Compression of 3D dynamic holographic scenes in the Fresnel domain

Trejos, Sorayda; Gómez, Melisa Domínguez; Velez-Zea, Alejandro; Barrera-Ramírez, John Fredy; Torroba, Roberto

doi:10.1364/ao.383578

Cited by 7 publications

(3 citation statements)

References 67 publications

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“…First, we process each phase to obtain an OFD with the same resolution as the LCOS-SLM (1920 × 1080 pixels). Next, we multiply the processed OFD by a phase grating and phase lens to control the position of the reconstructed object [49]. Finally, the transforming lens allows for the recovery of the object which is projected on the screen and registered with the camera.…”

Section: Cr =mentioning

confidence: 99%

Quality guided alternative holographic data representation for high performance lossy compression

Gómez-Valencia

Trejos

Velez-Zea

et al. 2021

J. Opt.

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We analyze several representations for holographic data and determine the effectiveness of a common lossy compression algorithm for each representation. We demonstrate that a phase–amplitude representation, when used to represent holograms of diffuse objects, can be combined with a phase unwrapping algorithm to achieve much higher compression ratios (CRs) than direct compression of the complex valued holographic data. We compare the compression performance of the JPEG algorithm for several conventional and alternative holographic data representations. Additionally, we test two different phase unwrapping algorithms to improve phase compression performance. In particular, we propose and evaluate an alternative phase representation based on a quality guided phase unwrapping algorithm. This alternative representation offers higher performance to the other tested approaches, achieving CRs over 6 with a limited quality loss after reconstruction. We add the experimental reconstruction of the processed holograms to further validate our proposal.

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Section: Cr =mentioning

confidence: 99%

Quality guided alternative holographic data representation for high performance lossy compression

Gómez-Valencia

Trejos

Velez-Zea

et al. 2021

J. Opt.

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“…The transmission of 3D holographic video content along conventional communication channels requires substantial compression of the holographic information, as demonstrated in [1][2][3][4][5]. It is shown in [6], through the analysis of the modern situation in this area, that the traditional methods of entropy coding are currently far from being able to implement a 10 6 -fold compression of the holographic information, which is necessary for transmission.…”

Section: Introductionmentioning

confidence: 99%

Structured Light Patterns Work Like a Hologram

Shoydin

Pazoev

2023

Applied Sciences

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The subject of this investigation is light diffraction from a structure formed at the lateral projection of structured light on the surface of a 3D object. It is demonstrated that the patterns of vertically structured light fringes change their structure during the lateral illumination of a 3D object, and take on the properties of holograms. The diffraction of light from this structure forms several diffraction orders, and one of them can restore the image of the 3D object. Results of the numerical experiment demonstrating the possibility to restore 3D holographic images by these patterns at a wavelength corresponding to Bragg conditions are presented. The obtained result allows an order of magnitude higher compression of the holographic information about a 3D object to be transmitted along the communication channel, in a volume that is sufficient for visual perception, and for the observation of both the horizontal and vertical continuous parallax. Results of the experiments on the transmission of this compressed information are presented to demonstrate that the TV frame rate frequency of the 3D holographic video sequence is quite achievable.

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“…This allows us to project and record the video's frames individually and then obtain a package containing the entire video by multiplexing. While similar approaches have been demonstrated by means of theta modulation [4,37], spatial multiplexing [38] and sampling with binary masks [39,40], all of these works made use of a SLM instead of a DMD as input device.…”

Section: Introductionmentioning

confidence: 99%

Experimental Fresnel and Fourier digital holography using a digital micro-mirror device

Jaramillo-Osorio¹,

Quinchia²,

Muñoz³

et al. 2021

J. Opt.

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We present an experimental off-axis optical holographic scheme employing a digital micromirror device (DMD) as projecting media instead of a liquid crystal spatial light modulator (SLM). The DMD allows projecting information through light reflection. We perform holographic recording in the Fourier and the Fresnel domains under similar experimental configurations to test our experimental scheme and verify the DMD performance as a binary amplitude SLM. For the digital holographic recovery process of Fourier holograms, we applied a non-linear modification that allows reducing the degradation in the recovered data. We also implement a multiplexing protocol enabling the packaging of an entire holographic dynamic scene into a single data. Furthermore, we use QR codes as information containers to achieve noise-free information recovery after holographic reconstruction. Experimental results demonstrate the viability and versatility of a DMD in an experimental holographic scheme.

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Compression of 3D dynamic holographic scenes in the Fresnel domain

Cited by 7 publications

References 67 publications

Quality guided alternative holographic data representation for high performance lossy compression

Quality guided alternative holographic data representation for high performance lossy compression

Structured Light Patterns Work Like a Hologram

Experimental Fresnel and Fourier digital holography using a digital micro-mirror device

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