A java based programming environment - processing - free from processing.org. here it uses a free library - OpenCV - to detect blobs in a live video capture - some parts like - hands or head or the entire human are evidenced through some visual eff

creates random blobs, little diamonds. every time you refresh or resize the applet box they randomize again

Callback class for receiving events from MountService about Opaque Binary Blobs (OBBs).