A Multi-touch System Using Four Cameras

To tackle the occlusion problem of multiple touches in multi-touch systems,a multi-touch system with four collaborative cameras is proposed,which includes four different layers,a hardware layer,an image processing layer,an image interpretation layer and an application layer.The hardware layer is a low-cost and scalable platform composed of four cameras,a rectangle frame and many infrared light-emitting diodes stationed along the frame.The image processing layer captures images and detects touches.The image interpretation layer locates and tracks touches.The application layer interacts with specific applications by gestures.An example application of picture management,which involves complex manipulations,shows that our multi-touch system is able to be used in a variety of applications such as information query,command and control,etc.