scholarly journals A wide field-of-view, modular, high-density diffuse optical tomography system for minimally constrained three-dimensional functional neuroimaging

2020 ◽  
Vol 11 (8) ◽  
pp. 4110 ◽  
Author(s):  
Hubin Zhao ◽  
Sabrina Brigadoi ◽  
Danial Chitnis ◽  
Enrico De Vita ◽  
Marco Castellaro ◽  
...  
Keyword(s):  
Functional Neuroimaging ◽  
Optical Tomography ◽  
Three Dimensional ◽  
Diffuse Optical Tomography ◽  
High Density ◽  
Field Of View ◽  
Wide Field ◽  
Tomography System ◽  
Wide Field Of View

scholarly journals Design and validation of a mechanically flexible and ultra-lightweight high-density diffuse optical tomography system for functional neuroimaging of newborns

2021 ◽  
Vol 8 (01) ◽  
Author(s):  
Hubin Zhao ◽  
Elisabetta M. Frijia ◽  
Ernesto Vidal Rosas ◽  
Liam Collins-Jones ◽  
Greg Smith ◽  
...  
Keyword(s):  
Functional Neuroimaging ◽  
Optical Tomography ◽  
Diffuse Optical Tomography ◽  
High Density ◽  
Tomography System

scholarly journals Functional imaging of the human brain using a modular, fibre-less, high-density diffuse optical tomography system

2016 ◽  
Vol 7 (10) ◽  
pp. 4275 ◽  
Author(s):  
Danial Chitnis ◽  
Robert J. Cooper ◽  
Laura Dempsey ◽  
Samuel Powell ◽  
Simone Quaggia ◽  
...  
Keyword(s):  
Human Brain ◽  
Functional Imaging ◽  
Optical Tomography ◽  
Diffuse Optical Tomography ◽  
High Density ◽  
Tomography System

Hybrid Dual Camera Vision Systems

2011 ◽  
pp. 848-852
Author(s):  
Stefano Cagnoni ◽  
Monica Mordonini ◽  
Luca Mussi ◽  
Giovanni Adorni
Keyword(s):  
Mobile Robotics ◽  
Three Dimensional ◽  
Research Field ◽  
Field Of View ◽  
Wide Field ◽  
Vision Systems ◽  
Visual Systems ◽  
Field Of Vision ◽  
Wide Field Of View ◽  
Critical Requirement

Many of the known visual systems in nature are characterized by a wide field of view allowing animals to keep the whole surrounding environment under control. In this sense, dragonflies are one of the best examples: their compound eyes are made up of thousands of separate light-sensing organs arranged to give nearly a 360° field of vision. However, animals with eyes on the sides of their head have high periscopy but low binocularity, that is their views overlap very little. Differently, raptors’ eyes have a central part that permits them to see far away details with an impressive resolution and their views overlap by about ninety degrees. Those characteristics allow for a globally wide field of view and for accurate stereoscopic vision at the same time, which in turn allows for determination of distance, leading to the ability to develop a sharp, three-dimensional image of a large portion of their view. In mobile robotics applications, autonomous robots are required to react to visual stimuli that may come from any direction at any moment of their activity. In surveillance applications, the opportunity to obtain a field of view as wide as possible is also a critical requirement. For these reasons, a growing interest in omnidirectional vision systems (Benosman 2001), which is still a particularly intriguing research field, has emerged. On the other hand, requirements to be able to carry out object/pattern recognition and classification tasks are opposite, high resolution and accuracy and low distortion being possibly the most important ones. Finally, three-dimensional information extraction can be usually achieved by vision systems that combine the use of at least two sensors at the same time. This article presents the class of hybrid dual camera vision systems. This kind of sensors, inspired by existing visual systems in nature, combines an omnidirectional sensor with a perspective moving camera. In this way it is possible to observe the whole surrounding scene at low resolution, while, at the same time, the perspective camera can be directed to focus on objects of interest with higher resolution.

Comparison of Film and Video Techniques for Estimating Three-Dimensional Coordinates within a Large Field

1992 ◽  
Vol 8 (2) ◽  
pp. 145-151 ◽  
Author(s):  
Rosa M. Angulo ◽  
Jesús Dapena
Keyword(s):  
Video Analysis ◽  
Three Dimensional ◽  
Control Object ◽  
Field Of View ◽  
Large Field ◽  
Wide Field ◽  
Film Analysis ◽  
Analysis Techniques ◽  
Wide Field Of View ◽  
Film And Video

This study compared the errors produced with 3-D video and film analysis techniques using the DLT method with fixed cameras when the images cover a wide field of view. The results indicated that with a large field of view (8 meters) the accuracy of video analysis is clearly inferior to that of film analysis. However, within the volume of the control object, both film and video analyses are still precise enough for most practical purposes. Errors were larger in landmarks outside the control object than in the points of the control object. The maximum errors in the calculated positions of external landmarks were particularly large in the video analysis. However, even these rather large errors for points markedly outside the control object may be acceptable. It will depend on the requirements of each particular investigation.

Development of Wide Field of View Three-Dimensional Field Ion Microscopy and High-Fidelity Reconstruction Algorithms to the Study of Defects in Nuclear Materials

2021 ◽  
Vol 27 (2) ◽  
pp. 365-384
Author(s):  
Benjamin Klaes ◽  
Rodrigue Lardé ◽  
Fabien Delaroche ◽  
Constantinos Hatzoglou ◽  
Stefan Parvianien ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Field Of View ◽  
Nuclear Materials ◽  
High Fidelity ◽  
Wide Field ◽  
Reconstruction Algorithms ◽  
Field Ion Microscopy ◽  
Wide Field Of View ◽  
Ion Microscopy

Abstract

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