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