Results 31 to 40 of about 214,201 (239)

Test of the Practicality and Feasibility of EDoF-Empowered Image Sensors for Long-Range Biometrics

Sensors, 2016
For many practical applications of image sensors, how to extend the depth-of-field (DoF) is an important research topic; if successfully implemented, it could be beneficial in various applications, from photography to biometrics. In this work, we want to
Sheng-Hsun Hsieh, Yung-Hui Li, Chung-Hao Tien   +2 more
doaj   +1 more source

Extended depth-of-field in integral imaging by depth-dependent deconvolution

SPIE Proceedings, 2013
Integral Imaging is a technique to obtain true color 3D images that can provide full and continuous motion parallax for several viewers. The depth of field of these systems is mainly limited by the numerical aperture of each lenslet of the microlens array. A digital method has been developed to increase the depth of field of Integral Imaging systems in
Héctor Navarro Fructuoso, Genaro Saavedra, Manuel Martínez-Corral, Mårten Sjöström, Roger Olsson   +4 more
openaire   +3 more sources

Investigation of extended depth-of-field f/8 camera with optimized cubic phase mask and digital restoration [PDF]

EPJ Web of Conferences, 2020
An investigation of extended depth-of-field camera with optimized phase mask and digital restoration is presented. The goal of this paper is to implement the wavefront coding technique without affecting much of the original design, and the design has ...
Chiu Po-Sheng, Vonmetz Kurt, Canini Federico, Urbach H. Paul   +3 more
doaj   +1 more source

Optical ptychography with extended depth of field [PDF]

Journal of Physics: Conference Series, 2017
Ptychography is an increasingly popular phase imaging technique. However, like any imaging technique it has a depth of field that limits the volume of a thick specimen that can be imaged in focus. Here, we have proposed to extend the depth of field using a multislice calculation model; an optical experiment successfully demonstrates our proposal.
Li, P., Maiden, A.
openaire   +2 more sources

Freeform optics for variable extended depth of field imaging

Optics Express, 2021
Imaging depth of field is shallow in applications with high magnification and high numerical aperture, such as microscopy, resulting in images with in- and out-of-focus regions. Therefore, methods to extend depth of field are of particular interest. Researchers have previously shown the advantages of using freeform components to extend depth of field ...
Sara Moein, Thomas J. Suleski
openaire   +2 more sources

Multispectral Extended Depth-of-Field Imaging via Stochastic Wavefront Optimization

IEEE Open Journal of Signal Processing
Extended depth-of-field (EDoF) is a desirable attribute for imaging systems where all features in the scene are in focus despite their relative distance.
Exequiel Oliva, Nelson Diaz, Samuel Pinilla, Esteban Vera   +3 more
doaj   +1 more source

All-in-Focus Sweep Imaging Based on Wigner Distribution Function

IEEE Access, 2018
To extend the depth of field, the all-in-focus image can be achieved via the computational imaging method by designing the data acquisition process under the condition of maintaining the signal-to-noise ratio.
Chang Liu, Shan Gao, Xing Zhao, Jun Qiu
doaj   +1 more source

Monocular metasurface camera for passive single-shot 4D imaging

Nature Communications, 2023
The authors present a monocular camera equipped with a single-layer metalens for passive single-shot 4D imaging. It can simultaneously perform high-accuracy depth sensing and highfidelity polarization imaging over an extended depth of field.
Zicheng Shen, Feng Zhao, Chunqi Jin, Shuai Wang, Liangcai Cao, Yuanmu Yang   +5 more
doaj   +1 more source

Depth-of-Field-Extended Plenoptic Camera Based on Tunable Multi-Focus Liquid-Crystal Microlens Array

Sensors, 2020
Plenoptic cameras have received a wide range of research interest because it can record the 4D plenoptic function or radiance including the radiation power and ray direction.
Mingce Chen, Wenda He, Dong Wei, Chai Hu, Jiashuo Shi, Xinyu Zhang, Haiwei Wang, Changsheng Xie   +7 more
doaj   +1 more source

Spatiotemporal and quantitative analyses of phosphoinositides – fluorescent probe—and mass spectrometry‐based approaches

FEBS Letters, EarlyView.
Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho, Shin Morioka, Junko Sasaki, Takehiko Sasaki   +3 more
wiley   +1 more source