1. A method for calibrating a coordinate detection system, the method comprising: capturing an image above a touch surface positioned on a body, the image captured by at least one camera positioned outside an area defined by the touch surface; and identifying, by a processor, a plane corresponding to the touch surface based on at least three points defining the plane, wherein identifying the plane comprises identifying at least one point of the plane by determining a touch point based on tracking an image of an object and a mirror image of the object as reflected by the touch surface.