Designing a human computer interface using Laser Track Pad (LTP) for the physically challenged people

In this paper, we have proposed a Human Computer Interface, replacing all the basic mouse operations by simple laser beam operations controlled by a Laser Pen (LP) & tracked by the Laser Track Pad (LTP). This approach helps to overcome the limitations of the physically challenged people for interacting with the computer systems. The main emphasis of this work is on mapping the Display Units (DUs) of various resolutions with our fixed-resolution LTP. We have introduced an algorithm to solve the Intermediate Pixel Reachability problem with minimal movement of the laser beam on the LTP (i.e., also with minimal movement of the body part holding the laser pen). The potentiality and possibilities for future works are considered.