A Fast Computer-Generated Holographic Method for VR and AR Near-Eye 3D Display

Xin, 杨鑫 Yang; Zhang, Hongbo; Wang, Qiong‐Hua

doi:10.3390/app9194164

“…In another scenario, the CGH can project images to different viewers [18,21], who can decide whether to wear a glass or not as they wish. The technology may also be integrated into available near-eye display devices [22,23].…”

Section: Concept Of the Holographic Multiplexing Methodsmentioning

confidence: 99%

Domain multiplexed computer-generated holography by embedded wavevector filtering algorithm

Wu

¹

,

Zhang

²

2021

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Computer-generated holography can obtain the wavefront required for constructing arbitrary intensity distributions in space. Currently, speckle noises in holography remain an issue for most computational methods. In addition, there lacks a multiplexing technology by which images from a single hologram and light source can be switched by a lens. In this work, we first come up with a new algorithm to generate holograms to project smoother images by wavevector filtering. Thereupon, we propose a unique multiplexing scheme enabled by a Fourier lens, as the incident light can be decomposed either by a superposition of spherical waves or plane waves. Different images are obtained experimentally in the spatial and wavevector domains, switchable by a lens. The embedded wavevector filtering algorithm provides a new prospective for speckle suppression without the need for postprocessing. The multiplexing technology can double the capacity of current holographic systems and exhibits potential for various interesting display applications.

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“…In another scenario, the CGH can project images to different viewers [19,22], who can decide whether to wear a glass or not as they wish. The technology may also be integrated into available near-eye display devices [23,24]. Figure 2a.…”

Section: Concept Of the Holographic Multiplexing Methodsmentioning

confidence: 99%

Domain Multiplexed Computer-generated Holography by Embedded Wavevector Filtering Algorithm

Wu

¹

,

Zhang

²

2020

Preprint

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Computer-generated holography can obtain the wavefront required for constructing arbitrary intensity distributions in space. Currently, speckle noises in holography remain an issue for most computational methods. In addition, there lacks a multiplexing technology by which images from a single hologram and light source can be switched by a lens. In this work, we first come up with a new algorithm to generate holograms to project smoother images by wavevector filtering. Thereupon, we propose a unique multiplexing scheme enabled by a Fourier lens, as the incident light can be decomposed either by a superposition of spherical waves or plane waves. Different images are obtained experimentally in the spatial and wavevector domains, switchable by a lens. The embedded wavevector filtering algorithm provides a new prospective for speckle suppression without the need for postprocessing. The multiplexing technology can double the capacity of current holographic systems and exhibits potential for various interesting display applications.

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“…Maimone et al presented designs for virtual reality (VR) and AR near-eye displays based on phase-only holographic projection, which not only fix minor aberrations but also enable truly compact, eyeglass-like displays with wide fields of view (80°) [10]. Yang et al proposed a fast CGH method with multiple projection images for a near-eye VR and AR 3D display by convoluting the projection images with the corresponding point spread function (PSF) [11]. In 2012, Google released Google Project Glass that can display an operation interface similar to smart phones, and people can operate it through sound or touch sensing devices [12].…”

Section: Introductionmentioning

confidence: 99%

Fusion Coding of 3D Real and Virtual Scenes Information for Augmented Reality-Based Holographic Stereogram

Liu¹,

Yan²,

Liu³

et al. 2021

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In this paper, an optical field coding method for the fusion of real and virtual scenes is proposed to implement an augmented reality (AR)-based holographic stereogram. The occlusion relationship between the real and virtual scenes is analyzed, and a fusion strategy based on instance segmentation and depth determination is proposed. A real three-dimensional (3D) scene sampling system is built, and the foreground contour of the sampled perspective image is extracted by the Mask R-CNN instance segmentation algorithm. The virtual 3D scene is rendered by a computer to obtain the virtual sampled images as well as their depth maps. According to the occlusion relation of the fusion scenes, the pseudo-depth map of the real scene is derived, and the fusion coding of 3D real and virtual scenes information is implemented by the depth information comparison. The optical experiment indicates that AR-based holographic stereogram fabricated by our coding method can reconstruct real and virtual fused 3D scenes with correct occlusion and depth cues on full parallax.

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A Fast Computer-Generated Holographic Method for VR and AR Near-Eye 3D Display

Cited by 14 publications

References 27 publications

Domain multiplexed computer-generated holography by embedded wavevector filtering algorithm

Domain multiplexed computer-generated holography by embedded wavevector filtering algorithm

Domain Multiplexed Computer-generated Holography by Embedded Wavevector Filtering Algorithm

Fusion Coding of 3D Real and Virtual Scenes Information for Augmented Reality-Based Holographic Stereogram

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