نتایج جستجو برای: fov

تعداد نتایج: 2793  

Journal: :Vision Research 2007
Francesca C. Fortenbaugh John C. Hicks Lei Hao Kathleen A. Turano

Three experiments examine how the peripheral visual field (PVF) mediates the development of spatial representations. In Experiment 1 participants learned and were tested on statue locations in a virtual environment while their field-of-view (FOV) was restricted to 40 degrees , 20 degrees , 10 degrees , or 0 degrees (diam). As FOV decreased, overall placement errors, estimated distances, and ang...

Journal: :EURASIP Journal on Advances in Signal Processing 2023

Abstract In this paper, we consider multi-sensor with partly overlapping field of view (FoV) in the labeled random finite set (L-RFS) framework. This is different from most existing tracking algorithms, where sensors are assumed to have same FoV. We describe FoV by modeling probability detection for individual whole observation area and can be seen as range all these using generalized multi-Ber...

Journal: :Journal of vision 2017
Rosemary Le Nathan Witthoft Michal Ben-Shachar Brian Wandell

Skilled reading requires rapidly recognizing letters and word forms; people learn this skill best for words presented in the central visual field. Measurements over the last decade have shown that when children learn to read, responses within ventral occipito-temporal cortex (VOT) become increasingly selective to word forms. We call these regions the VOT reading circuitry (VOTRC). The portion o...

1999
B. MADORE

Introduction: Several MRI applications involve imaging a dynamic object to resolve its temporal behavior. In such applications, it is often difficult to achieve the desired temporal resolution while maintaining the required spatial resolution and fieldof-view (FOV). Methods have been developed to increase the temporal resolution in the special case where only a fraction of the FOV undergoes dyn...

2009
E. Kopanoglu A. F. Yilmaz T. Demir V. B. Erturk E. Atalar

Introduction In nearly all magnetic resonance imaging (MRI) applications, gradient coils are used for data encoding. Although an arbitrarily oriented slice can be selected, gradient coils limit the field-of-view (FOV) to a rectangular region and the slice to a plane. However, in a considerable fraction of MRI applications, the region of interest (ROI) is merely a portion of the selected slice. ...

2014
Magdalena Herbst Frank Schebesch Martin Berger Rebecca Fahrig Joachim Hornegger Andreas Maier

In C-arm computed tomography, the field of view (FOV) is often not sufficient to acquire certain anatomical structures, e.g. a full hip or thorax. Recently proposed methods to extend the FOV use a fixed detector displacement and a 360◦ scan range to double the radius of the FOV. These trajectories are designed for circular FOVs. However, there are cases in which the required FOV is not circular...

2016
Hoorieh Bashizadeh Fakhar Mysa Mallahi Mehrdad Panjnoush Pooneh Mohseni Kashani

OBJECTIVES This study aimed to assess the effect of voxel size and object location in the field of view (FOV) on diagnostic accuracy of cone beam computed tomography (CBCT) for detection of simulated bone defects. MATERIALS AND METHODS In this in vitro study, bone defects were drilled in four sections of a dry human mandible. Bone blocks were fixed on a platform parallel to the horizontal pla...

2010
Jigang Wu Xiquan Cui Guoan Zheng Lap Man Lee Changhuei Yang

We have developed a novel microscope technique that can achieve wide field-of-view (FOV) imaging and yet possess resolution that is comparable to conventional microscope. The principle of wide FOV microscope system breaks the link between resolution and FOV magnitude of traditional microscopes. Furthermore, by eliminating bulky optical elements from its design and utilizing holographic optical ...

2009
R. Mirzoyan

Contemporary imaging air Cherenkov telescopes (IACT) for ground-based very high energy (VHE) gamma ray astronomy have prime focus optical design. Typically these telescopes have a (2−4)◦ wide field of view (FoV). They use f/0.7−f/1.2 optics and provide (3−10) ′ resolution in the FoV. Generally, a well designed telescope that includes more than one optical element will offer some advantages not ...

Journal: :EPJ 2022

Optical systems with wide field-of-views (FOV) are crucial for many applications such as high performance imaging, optical projection, augmented/virtual reality, and miniaturized medical imaging tools. Typically, aberration-free a FOV is achieved by stacking multiple refractive lenses (as in “fisheye” lens), adding to the size weight of system. Single metalenses designed have potential replace ...

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