We help the deaf and the dumb to communicate with normal people using hand gesture to speech conversion. In this code we use depth maps from the kinect camera and techniques like convex hull + contour ...

to draw the boundary line between True and False regions on a boolean 2d array. Without levels=[.5], one gets the default 8 levels which go at 0, 0.15, 0.3, 0.45, 0.6, 0.75, 0.9, 1.05 resulting in all ...