Wavelet compression of off-axis digital holograms using real/imaginary and amplitude/phase parts

Cheremkhin, Pavel A.; Курбатова, Е. А.

doi:10.1038/s41598-019-44119-0

Cited by 26 publications

(10 citation statements)

References 76 publications

(133 reference statements)

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“…Holograms and holographic videos can have large sizes. To store and transmit them, compression should be used [24,[87][88][89][90][91]. The proposed method was analyzed for the compressed holograms.…”

Section: Optical Experiments Resultsmentioning

confidence: 99%

An optical-digital method of noise suppression in digital holography

Cheremkhin

Evtikhiev²,

Kozlov³

et al. 2022

J. Opt.

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Digital holography is widely used for the fast and accurate reconstruction of objects and 3D-scenes characteristics: intensity, depth locations, density, temperature, refractive index, etc. There are various types of noise in digital holography, including speckle noise, zero order and twin image, camera shot noise and fixed-pattern noise. Therefore, additional hologram processing is required to obtain a high-quality reconstructed image. This paper proposes an optical-digital method of noise suppression in digital holography. First, a set of uncorrelated holograms is registered. The reconstructed images are treated as a 3D array, to which a 3D filter is then applied. A 3D median filter is used in this study; however, other 3D filters based on weighted average can be utilized also. The proposed method was verified using computer-generated and optically registered digital Fresnel holograms. Even with a small number of images, the method significantly improves the quality: the normalized standard deviation was decreased by up to 3-10 times and speckle contrast was reduced by more than six times. Registration of only ten holograms is sufficient to obtain a quality close to the maximum. The flexibility of the proposed method allows for varying the ratio of the reconstruction quality to the processing time.

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Section: Optical Experiments Resultsmentioning

confidence: 99%

An optical-digital method of noise suppression in digital holography

Cheremkhin

Evtikhiev²,

Kozlov³

et al. 2022

J. Opt.

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show abstract

“…They speed-up their approach by inserting the reversible modulo operator, resulting in the right candidate for real-time hologram compression systems. Cheremkhin and Kurbatova [13] proposed a method using Meyer and reverse biorthogonal wavelets to compress off-axis digital holograms. The suggested method uses frequency filtering, wavelet decomposition, threshold processing, and quantization.…”

Section: Wavelet-based Methodsmentioning

confidence: 99%

A novel high-efficiency holography image compression method, based on HEVC, Wavelet, and nearest-neighbor interpolation

Hajihashemi

Najafabadi

Gharahbagh

et al. 2021

Multimed Tools Appl

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One of the critical challenges facing 3D video systems and images such as holography lies in their compression technique. High-efficiency video coding (HEVC) has emerged as one of the leading schemes to address this challenge. In this article, a novel method based on wavelet transform is presented to improve HEVC, particularly in digital holography systems (object plane). In this regard, wavelet and resizing are included in the coding process, while extra HEVC decoders and encoders are added to predict and decrease errors in the target. Simulation results reveals that the proposed algorithm reduces Bjøntegaard-Delta (BD) bitrate 17.5% (based on average BD-Rate values) compared to the original HEVC (H.265) scheme while maintaining signal fidelity and even enhancing it slightly. We observe an increased BDpeak-signal-to-noise ratio (BD-PSNR) in real and imaginary parts of digital holograms of high rate quantization values up to 1.1 dB.

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“…In addition, the data processing step is responsible for the compression of the fused data to speed up the transmission and reconstruction, and reduce the required data transmission rate and storage in holographic communication (Kurbatova et al, 2015;Cheremkhin and Kurbatova, 2019). The compressed data for the 3D representation is then encoded and transmitted over a network.…”

Section: Basic Implementation Proceduresmentioning

confidence: 99%

Toward immersive communications in 6G

Shen

Gao

et al. 2023

Front. Comput. Sci.

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The sixth generation (6G) networks are expected to enable immersive communications and bridge the physical and the virtual worlds. Integrating extended reality, holography, and haptics, immersive communications will revolutionize how people work, entertain, and communicate by enabling lifelike interactions. However, the unprecedented demand for data transmission rate and the stringent requirements on latency and reliability create challenges for 6G networks to support immersive communications. In this survey article, we present the prospect of immersive communications and investigate emerging solutions to the corresponding challenges for 6G. First, we introduce use cases of immersive communications, in the fields of entertainment, education, and healthcare. Second, we present the concepts of immersive communications, including extended reality, haptic communication, and holographic communication, their basic implementation procedures, and their requirements on networks in terms of transmission rate, latency, and reliability. Third, we summarize the potential solutions to addressing the challenges from the aspects of communication, computing, and networking. Finally, we discuss future research directions and conclude this study.

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Wavelet compression of off-axis digital holograms using real/imaginary and amplitude/phase parts

Cited by 26 publications

References 76 publications

An optical-digital method of noise suppression in digital holography

An optical-digital method of noise suppression in digital holography

A novel high-efficiency holography image compression method, based on HEVC, Wavelet, and nearest-neighbor interpolation

Toward immersive communications in 6G

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