifacts, allowing you to immerse yourself in cultural experiences across art, history and wonders of the world—from more than a thousand museums across 70 countries:
• Scroll through art by time—see how Van Gogh’s works went from gloomy to vivid
• Browse by color and learn about Monet’s 50 shades of gray
• Find a new fascinating story to discover every day—today, it’s nine powerful men in heels
But Wait, Here’s More…The Art Recognizer***
The Art Recognizer is now available in London’s Dulwich Picture Gallery, Sydney’s Art Gallery of New South Wales and the National Gallery of Art in Washington DC. Just pull up the app, point your phone’s camera to a painting on display and find all the information you want to know about the artwork. We’re planning to roll this out to museums around the world—so stay tuned.
Direct to New Google Arts & Culture Web Site
Read the Complete Blog Post
PhotoMath is another example of an app (Free; iOS and Android) that recognizes an image and returns data. In this case, simply point your camera at a math/algebra problem and in a second (or less) you’ll see the answer (you’ll even see each stepp used to solve).
Here’s another: CamFind (Free; iOS and Android)