I'm creating an application in which the user will use their face to move the mouse. I have used Emgucv (wrapper for opencv) to create an application in C# which detects the face of a person and locates the center-point on their face.
I'm using the setcursorpos function to move the cursor. What I'm doing is I'm passing the center coordinates of the face detection to setcursorpos, so the mouse movement is very limited.
How do I move the mouse anywhere on the screen smoothly by the slightest face movement?
I wrote a c# tutorial on youtube where (source code included) where I show how to detect head movement direction.
Basically it makes use of opencv goodfeaturestotrack and then use optical flow to compute the overall motion from a set of points.