Additive light field displays

Lee, Seungjae; Jang, Changwon; Moon, Seokil; Cho, Jaebum; Lee, Byoungho

doi:10.1145/2897824.2925971

Cited by 109 publications

(37 citation statements)

References 41 publications

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“…In holography, the wavefronts are generated by diffraction of coherent light through tiny holes [35]. There has been a large amount of work recently on both computer-generated holograms [41] and compressive light field displays [30]. All the above methods assume that the display substrate consists of 2D pixels.…”

Section: Auto-multiscopic Displaysmentioning

confidence: 99%

Widening Viewing Angles of Automultiscopic Displays Using Refractive Inserts

Lyu

Shen

Komura

et al. 2018

IEEE Trans. Visual. Comput. Graphics

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The viewing position is chosen to be at the boundary of the safe viewing zone of a conventional display (top view). Considerable aberrations are observed (white arrows) in the conventional solution. These errors are not present when refractive inserts are used (rightmost). Our prototype performs spatio-angular multiplexing of a 3840 × 2160 screen to achieve an angular resolution of 36 × 36 and a spatial resolution of approximately 106 × 60 (hence the prominent pixels in the photographs). Please see accompanying video.Abstract-Displays that can portray environments that are perceivable from multiple views are known as multiscopic displays. Some multiscopic displays enable realistic perception of 3D environments without the need for cumbersome mounts or fragile head-tracking algorithms. These automultiscopic displays carefully control the distribution of emitted light over space, direction (angle) and time so that even a static image displayed can encode parallax across viewing directions (lightfield). This allows simultaneous observation by multiple viewers, each perceiving 3D from their own (correct) perspective. Currently, the illusion can only be effectively maintained over a narrow range of viewing angles. In this paper, we propose and analyze a simple solution to widen the range of viewing angles for automultiscopic displays that use parallax barriers. We propose the use of a refractive medium, with a high refractive index, between the display and parallax barriers. The inserted medium warps the exitant lightfield in a way that increases the potential viewing angle. We analyze the consequences of this warp and build a prototype with a 93% increase in the effective viewing angle.

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Section: Auto-multiscopic Displaysmentioning

confidence: 99%

Widening Viewing Angles of Automultiscopic Displays Using Refractive Inserts

Lyu

Shen

Komura

et al. 2018

IEEE Trans. Visual. Comput. Graphics

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“…A light field, which is equivalent to a set of multi-view images captured with both horizontal-and vertical-viewpoint displacements, has many applications such as depth estimation [1], [2], free-viewpoint video [3]- [5], and 3-D display [6]- [8]. Thanks to the introduction of light field cameras (e.g., Lytro Illum) [9]- [13], dense light fields, which have dozens to hundreds of images with very small viewpoint intervals, have recently attracted much research interest [2], [7], [14]- [16].…”

Section: Introductionmentioning

confidence: 99%

Light Field Coding Using Weighted Binary Images

Komatsu

Isechi

Takahashi

et al. 2019

IEICE Trans. Inf. & Syst.

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Member, Kohei ISECHI †b) , Student Member, Keita TAKAHASHI †c) , Member, and Toshiaki FUJII †d) , Fellow SUMMARY We propose an efficient coding scheme for a dense light field, i.e., a set of multi-viewpoint images taken with very small viewpoint intervals. The key idea behind our proposal is that a light field is represented using only weighted binary images, where several binary images and corresponding weight values are chosen so as to optimally approximate the light field. The proposed coding scheme is completely different from those of modern image/video coding standards that involve more complex procedures such as intra/inter-frame prediction and transforms. One advantage of our method is the extreme simplicity of the decoding process, which will lead to a faster and less power-hungry decoder than those of the standard codecs. Another useful aspect of our proposal is that our coding method can be made scalable, where the accuracy of the decoded light field is improved in a progressive manner as we use more encoded information. Thanks to the divide-and-conquer strategy adopted for the scalable coding, we can also substantially reduce the computational complexity of the encoding process. Although our method is still in the early research phase, experimental results demonstrated that it achieves reasonable ratedistortion performances compared with those of the standard video codecs.

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“…Several approaches have been developed to overcome the VAC issue [6][7][8][9][10][11][12][13][14][15][16][17]. Generally, these solutions can be divided into two categories [3]: static (space-multiplexed) and dynamic (time-multiplexed) approaches.…”

mentioning

confidence: 99%

“…Generally, these solutions can be divided into two categories [3]: static (space-multiplexed) and dynamic (time-multiplexed) approaches. The static category typically includes stacked panels [6][7][8], integral displays [9], and scanned fiber arrays [10]. Major challenges of static approaches are the difficulties to stack multiple focal planes in a compact way, and the loss of display resolution and contrast [3].…”

mentioning

confidence: 99%

Polarization-multiplexed multiplane display

et al. 2018

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We demonstrate a polarization-multiplexed multiplane display system for near-eye applications. A polarizationsensitive Pancharatnam-Berry phase lens is implemented to generate two focal depths simultaneously. A spatial polarization modulator is utilized to direct the two images to designated focal planes. Based on this design, a dualfocal-plane display system is constructed without space-or time-multiplexing operations, to suppress the vergenceaccommodation conflict successfully.

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Additive light field displays

Cited by 109 publications

References 41 publications

Widening Viewing Angles of Automultiscopic Displays Using Refractive Inserts

Widening Viewing Angles of Automultiscopic Displays Using Refractive Inserts

Light Field Coding Using Weighted Binary Images

Polarization-multiplexed multiplane display

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