Simple Coordinate Transformation Method for 3D Interaction Systems

The aim of the present study is to realize a virtual 3D pen. The 3D location is recognized by a stereo camera, allowing objects to be displayed in real time at their actual location. It is assumed that the two coordinates (one for the camera, the other for the display) can be transformed by an affine transformation. The conversion formula for this transform is constructed from the four points of the location pairs. Experimental results confirm that the virtual location shown on the display is almost the same as the real location of the light.