The FaceX PHP Sample Code demonstrates how to access the API to get image attributes, compare faces, and match faces. It is recommendable to use cURL for testing, although developers can access with PHP and additional languages.
Bryan Parker founded ImageFly out of necessity: "To be honest, I was fed up with having to bounce around between image libraries when I was hammering out a project. It seems like it was GD one day, RMagick the next, and something else the next." ImageFly exists to simplify image modification. The ImageFly API grants developers many image editing tools within web properties and applications.
The Rekognition API differentiates its feature set by processing images to recognize more than just the location of faces. Rekognition's technology will analyze a given photo and present a list of scenes, each with a probability rating. Faces are not simply identified, but are also classified for age and emotion.