Results 211 to 220 of about 7,127 (246)

A Structural Sparse ISAR Imaging Method With Joint Phase Autofocusing

IEEE Geoscience and Remote Sensing Letters
Aiming at improving the performance of sparse aperture inverse synthetic aperture radar (ISAR) imaging under the condition of phase error, an efficient structural sparse imaging algorithm with joint phase autofocusing is proposed in this letter.
M. Lv, Jun Yang, Dangwei Wang, Yinxin Zhu, Wenfeng Chen   +4 more
semanticscholar   +1 more source

Channel capacity and quantum entanglement of autofocusing hypergeometric-Gaussian beams through non-Kolmogorov turbulence

Physica Scripta, 2023
We establish propagation models for distributing autofocusing hypergeometric-Gaussian (HyGG) beams via non-Kolmogorov atmospheric turbulence in the single-photon and biphoton cases.
Xiangjiang Bao, Yun Zhu, Jicheng Wang, Zheng-Da Hu   +3 more
semanticscholar   +1 more source

Separation of antibiotics by autofocusing

ELECTROPHORESIS, 1990
AbstractThe autofocusing separation of nine antibiotics was investigated: tetracycline and chloramphenicol in large‐scale batches, and seven others in gram preparation amounts. All except one were found to be hetergeneous in autofocusing, and 2‐4 well‐characterized fractions emerged. These heterogeneities are described and the industrial utilization of
openaire   +3 more sources

Autofocusing in digital holography based on an adaptive genetic algorithm.

Journal of The Optical Society of America A-optics Image Science and Vision
In digital holography (DH), determining the reconstruction distance is critical to the quality of the reconstructed image. However, traditional focal plane detection methods require considerable time investment to reconstruct and evaluate holograms at ...
Zhongyang Wang, Hongwei Ma, Yuan Chen, Dengxue Liu   +3 more
semanticscholar   +1 more source

The autofocusing system of the IMAT neutron camera

Review of Scientific Instruments, 2013
In this paper, we present the autofocusing system of the imaging instrument to be used on IMAT, a new neutron-imaging facility under construction at the ISIS (UK) target station 2. We have compared 16 different autofocus algorithms to select the one with the best performance. The algorithms have been evaluated by using both a qualitative analysis and a
V Finocchiaro, F Aliotta, D Tresoldi, RC Ponterio, C S Vasi, G Salvato   +5 more
openaire   +5 more sources

Autofocusing for tissue microscopy

Image and Vision Computing, 1993
Abstract This paper describes the implementation of autofocusing for tissue microscopy. We first investigate the suitability of several criterion functions for the evaluation of image sharpness. Since tissue sections are invariably stained, we also discuss the selection of the colour component on which autofocusing will be performed.
Yeo, T., Ong, S., Jayasooriah, Sinniah, R.   +3 more
openaire   +2 more sources

A Sparse Aperture ISAR Imaging and Autofocusing Method Based on Meta-Learning Framework

IEEE Transactions on Antennas and Propagation
The cross-range resolution of inverse synthetic aperture radar (ISAR) images is influenced by undersampled data under the sparse aperture (SA) condition.
Ruize Li, Shuanghui Zhang, Yongxiang Liu, Xiang Li   +3 more
semanticscholar   +1 more source

Rapid autofocusing method for digital fringe projection techniques

Optical Engineering + Applications
This paper presents an autofocusing method that can significantly expedite the autofocusing process in digital fringe projection. The proposed method employs an electrically tunable lens (ETL) to adjust the camera focal length.
Liming Chen, Yuchen Yang, Song Zhang
semanticscholar   +1 more source

Controllable autofocusing circular Pearcey Airyprime beam

Journal of Physics D: Applied Physics
This paper introduces a novel type of abrupt autofocusing beam called the circular Pearcey Airyprime beam (CPApB). Theoretical investigations and experimental verification of the propagation dynamics of the CPApB are conducted.
Shuo Yang, Peixin Yu, Binyu Wu, Xiaolu Ge, Chidao Chen, Zhongsheng Man, Liping Zhang   +6 more
semanticscholar   +1 more source

Nondestructive Inspection and Quantification of Soldering Defects in PCB Using an Autofocusing Digital Holographic Camera

IEEE Transactions on Instrumentation and Measurement, 2023
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 the reconstruction plane.
G. Dwivedi, Lavlesh Pensia, Viney Lohchab, Raj Kumar   +3 more
semanticscholar   +1 more source