Human factor research of user interface for 3D display

The user interface for the observer to interact with 3D image has been discussed. The appropriate touching range and suitable size of the 3D image are relative to depth (disparity) of the 3D image. According to experimental results, when disparity of the 3D image is large, size of the 3D image is necessary to be larger to let the observer precisely judge that finger tip is touching the 3D image or not.