The Betaface SDK, with Face Detection and Recognition, is a Windows DLL library that applies complex algorithms designed to detect a set of pre-programmed facial characteristics within images as well as videos. These features include general face info such as position, size, angle, 8 standard facial landmarks, gender, age ethnicity, and more. Extended measurements can include more detailed specific information like facial hair, glasses, hairstyle, skin color, clothes, background color, and more. The SDK can be accessed from multiple environments, as long as a call is made to DLL, COM object, or .Net.
For detailed information see http://betaface.com/wpa/wp-content/uploads/2014/01/Betaface-SDK.pdf
Animetrics, a leading developer of 2D to 3D face recognition and face creation solutions, provides the Animetrics Face Recognition that can be used to detect human faces in pictures and match them against a set of known or documented faces. This tool is specifically useful for applications for the fashion and online entertainment industries, or for law enforcement or military intelligence where accurate identity resolution is a necessity.