Improving visual quality of view transitions in automultiscopic displays

Abstract

Automultiscopic screens present different images depending on the viewing direction. This enables glasses-free 3D and provides motion parallax effect. However, due to the limited angular resolution of such displays, they suffer from hot-spotting, i. e., image quality is highly affected by the viewing position. In this paper, we analyze light fields produced by lenticular and parallax-barrier displays, and show that, unlike in real world, the light fields produced by such screens have a repetitive structure. This induces visual artifacts in the form of view discontinuities, depth reversals, and excessive disparities when viewing position is not optimal. Although the problem has been always considered as inherent to the technology, we demonstrate that light fields reproduced on automultiscopic displays have enough degrees of freedom to improve the visual quality. We propose a new technique that modifies light fields using global and local shears followed by stitching to improve their continuity when displayed on a screen. We show that this enhances visual quality significantly, which is demonstrated in a series of user experiments with an automultiscopic display as well as lenticular prints.

3D Video Rendering Adaptation: A Survey

“…Since the retargeting is similar to the process of re-imaging, the pixel re-organization with different constraints, especially the accurate disparity constraint is very challengeable. The computer graphics technologies are mostly processing the computer-generated image or video and some of them can be consequently borrowed to optimize the retargeting quality, such as warping, inpainting and light field processing [44,45]. For virtual view interpolation, the depth map or disparity map is generally utilized to generate the high quality virtual view.…”

Widening Viewing Angles of Automultiscopic Displays Using Refractive Inserts

“…3b). The transition across views can be optimized using sheared filtering [8]. Unlike autostereoscopic displays [16], which provide the same stereo illusion from multiple view locations (see fig.…”

3-D perception enhancement in autostereoscopic TV by depth cue for 3-D model interaction

“…In other words, the spatial resolution has been dragged down due to this technique. Secondly, since the limited angular resolution of such display, viewers might find some vertical distortion caused by view transition at specific angles [1]. This might make people feel uncomfortable to stand in these regions.…”

“…Many other solutions have been proposed to improve autostereoscopic TV displays [1,3]. However, most of these solutions need to modify the autostereoscopic 3-D TV hardware, or add extra image processing algorithm, which might increase the cost and thus make it difficult to become a commercial product.…”