The authors propose an electronic 3D display combining a multiview display and a volumetric display.
Conventional multiview displays often give the viewers severe eyestrains because of the contradiction
between binocular convergence and focal accommodation of the eyes. Though volumetric displays are
free from the contradiction, they cannot express occlusion or gloss of the objects. The proposed system
overcomes these disadvantages at once by displaying colors by the multiview display part and fine
contrast of edges by the volumetric display part. As for the multiview display we use conventional
multiview technologies. As for the volumetric, we use multilayer monochrome TFT liquid crystal panels.
Here we can use monochrome panels because the volumetric part is just in charge of expressing edge
contrast. This can sufficiently lead proper accommodation since focal accommodation of our eyes is
dependent only on the edge of the image. To connect the edges of adjacent panels smoothly, we apply
DFD approach, where the point in the middle of two panels is expressed by depiction on both panels.
The authors propose an inexpensive human interface for teleoperation of mobile robots by giving a perspective-transformed image of a virtual 3D screen on a standard PC display. Conventional teleoperation systems of mobile robots have used multiple screens for multiple cameras or a curved screen for a wide view camera, both of which are expensive solutions intended only for professional use. We adopt a single standard PC display as the display system for the operator to make the system affordable to all PC users. To make the angular location perceivable with a 2D display, the authors propose a method to show on the flat screen a perspective-transformed image of a virtual 180-degree cylindrical screen. In this system the image shown on the 2D screen preserves angular information of the remote place, which can help the operator grasp the angular location of the objects in the image. The result of the experiments indicates that the perspective-transformed images of the cylindrical screen can give the operator a better understanding of the remote world, which enables easier and more instinctive teleoperation.