Results 131 to 140 of about 4,513 (162)

High-speed autofocusing of multisized microobjects

2012 IEEE International Conference on Automation Science and Engineering (CASE), 2012
This paper proposes a new high-speed autofocus algorithm for observing multisized microobjects under a transmitted light microscope. The method estimates the blurriness of the object by analyzing the intensity variation of a defined region around the object border in the frequency domain. A defocus function is proposed so that the best focused position
Chanh-Nghiem Nguyen, Kenichi Ohara, Tomohito Takubo, Yasushi Mae, Tatsuo Arai   +4 more
openaire   +1 more source

Adaptive autofocusing: a closed-loop perspective

Journal of the Optical Society of America A, 2005
We present an adaptive autofocusing scheme. In this scheme, the focus measure is updated with focus tuning. To achieve this, we construct the focus measure by using image moments and develop an adaptive focus-tuning strategy to estimate the measure in closed loop.
Ying, Zhang, Changyun, Wen, Yeng Chai, Soh, Aik Meng, Fong   +3 more
openaire   +2 more sources

Autofocusing based on power-spectra analysis

Applied Optics, 1994
An autofocusing mechanism based on the concept of autocorrelation is described. The method may be performed optically with ring detectors in the Fourier domain or electronically with a special computing chip or software.
S, Jutamulia, T, Asakura, R D, Bahuguna, P C, De Guzman   +3 more
openaire   +2 more sources

Three-Airy Beams and Their Autofocusing Plane

Bulletin of the Russian Academy of Sciences: Physics
The position of the autofocusing plane of three-Airy beams is studied theoretically and experimentally depending on the shift parameter. It is shown that for different values of this parameter, the three-Airy beam may or may not have an autofocusing plane. If the beam has an autofocusing plane, then with increasing absolute value of the shift parameter,
D. V. Prokopova, E. G. Abramochkin
openaire   +1 more source

Differentiable Beamforming for Ultrasound Autofocusing

2023
Walter Simson, Louise Zhuang, Sergio J. Sanabria, Neha Antil, Jeremy J. Dahl, Dongwoon Hyun   +5 more
openaire   +1 more source

Elastic Autofocusing

Proceedings, 2014
C.A. da Costa, M. Ravasi, G. Meles, A. Curtis   +3 more
openaire   +1 more source

Multi-Subaperture Interference for SAR Autofocusing

IGARSS 2023 - 2023 IEEE International Geoscience and Remote Sensing Symposium, 2023
Chi He, Yuhui Deng, Guang-Cai Sun, Mengdao Xing   +3 more
openaire   +1 more source

Single-Shot Autofocusing of Microscopy Images Using Deep Learning

ACS Photonics, 2021
Yi Luo, LuZhe Huang, Yair Rivenson
exaly  

Propagation dynamics of abruptly autofocusing circular Airyprime beam with an optical vortex

Optics and Laser Technology, 2022
Xiang Zang, Wensong Dan, Guoquan Zhou
exaly  

Design and realization of an autofocusing Airyprime beams array

Optics and Laser Technology, 2023
Xiang Zang, Wensong Dan, Rui-Pin Chen
exaly