Computer-generated phase-modulated full parallax holographic stereograms without conjugate images

Pei, Chuang; Yan, Xingpeng; Jiang, Xiaoyu

doi:10.1117/1.oe.53.10.103105

Cited by 5 publications

(3 citation statements)

References 23 publications

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“…Before presenting the modified method, we describe the principle of holographic stereogram for dual-view 3D display based on integral imaging (InI) according to Ref. [11]. The mixed EIA composed of the left-view EIs and right-view EIs obtained by computational InI.…”

Section: Principle Of Dual-view Holographic Stereogram Based On Optim...mentioning

confidence: 99%

The application of optimized phase to generate holographic stereogram for a dual-view 3D display

He,

Wang,

Wang

et al. 2023

Third International Computing Imaging Conference (CITA 2023)

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Holographic stereogram, as a marriage of holography and multi-view display technique, benefits of these two 3D display technologies. Recent research about the dual-view holographic stereogram 3D display technology shows an attractive way to present the visual information. However, due to the utilization of the random phase to smooth the spatial frequency spectrum, the troublesome of the quality of reconstructed images from holographic stereograms are those images containing speckle noise. In this paper, inspiring by the works about the computer-generated holograms, we introduced an optimized phase for the generation of dual-view holographic stereogram based on integral imaging to get a better suppression effect of speckle noise. The key goal is to determine the complex amplitude employed to calculate the holographic stereogram. Firstly, the pickup process of multiple parallax images corresponding to the left-view field and right-view field are finished by the virtual cameras. Then, the optimized phase is generated by the full-support iterative process, whose phase range is limited in the first time. Next, instead of the random phase, it is combined with corresponding parallax image to yield the complex amplitude. Holographic stereogram plane is segmented into many element holograms and each of them is generated by the Fourier transforming of the above complex amplitude. The phase of each complex element holograms is retained to generated the phase-only holographic stereogram, which have higher diffraction efficiency and no conjugate image than amplitude type holographic stereogram. Finally, the two set of holograms are combined together to reconstruct the corresponding dual-view. The optimized phase as the initial phase is demonstrated by simulations, the comparison of the simulated reconstructions shows that the method of this paper could improve the reproduction quality of the dual-view holographic stereogram, that extended its applicability and practicality.

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Section: Principle Of Dual-view Holographic Stereogram Based On Optim...mentioning

confidence: 99%

The application of optimized phase to generate holographic stereogram for a dual-view 3D display

He,

Wang,

Wang

et al. 2023

Third International Computing Imaging Conference (CITA 2023)

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“…However, full parallax displays, similar to the real world, are the ultimate target of holographic stereogram systems. Therefore, we have proposed a phase-modulated full parallax holographic stereogram system [25][26][27], and have realized a full parallax display based on phase-only SLMs.…”

Section: Introductionmentioning

confidence: 99%

Bandwidth compression of full parallax holographic stereogram using nonuniform sampling

Pei¹,

Yan²,

Yan³

et al. 2015

J. Opt.

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A novel nonuniform sampling method for bandwidth compression of full parallax holographic stereograms is presented. The configuration of the holographic stereograms and the angular-frequency characteristics of the holographic element on the holographic plane are investigated. The sampling angular-frequencies are chosen for each hogel according to their spectral distribution. Sampling and decompression process for low-pass and band-pass hogels are both introduced. The decompressed hogels can reconstruct their angular spectral distributions accurately, which demonstrates that the nonuniform sampling is a lossless method. Simulation experiments are carried out to verify the proposed method. The results indicate that the method can reduce the number of samples to 46.26% of that of the traditional uniform sampling method, and the decompressed holographic stereogram can reconstruct full parallax images of a 3D object with high quality.

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“…The observation of the two different floating 2D holographic images by both eyes produces binocular disparity without the vergence‐accommodation conflict. However, conventional holographic stereograms using micrometer‐scale pixels suffer from undesired multiple diffraction orders, that duplicate the same holographic images, and the narrowing of the viewing angle by only a few degrees 7,15,16. To widen the viewing angle, complex optics, such as multiple spatial light modulators8 and microlens arrays,9 and their precise control are required.…”

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confidence: 99%

Optical Metasurface‐Based Holographic Stereogram

Choi

Lee

Jung

et al. 2020

Advanced Optical Materials

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binocular disparity is the most sensitive physiological depth cue for 3D objects with a size and distance of ≈10 m or less (Figure 1a). [5] Eyeglasses-based stereoscopy has been representative for raising binocular depth cues, but the vergenceaccommodation conflict limits their comfort and applicability significantly. [6] Recently, the holographic stereoscopic [7][8][9][10] and multiview displays [11][12][13][14] have been suggested as a promising alternative to the eyeglasses-based stereoscopic. The observation of the two different floating 2D holographic images by both eyes produces binocular disparity without the vergenceaccommodation conflict. However, conventional holographic stereograms using micrometer-scale pixels suffer from undesired multiple diffraction orders, that duplicate the same holographic images, and the narrowing of the viewing angle by only a few degrees. [7,15,16] To widen the viewing angle, complex optics, such as multiple spatial light modulators [8] and microlens arrays, [9] and their precise control are required.Optical metasurfaces consisting of meta-atoms arranged on the sub-wavelength scale can display holographic images over a wide viewing angle without multiple diffraction orders. [17][18][19][20] Owing to the large-scale integration of high-performance metaatoms, optical metasurfaces enable to manipulate the wavefront of light exquisitely without requiring complex optics and to implement a variety of 3D holograms with advanced features and functions such as polarization-/helicity-/angle-dependent multiplexing, [21][22][23][24][25][26][27] complete control of the holographic amplitude and phase, [28][29][30] bright, multicolor holography, [31][32][33] and active and programmable holograms. [34,35] However, research on metasurface-based 3D hologram displays has focused only on the creation of monocular depth cues so far. [19,28,30,32,35] In this research, we present a novel method based on optical metasurfaces to generate holographic stereograms addressing binocular depth cues. The optical metasurface consists of several hologram pieces which produce directionally propagating holographic wavefronts and display 2D holographic images suitable for stereopsis without mutual cross-talk ( Figure 1b). We developed a modified Gerchberg-Saxton (GS) algorithm involving a spatial Fourier filter to calculate the phase and amplitude distribution of the metasurface for holographic stereogram generation. The demonstrated metasurface displays a high-quality transmissive holographic stereogram of a 3D structure with a volume of 25 × 25 × 25 µm 3 over a wide viewing angle of more than ±30°. We expect that in the future, large-scale optical metasurfaces with enough meta-atoms to simultaneously produce all the monocular Holographic stereography providing binocular depth cues is one of the most promising technologies for 3D displays. However, conventional holographic stereograms based on micrometer-scale pixels suffer from multiple diffraction orders and narrow viewing angles. Optical metasurfaces with s...

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Computer-generated phase-modulated full parallax holographic stereograms without conjugate images

Cited by 5 publications

References 23 publications

The application of optimized phase to generate holographic stereogram for a dual-view 3D display

The application of optimized phase to generate holographic stereogram for a dual-view 3D display

Bandwidth compression of full parallax holographic stereogram using nonuniform sampling

Optical Metasurface‐Based Holographic Stereogram

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