Ghosting Impingements in 3D Dual-View Projection Systems

Abstract

In this paper, we discuss various technical options to implement 3D dual-view systems, from four frames generated by two triggered or non-triggered 3D projectors. Such a technique offers 3D free-viewpoint capabilities for two viewers. We compare two different technical implementations based on transmissive video projection and reflective silver screen, combining two different 3D encoding techniques: polarization and time multiplexing. The main objective is to analyze and mitigate the ghosting effects, as a function of the technical, modal and frame pairing choices with respect, first to the image optical quality and second to prevent visual fatigue. We suggest some solutions to reduce the impact of the physical ghosting and frame unbalance. These solutions will be expanded in a second paper.

Dual-View Three-Dimensional Display Based on Direct-Projection Integral Imaging with Convex Mirror Arrays

“…Thus, DV displays can be largely classified into spatial and time-multiplexed systems [13][14][15][16][17][18][19]. In the spatial-multiplexed system, the main pixel of the DV LCD (liquid crystal device) panel consists of a right sub-pixel (RSP) and a left sub-pixel (LSP), and those two different sub-pixels project two different images to the viewers at different directions.…”

“…Meanwhile, since the 3-D display can provide a realistic 3-D image with different perspectives to the viewer, some research on the DV 3-D display was recently carried out [19]. In most conventional DV 3-D display systems, time or spatial-multiplexed stereoscopic images are used for providing two different stereoscopic images to the two different viewers.…”

“…However, those systems require four times of spatial and time-multiplexing processes, compared to the 2-D display system. It may result in a one-quarter reduction of the spatial resolution in the spatial-multiplexed system and four-fold acceleration of the LCD response time in the time-multiplexed system, respectively [19]. These practical problems prevent the stereoscopic technique from being widely applied for the DV 3-D display.…”

“…As an alternative, an integral imaging-based DV 3-D display was proposed [20][21][22][23]. Wu and et al suggested a DV 3-D LCD system based on the lens array-based off-axis integral imaging method [19]. However, since the narrow viewing-zone of the ordinary lens array-based integral imaging system was shared by two viewing-zones, sufficient viewing-areas for the DV 3-D display could not be offered.…”

Effect of viewing directions in projection-based multiviewer display systems

“…Here, we are interested in other applications of multi-view display systems where the required viewing angle is much broader. It is the case for collaborative applications, where different users can collaborate on a same platform while each visualizing its own layer of information 1,2 (see figure 1). Likewise, in multi-sided immersive environment, called caves, 3 due to the position of the viewer standing next to large screens, some viewing directions are much more challenging in terms of visual quality.…”