High-speed 3D imaging with three binary patterns using Hilbert transform

2019 ◽  
Author(s):  
Jae-Sang Hyun ◽  
Song Zhang
Keyword(s):  
Hilbert Transform ◽  
High Speed ◽  
3D Imaging

scholarly journals The human sperm beats anisotropically and asymmetrically in 3D

2019 ◽  
Author(s):  
Hermes Gadêlha ◽  
Paul Hernández-Herrera ◽  
Fernando Montoya ◽  
Alberto Darszon ◽  
Gabriel Corkidi
Keyword(s):  
Ion Channels ◽  
Mathematical Analysis ◽  
Molecular Motors ◽  
High Speed ◽  
3D Imaging ◽  
Human Sperm ◽  
Travelling Wave ◽  
Fundamental Question ◽  
Sperm Flagellum ◽  
Straight Line

The canonical beating of the human sperm flagellum is postulated to be symmetric. This is despite the reported asymmetries inherent to the flagellar axonemal structure, from distribution and activation of molecular motors to, even, the localisation of regulatory ion channels. This raises a fundamental question: how symmetric beating is possible within such intrinsically asymmetric flagellar complex? Here, we employ high-speed 3D imaging with mathematical analysis capable of resolving the flagellar movement in 4D (3D+time). This reveals that the human sperm beating is both anisotropic and asymmetric, and composed by a superposition of two transversal waves: an asymmetric travelling wave and a symmetric standing wave. This novel anisotropic travelling-pulsation mechanism induces sperm rolling self-organisation and causes a flagellar kinematic illusion, so that the beat appears to be symmetric if observed with 2D microscopy. The 3D beating anisotropy thus regularises the intrinsic flagellar asymmetry to achieve symmetric side-to-side movement and straight-line swimming.

Fast 3D imaging algorithm for high-speed spinning targets based on GRT-CLEAN

2018 ◽  
Vol 33 (3) ◽  
pp. 228-238
Author(s):  
王 会 WANG Hui ◽  
巨 欢 JU Huan ◽  
方 阳 FANG Yang ◽  
李荣旭 LI Rong-xu ◽  
王保平 WANG Bao-ping
Keyword(s):  
High Speed ◽  
3D Imaging ◽  
Imaging Algorithm ◽  
Spinning Targets

High-speed 3D imaging of the beating heart using temporal estimation

1987 ◽  
Vol 39 (3) ◽  
pp. 279-290 ◽  
Author(s):  
R.S. Acharya ◽  
P.B. Heffernan ◽  
R.A. Robb ◽  
H. Wechsler
Keyword(s):  
High Speed ◽  
3D Imaging ◽  
Beating Heart ◽  
Temporal Estimation

scholarly journals High-speed Imaging at 3 Tesla: A Technical and Clinical Review with an Emphasis on Whole-brain 3D Imaging

2004 ◽  
Vol 3 (4) ◽  
pp. 177-187 ◽  
Author(s):  
Shinji NAGANAWA ◽  
Hisashi KAWAI ◽  
Hiroshi FUKATSU ◽  
Takeo ISHIGAKI ◽  
Tomomi KOMADA ◽  
...  
Keyword(s):  
Clinical Review ◽  
High Speed ◽  
3D Imaging ◽  
3 Tesla ◽  
High Speed Imaging ◽  
Whole Brain

Evaluation of high-speed 3D imaging system which utilizes coded wavefront

2004 ◽  
Author(s):  
N. Okada ◽  
Y. Tamura ◽  
C. Ishihara ◽  
M. Miura ◽  
H. Yanagida ◽  
...  
Keyword(s):  
High Speed ◽  
3D Imaging ◽  
Imaging System

scholarly journals High-speed 3D imaging using a chaos lidar system

2022 ◽  
Author(s):  
Hsin-Lin Ho ◽  
Jun-Da Chen ◽  
Ching-An Yang ◽  
Chia-Chi Liu ◽  
Cheng-Ting Lee ◽  
...  
Keyword(s):  
High Speed ◽  
3D Imaging ◽  
Signal To Noise Ratio ◽  
Frame Rate ◽  
System Throughput ◽  
Single Element ◽  
Lidar System ◽  
Practical Applications ◽  
Avalanche Photodetectors ◽  
Outdoor Scenes

AbstractWe characterize a new chaos lidar system configuration and demonstrate its capability for high-speed 3D imaging. Compared with a homodyned scheme employing single-element avalanche photodetectors (APDs), the proposed scheme utilizes a fiber Bragg grating and quadrant APDs to substantially increase the system throughput, frame rate, and field-of-view. By quantitatively analyzing the signal-to-noise ratio, peak-to-standard deviation of the sidelobe level, precision, and detection probability, we show that the proposed scheme has better detection performance suitable for practical applications. To show the feasibility of the chaos lidar system, while under the constrain of eye-safe regulation, we demonstrate high-speed 3D imaging with indoor and outdoor scenes at a throughput of 100 kHz, a frame rate of 10 Hz, and a FOV of 24.5$$^\circ $$ ∘ $$\times $$ × 11.5$$^\circ $$ ∘ for the first time.

High-speed 3D imaging based on structured illumination and electrically tunable lens

2017 ◽  
Vol 15 (9) ◽  
pp. 090004 ◽  
Author(s):  
Dongping Wang Dongping Wang ◽  
Yunlong Meng Yunlong Meng ◽  
Dihan Chen Dihan Chen ◽  
Yeung Yam Yeung Yam ◽  
Shih-Chi Chen Shih-Chi Chen
Keyword(s):  
High Speed ◽  
3D Imaging ◽  
Structured Illumination ◽  
Tunable Lens
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