The principle construction of the unique autostereoscopic 3D LCD wall is considered. This glasses-free 3D LCD wall provides presentation of high-quality stereo images for many users simultaneously. The technical characteristics of the 3D LCD wall are compared with the corresponding parameters of the multiview 3D projection wall. The general equation for the evaluation of the multiview stereo image in this 3D LCD wall will be presented and all of its parameters are analysed. We introduce here the fundamental matrices, in which will be contained the information about the contribution of the different views in every subpixel. The properties of these matrices as well as their use for the evaluation of the stereo-image are considered. The problem of the adjustment of the stereoscopic image on the 3D LCD wall is also discussed and different types of adjustment are considered. For some of them the corresponding equations are given. The presented approach may be applied also to the case of the multiview autostereoscopic 3D plasma wall.
During of some last years our company investigates and produces 3D autostereoscopic displays of the different sizes. The multi-view 3D display from our company consists of the ordinary flat TFT LCD or plasma display in front of which the special optical filter is situated. In this paper we describe our last achievements for the creation of the large 3D systems, consisting of a set of identical display panels. In particular, we consider here a construction of the autostereoscopic back projection system. In this case a situation is more complicated, because colour value of every R G, and B subpixel is projected on the same place that leads to the decrease of the 3D resolution and quality of the observed stereo-image. The other problem is the adjustment of the 3D large system, so the special approaches are discussed.
The corresponding equations for the calculation of the stereo-image for the projection wall will be presented. We demonstrate also that for the same structure of the optical filter the different number of views may be used. Based on the presented principles and approaches our company creates the first in the world 3D large projection system. The future directions of development of the 3D large display are also discussed.
For the presentation of the stereo-image, the 3D-display of X3D Technologies uses the special optical filter structure. One of the problems appearing here is the adjustment of the optical filter with respect to the surface of the pixel structure. In many practical cases the width of the display's subpixel is not known exactly or in the process of the creation of the optical filter the attempts to realize the required sizes with a necessary accuracy failed. For the solution of these problems we suggest using the scaling, translation or rotation of the stereo-image to adjust the size of the elements of the structure of the optical filter with the pixel structure of the 3D-display. We demonstrate here also that the scaling of the stereo-images has some special features in contrast to the scaling of ordinary 2D-images. The approach may be applied also to displays with a different pixel form or with individually different widths of the RGB subpixels. The numerical algorithms based on the approach considered here have been successfully tested on our 3D-displays. These approaches may also be used for 3D-displays based on lenticular lenses.
Our company 4D-Vision develops technology based on the wave length selective filter array which allows to observe the stereo-images and animations in TFT or plasma displays of any size, from 3.9 to 50 inches and even more and at relatively low cost. The other advantage of our original technology is that the stereo-images may be viewed on our 3D displays by many users simultaneously and without having to use any additional viewing aids. In this paper we present in matrix form the different types of the stereo-image encoding which may be realized in our 3D display. In particular, we show that the colour stereo-image on our 3D display may be obtained also from the set of the 2D gray scaled images. We present also the results of the investigation of stability of the stereo-image with respect to the definite perturbations dependent on an angle between neighbour perspectives. The general relations, allowing to evaluate the distribution of the 2D images in one stereo-image are also presented. Some of them were already realized in our 3D display. At this time 4D-Vision manufactures 3D-displays using up to 40 channels for the stereo-image representation. We show, that the presented results may be also used in stereo projection devices, based on 4D-Vision technology.