The Label Detection Node.js Sample Code by Google Cloud Vision presents how to integrate image recognition features into applications. It includes code to import library, use API to detect labels, requests and responses.
The sharing of thousands of online images is a big part of daily social media interaction. Even with the accompanying comments enhanced by expressive punctuation or clever emoticons, however, nothing beats an actual spoken response for an accurate representation of how a person has really responded to an image or what they really think about that image. SayRoom makes this possible by allowing users to actually voice and share their recorded reactions. The service also provides the SayRoom API that allows developers to access these audio messages created by users.
Kooaba offers image recognition through its Kooaba API, allowing you to compile metadata on objects in your photos. This can be used for product recognition and pricing, but could also be used to augment personal photo collections, which can be so large that they are nearly impossible to search by hand. There are tons of use cases for image recognition and this API should really open up the field and bring more applications to market.