Introduction JavaCV is a Java wrapper to a number of computer vision libraries including OpenCV, OpenKinect and others. In this article we’ll look at using JavaCV with OpenCV to do real-time face and hand detection on a video stream. Face detection (as opposed to face recognition) has become mainstream with everything from Facebook to low-budget digital cameras supporting it. Hand detection and gesture recognition is somewhat less mature and I was hard pressed to find good open source implementations of this.