Camera-based touch system

In-camera based on touch system (50), including: The passive touch surface (60) and at least two camera (63), which are the touch surface and position. At least two camera (63) is provided with touch surface field of overlapped vision area (FOV). At least two camera is connected to the touch image surface of the different position obtaining, and image data. The processor (54) and punishes at the same time the edge of the image data at least two camera with, wherein so at least two camera to obtain the image for catching with the display, the display is opposite to the touch surface position. A determining for displaying and a surface contacting and display hung on touch surface.