Abstract
This paper reports on the design and evaluation of direct 3D gesture interaction with a full horizontal parallax light field display. A light field display defines a visual scene using directional light beams emitted from multiple light sources as if they are emitted from scene points. Each scene point is rendered individually resulting in more realistic and accurate 3D visualization compared to other 3D displaying technologies. We propose an interaction setup combining the visualization of objects within the Field Of View (FOV) of a light field display and their selection through freehand gesture tracked by the Leap Motion Controller. The accuracy and usefulness of the proposed interaction setup was also evaluated in a user study with test subjects. The results of the study revealed high user preference for free hand interaction with light field display as well as relatively low cognitive demand of this technique. Further, our results also revealed some limitations and adjustments of the proposed setup to be addressed in future work.
Highlights
Light field display is a major breakthrough among glasses free 3D displaying technologies and provides very natural representation of 3D scenes
The underlying principle of displaying 3D content is explained by legacy Stereoscopic 3D (S3D) technology. 3D illusion in S3D is created by providing two slightly offset views of a scene captured by two cameras simultaneously and synchronized to left and right eyes of the viewer
To the best of our knowledge, we report on the first study involving direct interaction with virtual objects on a light field display using Leap Motion Controller
Summary
Light field display is a major breakthrough among glasses free 3D displaying technologies and provides very natural representation of 3D scenes. View isolation is achieved by using special eye-wear. In a glasses free system, the process of view isolation has to be part of display hardware and such displays are, generally called autostereoscopic displays. To achieve the separation of views, the intensity and color of emitted light from every single pixel on the display should be a function of direction. The transmission of light is directed by employing parallax barriers and lenticular lenses. The effective 3D Field Of View (FOV) and angular resolution are functions of number of barriers. Due to the practical limitations of the hardware the final FOV of multiview autostereoscopic displays is rather limited
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