Results 11 to 20 of about 125,304,932 (268)

In the field : the bulletin of the Field Museum of Natural History

v.94:no.2 (2023 ...
Field Museum of Natural History.
core   +23 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

Mitigating Cybersickness in Virtual Reality Systems through Foveated Depth-of-Field Blur

Sensors, 2021
Cybersickness is one of the major roadblocks in the widespread adoption of mixed reality devices. Prolonged exposure to these devices, especially virtual reality devices, can cause users to feel discomfort and nausea, spoiling the immersive experience ...
Razeen Hussain, Manuela Chessa, Fabio Solari   +2 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

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

Flexible Depth of Field Photography [PDF]

IEEE Transactions on Pattern Analysis and Machine Intelligence, 2008
The range of scene depths that appear focused in an image is known as the depth of field (DOF). Conventional cameras are limited by a fundamental trade-off between depth of field and signal-to-noise ratio (SNR). For a dark scene, the aperture of the lens must be opened up to maintain SNR, which causes the DOF to reduce.
Sujit Kuthirummal, Hajime Nagahara, Changyin Zhou, Shree K. Nayar   +3 more
openaire   +2 more sources

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 of the Accommodating Eye [PDF]

Optometry and Vision Science, 2014
ABSTRACT Purpose To obtain experimental values of the depth‐of‐field (DOFi) of the human eye for different accommodative states. Methods First, the monochromatic ocular wavefront of seven eyes from young subjects ...
Bernal-Molina, Paula, Montés-Micó, Robert, Legras, Richard, López-Gil, Norberto   +3 more
openaire   +3 more sources

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