This Swift SDK interfaces with PredictionIO's machine learning server. PredictionIO's prediction engine API is built on the following open source stack: Apache Spark, HBase and Spray and uses DASE - the "MVC" for machine learning. Note that the SDK requires iOS 7.0 or later, OS X 10.9 or later, and Xcode 6.1
Google Cloud Vision API gives developers access to powerful image processing and analysis tools for use in any project. This tutorial on Google Cloud Platform shows followers how to use the API to detect faces in an image, and use the returned coordinates to draw a polygon around each face.