On the use of deep learning for phase recovery

K Wang, L Song, C Wang, Z Ren, G Zhao… - Light: Science & …, 2024 - nature.com
Phase recovery (PR) refers to calculating the phase of the light field from its intensity
measurements. As exemplified from quantitative phase imaging and coherent diffraction …

Learning-based nonparametric autofocusing for digital holography

Z Ren, Z Xu, EY Lam - Optica, 2018 - opg.optica.org
In digital holography, it is crucial to extract the object distance from a hologram in order to
reconstruct its amplitude and phase. This is known as autofocusing, which is conventionally …

Convolutional neural network-based regression for depth prediction in digital holography

T Shimobaba, T Kakue, T Ito - 2018 IEEE 27th International …, 2018 - ieeexplore.ieee.org
Digital holography enables us to reconstruct objects in three-dimensional space from
holograms captured by an imaging device. For the reconstruction, we need to know the …

Autofocusing in digital holography using deep learning

Z Ren, Z Xu, EY Lam - Three-Dimensional and …, 2018 - spiedigitallibrary.org
In digital holography, it is critical to know the distance in order to reconstruct the multi-
sectional object. This autofocusing is traditionally solved by reconstructing a stack of in-focus …

Automatic focusing for multisectional objects in digital holography using the structure tensor

Z Ren, N Chen, EY Lam - Optics letters, 2017 - opg.optica.org
Determining the axial position of the recorded object in digital holography is a crucial step
for image reconstruction. When multiple discrete sections of a three-dimensional object are …

Non-destructive inspection and quantification of soldering defects in PCB using an autofocusing digital holographic camera

G Dwivedi, L Pensia, V Lohchab… - IEEE Transactions on …, 2023 - ieeexplore.ieee.org
The essential requirements for any digital holography-based system to get employed as an
inspection device in electronic industry are portability and ability to automatically focus on …

Providing a visual understanding of holography through phase space representations

T Birnbaum, T Kozacki, P Schelkens - Applied Sciences, 2020 - mdpi.com
Featured Application Visually interpretable phase space representations can aid the
development of new methodologies in digital holography in general and can be evaluated …

Fast numerical autofocus of multispectral complex fields in digital holographic microscopy with a criterion based on the phase in the Fourier domain

J Dohet-Eraly, C Yourassowsky, F Dubois - Optics letters, 2016 - opg.optica.org
The knowledge of the complex amplitude of optical fields, that is, both quantitative phase
and intensity, enables numeric reconstruction along the optical axis. Nonetheless, a criterion …

PS-NET: an end-to-end phase space depth estimation approach for computer-generated holograms

N Madali, A Gilles, P Gioia, L Morin - Optics Express, 2024 - opg.optica.org
In the present work, an end-to-end approach is proposed for recovering an RGB-D scene
representation directly from a hologram using its phase space representation. The proposed …

Automatic focus determination through cosine and modified cosine score in digital holography

A He, W Xiao, F Pan - Optical Engineering, 2017 - spiedigitallibrary.org
An automatic focus determination method in digital holography that utilizes the cosine score
(CS) of the inner angle between the vectors that result from adjacent axial reconstructed …