Converting Every Surface to Touchscreen

Today, touchscreens are one of the easiest means of communication for computers, electronic devices, mobile phones, industrial and official machineries. Due to the limitation in production technology and high production cost of these screens, they are not that much available to use in a vast range, this paper tend to explain the possibility of converting any flat surfaces, such as monitor screens of PCs, notebooks, televisions or video projection screens, to a touchscreen by using image processing techniques. We can mention: the facility of transforming every flat surface to touchscreen without any limitation in its dimensions, putting the camera and video projector in the same side of user, the possibility of placing the camera anywhere toward the screen, easy scale up and down for different screen sizes, easy setup and calibration, supporting multi touch, and real time response, as the advantages of the proposed algorithm.