State-of-the-art active optical techniques for three-dimensional surface metrology: a review

AG Marrugo, F Gao, S Zhang - JOSA A, 2020 - opg.optica.org
This paper reviews recent developments of non-contact three-dimensional (3D) surface
metrology using an active structured optical probe. We focus primarily on those active non …

Non-local aggregation for RGB-D semantic segmentation

G Zhang, JH Xue, P Xie, S Yang… - IEEE Signal Processing …, 2021 - ieeexplore.ieee.org
Exploiting both RGB (2D appearance) and Depth (3D geometry) information can improve
the performance of semantic segmentation. However, due to the inherent difference …

Electrically tunable lenses–eliminating mechanical axial movements during high-speed 3D live imaging

C Efstathiou, VM Draviam - Journal of Cell Science, 2021 - journals.biologists.com
The successful investigation of photosensitive and dynamic biological events, such as those
in a proliferating tissue or a dividing cell, requires non-intervening high-speed imaging …

Accurate dynamic 3-D shape measurement based on the fringe pattern super-reconstruction technique

Y Zhao, R Zhu, K Zhang, H Yu, L Bai, D Zheng, J Han - Measurement, 2022 - Elsevier
Fringe projection profilometry (FPP) has been widely used for three-dimensional (3-D)
shape measurement. However, measuring the dynamic objects is always problematic due to …

Large depth-of-field three-dimensional shape measurement with the focal sweep technique

X Hu, S Zhang, Y Zhang, Y Liu, G Wang - Optics Express, 2020 - opg.optica.org
Three-dimensional (3D) shape measurement based on the fringe projection technique has
been extensively used for scientific discoveries and industrial practices. Yet, one of the most …

Autofocusing method for a digital fringe projection system with dual projectors

M Zhong, X Hu, F Chen, C Xiao, D Peng, S Zhang - Optics express, 2020 - opg.optica.org
This paper presents a novel technique to achieve autofocusing for a three-dimensional (3D)
profilometry system with dual projectors. The proposed system uses a camera that is …

Calibration method for a multi-focus microscopic 3D imaging system

L Chen, W Xiang, S Zhang - Optics Letters, 2023 - opg.optica.org
This Letter presents a novel, to the best of our knowledge, method to calibrate multi-focus
microscopic structured-light three-dimensional (3D) imaging systems with an electrically …

Accurate defocusing fringe projection profilometry in a large depth-of-field

H Yu, X Chen, Y Zheng, L Bai, D Zheng, J Han - Optics & Laser Technology, 2023 - Elsevier
Defocusing fringe projection profilometry (DFPP) has been one of the most popular 3-D
measurement techniques. The measurement error caused by the low-contrast patterns …

Practical zoom camera calibration method for close-range photogrammetry

Z Zhang, J Kang, L Feng, Z Sun, B Wu - Optics Letters, 2023 - opg.optica.org
Compared to a conventional fixed focus lens, a zoom lens is more flexible and adaptable.
However, the challenges involved in precise calibration for a zoom camera prevent its …

Flexible calibration method of electronically focus-tunable lenses

X Chen, X Song, L Cheng, Z Ran… - IEEE Transactions …, 2021 - ieeexplore.ieee.org
The calibration of camera systems employing zoom lenses raises several challenges, as
changes in lens control settings introduce various imaging conditions, especially different …