Face Detection in iOS Using Core Image

Core Image is a powerful API built into Cocoa Touch. However, it often gets overlooked. In this tutorial, we're going to examine Core Image's face detection features and how to make use of this technology in your own iOS apps! Face detection in iOS has been around since the days of iOS 5 (circa 2011) but it is often overlooked. The facial detection API allows developers to not only detect faces, but also check those faces for particular properties such as if a smile is present or if the person is blinking. First, we're going to explore Core Image's face detection technology by creating a simple app that recognizes a face in a photo and highlights it with a box.