OpenCV is a library of computer vision developed by Intel, we can easily detect faces using this library for example. I’d note how to use it with iOS SDK, including the building scripts and a demo application. Here I attached screen shots from the demo applications. Support Latest OpenCV and iOS SDK Updated the project, support OpenCV 2.2.0, iOS SDK 4.3, Xcode 4 (Updated 04/17/2011.) Getting Start