Because a three-dimensional (3-D) autostereoscopic image can be seen from a desired viewpoint without the aid of special viewing glasses, integral photography (IP) is an ideal way to create 3-D autostereoscopic images. We have already proposed a real-time IP method that offers 3-D autostereoscopic images of moving objects in real time by use of a microlens array and a high-definition television camera. But there are two problems yet to be resolved: One is pseudoscopic images that show a reversed depth representation. The other is interference between the element images that constitute a 3-D autostereoscopic image. We describe a new gradient-index lense-array method based on real-time IP to overcome these two problems. Experimental results indicating the advantages of this method are shown. These results suggest the possibility of using a gradient-index lens array for real-time IP.
© 1998 Optical Society of America
(110.2350) Imaging systems : Fiber optics imaging
(110.2760) Imaging systems : Gradient-index lenses
(110.6880) Imaging systems : Three-dimensional image acquisition
(160.3130) Materials : Integrated optics materials
Jun Arai, Fumio Okano, Haruo Hoshino, and Ichiro Yuyama, "Gradient-index lens-array method based on real-time integral photography for three-dimensional images," Appl. Opt. 37, 2034-2045 (1998)