A concept of Line Spread Function (LSF) in depth and Optical Transfer Function (OTF) in depth of human vision system were intoroduced. In order to measure the LSF in depth, two kinds of experiment were carried out. A use of moving bar-target depth perception system was made to measure composite characteristics of human vision system. A field sequential stereoscopic television system was used to measure LSF in depth originating from binocular parallax of eyes. Obtained LSF in depth can be approximated by Gaussian curves having similar parameters. OTF in depth were derived by Fourier Transforms of LSF in depth.
This paper describes a new stereoscopic display system with extended observable space employing an eye-position tracking technique. In this display system, as a video projector is mechanically driven according to the viewer's eye position, the left- and right-eye images continuously enter the viewer's eye. Thus the viewer can move and continue to observe the stereoscopic image, and it is possible to extend the stereoscopic area widely. Experimental equipment consists of an LCD video projector, a lenticular screen, a motor-driver for the projector, a video signal multiplexer and an eye-position tracker. Experimental results show that the stereoscopic area moved according to the movement of the projector.
The picture quality of stereoscopic Hi-Vision images band-limited in two-dimensional (horizontal and vertical) domain is evaluated. Throughout the tests, it becomes clear that the band-limitation in diagonal direction is much more effective for three-dimensional images than for two-dimensional ones.
Since the demonstration of projection-type autostereoscopic lenticular 3D display using an array of projection lenses in front of a photographic film of view pictures with parailax, the feasiblity of the same type 3D TV display has been anticipated if view pictures are reproduced on an array of LCD panels. This paper describes an experimental verification of the feasibility. The experimental dispaly consists of three parts : a set of 12 projection lenses in front of 12 LCD panels illuminated by 12 lamps, a transformation optic consisting of an off-centered Fresnel lens and a convex mirror, and a lenticular screen for displaying 3D image to observers. The transformation optic reduces the separation of projenction lenses to obtain the condition of easy viewing by human observers. A dynamic 3D image is seen on a lenticular screen with 460mmH×360mmV size by observers without glasses. The reference viewing zone has 420m width 1100mm in front of the lenticular screen. Observesr can see 3D image from any position in a deep viewing zone.