Detecting and cropping a face from an picture?

I am working on开发者_开发技巧 a Face Recognition system for my internship. I am developing the project in Java right now. I am using OpenCV library, but it does not seem to work correctly in detecting faces.

I am at a point, where I capture image from the desktop and store it on the hard drive.

All I want now is to detect a face in that image (NOT IDENTIFY). I just need to detect that face and crop it.

Please help me with it. If anyone has specific code in Java to detect faces in a images, please send me that too.72236

This library already has face detection built in. You'd probably be better off using it.