High-Resolution Hologram Calculation Method Based on Light Field Image Rendering

Yang, Xin; Xu, Fuyang; Zhang, Han‐Le; Zhang, Hongbo; Huang, Kai; Li, Yong; Wang, QiongHua

doi:10.3390/app10030819

Cited by 7 publications

(9 citation statements)

References 24 publications

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“…From this we can still see the similarities between the hologram structures. After the calculation of the entire hologram is completed, the hologram is combined and divided by the our software, and then exposed on the photoresist using a self-developed holographic printer [18], [19], and then developed by wet processing to form a high-resolution phase-only hologram for optical reconstruction. The relevant details of the holographic printer can be found in the link [26].…”

Section: Resultsmentioning

confidence: 99%

“…Those methods are effective but not all suitable for highresolution hologram calculation due to the large amount of calculation. The fully computed holographic stereogram, frequency fusion method and light field image direct coding method have been proposed for high-resolution hologram calculation [17]- [19]. In reference [17], a high-resolution hologram with 20k×20k pixels was calculated with 32.9 hours.…”

Section: Introductionmentioning

confidence: 99%

“…In reference [17], a high-resolution hologram with 20k×20k pixels was calculated with 32.9 hours. The holograms in references [18] and [19] are with the resolution of 94340×94340 pixels and 200k×200k pixels, respectively. The calculated high-resolution holograms, however, are all amplitude holograms.…”

Section: Introductionmentioning

confidence: 99%

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High-Resolution Phase-Only Holographic 3D Display Based on Light Field Images Rendered in the Frequency Domain

Yang²,

Liu

et al. 2021

IEEE Photonics J.

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Phase-only holograms are more attractive than the amplitude holograms for the higher energy utilization and the possibility to realize on-axis holographic 3D display without conjugate image. In this study, we propose a high-resolution phase-only holographic 3D display using the light field images rendered in the frequency domain. The high-resolution phase-only hologram contains a large number of elemental phase-only holograms (EPHs), and each EPH is calculated from the light field image of the corresponding viewing point in frequency domain through weighted GS (Gerchberg-Saxton) algorithm. Parallel calculation is performed to speed up the calculation in the row direction and the previous EPH is used as the initial phase for the current EPH calculation in order to improve the display quality due to the great similarity between adjacent light field images. Two high-resolution phase-only holograms both with the size of 64 mm×64 mm and the resolution of 200k×200k pixels were calculated and printed by our homemade holographic printer. The full-parallax and high quality 3D displays were verified by optical experiments, which have the potential to be applied in holographic advertising and other fields. Index Terms-Holographic 3D display, light filed 3D display, phase-only hologram, light field image rendering

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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High-Resolution Phase-Only Holographic 3D Display Based on Light Field Images Rendered in the Frequency Domain

Yang²,

Liu

et al. 2021

IEEE Photonics J.

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“…Motivated by this limitation, we have proposed a new experimentally validated integral holographic 3D display without using FFT. The computation time is about 37 min for a high-resolution hologram at the resolution of 200 K × 200 K pixels [23]. However, only a grayscale holographic 3D display was achieved when using white light source as illumination [23].…”

Section: Introductionmentioning

confidence: 99%

“…The computation time is about 37 min for a high-resolution hologram at the resolution of 200 K × 200 K pixels [23]. However, only a grayscale holographic 3D display was achieved when using white light source as illumination [23].…”

Section: Introductionmentioning

confidence: 99%

Fast method for high-resolution holographic 3D display with white light as illumination

Yang¹,

Zhang²,

Song³

et al. 2021

J. Opt.

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In this research, we propose a fast-computational light field image encoding method for a white light high-resolution full-parallax holographic 3D display and full-color rainbow holographic 3D display. With this method, a novel priority-based sequential rendering is used to improve the computation speed. The local visible 3D data is rendered at a higher priority and then used for rendering multiple local element light field images (EIs) at the holographic plane with the corresponding pinhole array behind the holographic plane. The EIs are independently coded as hogels by multiplying the corresponding phase function without using computation-intensive fast Fourier transform. This parallel computation method is implemented for both a full-parallax holographic 3D display and full-color rainbow holographic 3D display. An ultra high-resolution of a full-parallax hologram and a full-color rainbow hologram both at the resolution of 200 000 × 200 000 pixels only cost 14 min and 78 min, respectively. Our experimental results have also shown the effectiveness of the proposed high-resolution 3D display method.

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Artifact reduction in lenslet array near-eye displays

Fujimoto

Sawabe

et al. 2023

Vis Comput

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Lenslet array near-eye displays are a revolutionary technology that generates a virtual image in the field of view of the observer. Although this technology is advantageous in creating compact near-eye displays, undesirable artifacts occur when the user pupil moves outside of the pupil practical movable region (PPMR). Even with dynamic image updating based on eye-tracking techniques, artifacts can still be perceived when human eyes turn rapidly. To enlarge PPMR, we proposed a new rendering method in previous work. To improve the rendering speed in the eye tracking system, look-up tables are used. The disadvantage of the onboard system is the large memory consumption. In this study, we analyzed the system parameters of the incident pupil and pupil margin light columns, the feasibility of the optimized system, and evaluated the optimized system that can adapt to the maximum velocity of the saccadic pupil movement. We optimized the rendering method to reduce memory consumption in the process of generating microdisplay images. In addition, we provide GPU rendering method to improve system speed and reduce system latency to meet the maximum human eye rotation speed. We conducted user studies to evaluate the effect of the method using the optimized rendering method combined with eye tracking to reduce artifacts for fast eye rotation on different images and videos. Results showed that our method effectively reduced artifacts via the optimized rendering method with eye tracking, which adapted to faster human eye movements.

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High-Resolution Hologram Calculation Method Based on Light Field Image Rendering

Cited by 7 publications

References 24 publications

High-Resolution Phase-Only Holographic 3D Display Based on Light Field Images Rendered in the Frequency Domain

High-Resolution Phase-Only Holographic 3D Display Based on Light Field Images Rendered in the Frequency Domain

Fast method for high-resolution holographic 3D display with white light as illumination

Artifact reduction in lenslet array near-eye displays

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