Results 41 to 50 of about 229,869 (143)

Implantation of diffractive extended depth-of-focus intraocular lenses in normal tension glaucoma eyes: A case series

American Journal of Ophthalmology Case Reports, 2023
Purpose: Implantation of presbyopia-correcting intraocular lenses (IOLs) has not been advised for glaucomatous eyes because of the risk of decreased contrast sensitivity with progress of glaucoma.
Hiroko Bissen-Miyajima, Yuka Ota, Kenya Yuki, Keiichiro Minami   +3 more
doaj   +1 more source

Extending Depth of Field for Varifocal Multiview Images

CoRR
Optical imaging systems are generally limited by the depth of field because of the nature of the optics. Therefore, extending depth of field (EDoF) is a fundamental task for meeting the requirements of emerging visual applications. To solve this task, the common practice is using multi-focus images from a single viewpoint.
Zhilong Li, Kejun Wu, Qiong Liu, You Yang   +3 more
openaire   +3 more sources

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

Real-time RGB-D image stitching using multiple Kinects for improved field of view

International Journal of Advanced Robotic Systems, 2017
This article concerns the problems of a defective depth map and limited field of view of Kinect-style RGB-D sensors. An anisotropic diffusion based hole-filling method is proposed to recover invalid depth data in the depth map.
Hengyu Li, Hang Liu, Ning Cao, Yan Peng, Shaorong Xie, Jun Luo, Yu Sun   +6 more
doaj   +1 more source

Stitching of depth and color images from multiple RGB-D sensors for extended field of view

International Journal of Advanced Robotic Systems, 2019
Existing commodity RGB-D sensors have a limited field of view compared with a nearly 360° horizontal field of view of Lidar. This article presents a method to extend the field of view by stitching depth and color images from multiple RGB-D sensors to ...
Changquan Ding, Hang Liu, Hengyu Li
doaj   +1 more source

The BVI ISOPURE® 123 intraocular lens: a new hydrophobic preloaded extended monofocal IOL with intermediate vision correction

Frontiers in Ophthalmology
The BVI ISOPURE® intraocular lens (IOL) (PhysIOL, Liege, Belgium) is a fully refractive, aspherical, monofocal lens based on isofocal technology. Isofocal technology provides cataract patients distance vision quality combined with improved unaided ...
Ejaz Ansari, Ejaz Ansari
doaj   +1 more source

Hybrid Computational Near-Eye Light Field Display

IEEE Photonics Journal, 2019
We propose a hybrid computational near-eye light field display based on micro-lens arrays (MLAs) and structure parameters prioritization method (SPPM) that can render correct accommodation and expand the depth of field (DOF).
Jian Zhao, Qungang Ma, Jun Xia, Jun Wu, Bintao Du, Hao Zhang   +5 more
doaj   +1 more source

Estimation of the frequency and magnetic field dependence of the skin depth in Co-rich magnetic microwires from GMI experiments

Journal of Science: Advanced Materials and Devices, 2016
We studied giant magnetoimpedance (GMI) effect in magnetically soft amorphous Co-rich microwires in the extended frequency range. From obtained experimentally dependences of the GMI ratio on magnetic field at different frequencies we estimated the ...
Arcady Zhukov, Ahmed Talaat, Mihail Ipatov, Alexandr Granovsky, Valentina Zhukova   +4 more
doaj   +1 more source

Random Illumination Microscopy: faster, thicker, and aberration-insensitive

Light: Science & Applications
The Extended Depth of Field (EDF) approach has been combined with Random Illumination Microscopy (RIM) to realize aberration-insensitive, fast super-resolution imaging with extended depth, which is a promising tool for dynamic imaging in larger and ...
Boya Jin, Peng Xi
doaj   +1 more source

Extended depth-of-field microscopic imaging for intact histological samples via self-calibrated diplane network

APL Photonics
Pathological imaging of surgically excised specimens is the gold standard in clinical practice for diagnosing diseases and making treatment decisions.
Yuezhi He, Xu Yang, Shiwei Ye, Zonghua Wen, Peng Liu, Hui Li, Feng Xiang, Jiuling Liao, Yizhou Tan, Haoyong Ning, Junjie Zou, Guilu He, Long Zeng, Yanwu Guo, Hui Li, Ying Gu, Bo Wang, Wei Zheng   +17 more
doaj   +1 more source