Results 11 to 20 of about 763,372 (283)

Trilobite-inspired neural nanophotonic light-field camera with extreme depth-of-field [PDF]

Nature Communications, 2022
Inspired by the optical structure of bifocal compound eyes, the authors demonstrate a nanophotonic light-field camera with large depth of field. By using a spin-multiplexed bifocal metalens array and neural network-based reconstruction, they capture high-
Qingbin Fan, Weizhu Xu, Xuemei Hu, Wenqi Zhu, Tao Yue, Cheng Zhang, Feng Yan, Lu Chen, Henri J. Lezec, Yanqing Lu, Amit Agrawal, Ting Xu   +11 more
doaj   +2 more sources

Rotary Panoramic and Full-Depth-of-Field Imaging System for Pipeline Inspection [PDF]

Sensors
To address the adaptability and insufficient imaging quality of conventional in-pipe imaging techniques for irregular pipelines or unstructured scenes, this study proposes a novel radial rotating full-depth-of-field focusing imaging system designed to ...
Qiang Xing, Xueqin Zhao, Kun Song, Jiawen Jiang, Xinhao Wang, Yuanyuan Huang, Haodong Wei   +6 more
doaj   +2 more sources

Speckle structured illumination endoscopy with enhanced resolution at wide field of view and depth of field

Opto-Electronic Advances, 2023
Structured illumination microscopy (SIM) is one of the most widely applied wide field super resolution imaging techniques with high temporal resolution and low phototoxicity.
Elizabeth Abraham, Junxiao Zhou, Zhaowei Liu   +2 more
doaj   +3 more sources

Tunable meta-device for large depth of field quantitative phase imaging [PDF]

Nanophotonics
In traditional optical imaging, image sensors only record intensity information, and phase information of transparent samples such as cells and semiconductor materials is hard to obtain.
Cheng Jialuo, Geng Zihan, Zhou Yin, Luo Zhendong, Liu Xiaoyuan, Xiang Yinuo, Zhou Junxiao, Chen Mu Ku   +7 more
doaj   +2 more sources

Siamese Networks Based Deep Fusion Framework for Multi-Source Satellite Imagery

IEEE Access, 2022
A critical aim of pansharpening is to fuse coherent spatial and spectral features from panchromatic and multispectral images respectively. This study proposes deep siamese network based pansharpening model as a two-stage framework in a multiscale setting.
Hannan Adeel, Javaria Tahir, M. Mohsin Riaz, Syed Sohaib Ali   +3 more
doaj   +1 more source

Using Gaze-Contingent Depth of Field to Facilitate Depth Perception [PDF]

i-Perception, 2014
The lens system of the human eye has a limited depth of field that creates blur patterns that depend on its focus and the relative distances of the observed objects.
M Mauderer, S.I Conte, M.A Nacenta, D Vishwanath   +3 more
doaj   +1 more source

Learning Wavefront Coding for Extended Depth of Field Imaging [PDF]

, 2020
Depth of field is an important factor of imaging systems that highly affects the quality of the acquired spatial information. Extended depth of field (EDoF) imaging is a challenging ill-posed problem and has been extensively addressed in the literature ...
Akpinar, Ugur, Gotchev, Atanas, Meem, Monjurul, Menon, Rajesh, Sahin, Erdem   +4 more
core   +2 more sources

Multi-Object Deep-Field Digital Holographic Imaging Based on Inverse Cross-Correlation

Applied Sciences, 2023
To address the complexity of small or unique reconstruction distances in digital holography, we propose an inverse cross-correlation-based algorithm for the digital holographic imaging of multiplanar objects with a large depth of field. In this method, a
Jieming Zhao, Zhan Gao, Shengjia Wang, Yuhao Niu, Lin Deng, Ye Sa   +5 more
doaj   +1 more source

Depth-sensing technology using a negative microlens array

International Journal of Optomechatronics, 2021
In this study, an optical depth-sensing system whose focus distance was equal to its object distance was constructed by using a lens with a shortened depth of field.
Chih-Hsiung Lin, Kun-Huang Chen
doaj   +1 more source

Depth of Field Extension in Laser Speckle Contrast Imaging

IEEE Access, 2020
A new technique that can increase the depth of field (DOF) for in vivo tissue imaging is presented. Extended DOF for the imaging of strongly scattering media is realized through combining laser speckle contrast imaging (LSCI) with light field (LF ...
Xiaohui Ma, Anting Wang, Fenghua Ma, Shuimei Wu, Hai Ming, Qiwen Zhan   +5 more
doaj   +1 more source