Provided by: Creative Commons
Date Added: Jul 2014
In this paper, the authors present more efficient algorithm used to detect the finger stroke of a projected keyboard layout on any flat non-reflecting surface. The virtual keyboard consist of variable intensity projector for projecting keyboard layout, a camera with infra-red filter for capturing only infra-red wavelength light reflected objects, an infra-red diode for object detection, photo-diode with simplified circuitry to on-off the key stroke detection and key board layout projection. The camera used is connected to PC or laptop with a wireless connection operating at 2.4GHz frequency of IEEE standard.