Horizontal Motion Parallax Research Articles

A spatio-temporal multiplexing multi-view display using a lenticular lens and a beam steering screen

A new type of spatio-temporal multiplexing multi-view three-dimensional (3D) display with horizontal motion parallax has been developed. The proposed 3D display system comprises: a fast liquid-crystal-display (LCD), a lenticular lens and a beam steering screen. The lenticular lens is customized for the LCD screen so as to project the display image into different directions. The beam steering screen is fabricated by using two layers of twisted-nematic (TN) LC cells with micro-prism-array(MPA) substrates, and multiple polarization statues can be produced by regulating the biasing voltages on the steering screen. Image light beam from the LCD screen is firstly split by the lenticular lens, and then further deflected to desired directions by the steering screen. Thus, the proposed method implements temporal multiplexing onto common spatial multiplexing multi-view displays, and dense viewing zones are created horizontally in space. A complete prototype based on this technology has been developed, and the proof of concept has been verified by experimental results.

Real-mode depth-fused display with viewer tracking.

A real-mode depth-fused display is proposed by employing an integral imaging method in the depth-fused display system with viewer tracking. By giving depth-fusing effect between a transparent display and a floated planar two-dimensional image generated by the real-mode integral imaging method, a three-dimensional image is generated in front of the display plane unlike conventional depth-fused displays. The viewing angle of the system is expanded with a viewer tracking method. In addition, dynamic vertical and horizontal motion parallax can be given according to the tracked position of the viewer. As the depth-fusing effect is not dependent on the viewing distance, accommodation cue and motion parallax are provided for a wide range of viewing position. We demonstrate the feasibility of our proposed method by experimental system.

P‐6: A Novel 3D Display Based on Spliced Images

AbstractA novel 3D display approach and system based on spliced images is proposed, which consists of an array of mini‐projectors and a vertical diffuser. We made a prototype‐equipment using 49 mini‐ projectors and a vertical diffuser to demonstrate this method. A 23‐inch LCD screen with the resolution of 1920*1080 and 49 Fresnel lens were used to make the mini‐projector array. This device can display a 3D image with 49 horizontal viewpoints and a small angle pitch of 0.51 °. The 3D images displayed by our approach can be observed at different horizontal and vertical viewpoints without fatigue. The observers will get depth perception from binocular parallax, horizontal motion parallax and vertical motion parallax.

Three‐dimensional display utilizing a diffractive optical element and an active matrix liquid crystal display

We describe the design, construction, and performance of the first real-time autostereoscopic three-dimensional (3-D) display based on the partial pixel 3-D display architecture. The primary optical components of the 3-D display are an active-matrix liquid crystal display and a diffractive optical element (DOE). The display operates at video frame rates and is driven with a conventional VGA signal. Three-dimensional animations with horizontal motion parallax are readily viewable as sets of stereo images. Formation of the virtual viewing slits by diffraction from the partial pixel apertures is experimentally verified. The measured contrast and perceived brightness of the display are excellent, but there are minor flaws in image quality due to secondary images. The source of these images and how they may be eliminated is discussed. The effects of manufacturing-related systematic errors in the DOE are also analyzed.

Real-time three-dimensional display based on the partial pixel architecture

We previously reported several static three-dimensional (3-D) display implementations of the partial pixel architecture [J. Opt. Soc. Am. A 12, 73 (1995)]. We report herein our f irst real-time 3-D display based on this architecture. The display is functionally equivalent to a real-time holographic stereogram. It is autostereoscopic and provides horizontal motion parallax. The display device is composed of a diffractive optical element (fabricated with standard photolithographic techniques) and a separate conventional liquidcrystal display. The display has been used to play back a precomputed animated 3-D scene at video frame rates using a standard VGA video output.

Interhemispheric depth judgement

Interhemispheric depth comparisons were studied by requiring subjects to align in depth two textured plates, one presented to the left hemifield and the other to the right. Callosal agenesis subjects and neurologically-normal control subjects adjusted the plates so that they appeared to be at the same distance. Subjects viewed the plates monocularly or binocularly while keeping their head still, moving it side-to-side or moving it up and down. Subjects fixated a target located between the two plates while performing the task. For all subjects, the results showed that the deviations from veridical settings were significantly smaller for the binocular than for the monocular viewing conditions. Moreover, there were no significant differences among the three binocular viewing conditions (horizontal, vertical or no head movement), indicating that neither vertical nor horizontal motion parallax improves the precision of depth judgement when binocular disparity is available. These results further suggest that the precision of interhemispheric comparison for binocular depth is not affected by the absence of the corpus callosum. Looking at the plates monocularly, the control subjects judge the relative depth between the plates more precisely when they moved their head than when they kept it still. These results show that motion parallax is a useful depth cue when relative motion is extracted from different hemifields. Unlike the control subjects, the callsal agenesis subjects did not judge the relative depth between the plates more precisely when they moved their head when they kept it still. These results show that interhemispheric comparison of depth using relative motion is not possible without the corpus callosum.