Results 41 to 50 of about 1,210,014 (249)

Predicting individual contrast sensitivity functions from acuity and letter contrast sensitivity measurements. [PDF]

, 2016
Contrast sensitivity (CS) is widely used as a measure of visual function in both basic research and clinical evaluation. There is conflicting evidence on the extent to which measuring the full contrast sensitivity function (CSF) offers more functionally ...
Davey, Pinakin Gunvant, McCray, Kaydee Lynn, Paronian, Violeta, Seitz, Aaron R, Thurman, Steven M   +4 more
core   +1 more source

Acuity and contrast sensivity of infant vision

Nature, 1974
IF we are to study the development of form and space perception in man, it is necessary to know something of the basic visual capabilities of the developing human infant. There have been a number of investigations of visual acuity in the first few months of life.
Atkinson, J, Braddick, O, Braddick, F
openaire   +4 more sources

Localization accuracy of 6‐second CBCT for lung IGRT with various breathing patterns

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose The 6‐second cone beam computed tomography (CBCT) acquisition of the Ethos HyperSight (Varian Medical Systems, Inc. Palo Alto, CA, USA) on‐board imaging system offers benefits, but could be too fast to accurately capture an average target position in a free‐breathing lung cancer patient. This study aimed to ascertain whether a 6‐second
Jihye Koo, Gage Redler, Vladimir Semenenko, Stephen A. Rosenberg, Emily Keit, Jacqueline M. Andreozzi   +5 more
wiley   +1 more source

Perception of global image contrast involves transparent spatial filtering and the integration and suppression of local contrasts (not RMS contrast) [PDF]

Royal Society Open Science, 2017
When adjusting the contrast setting on a television set, we experience a perceptual change in the global image contrast. But how is that statistic computed?
Tim S. Meese, Daniel H. Baker, Robert J. Summers   +2 more
doaj   +1 more source

Fearful faces have a sensory advantage in the competition for awareness [PDF]

, 2015
Only a subset of visual signals give rise to a conscious percept. Threat signals, such as fearful faces, are particularly salient to human vision.
Adams, W. J., Garner, M., Hedger, N.
core   +2 more sources

A Critical Analysis on Perceptual Contrast and Its Use in Visual Information Analysis and Processing

IEEE Access, 2020
Contrast in visible images is one of the most relevant characteristics of visual signals. Since the pioneering works performed in vision psychology and optics, different definitions have been proposed in the literature.
Azeddine Beghdadi, Muhammad Ali Qureshi, Seyed Ali Amirshahi, Aladine Chetouani, Marius Pedersen   +4 more
doaj   +1 more source

Improved Contrast Sensitivity DVS and its Application to Event-Driven Stereo Vision [PDF]

, 2013
This paper presents a new DVS sensor with one order of magnitude improved contrast sensitivity over previous reported DVSs. This sensor has been applied to a bio-inspired event-based binocular system that performs 3D event-driven reconstruction of a ...
Benosman, Ryad B., Jiménez Fernández, Ángel Francisco, Linares Barranco, Alejandro, Linares Barranco, Bernabé, Park, J., Serrano Gotarredona, María Teresa   +5 more
core  

Challenges in mixed-signal IC design of CNN chips in submicron CMOS [PDF]

, 1998
Summary form only given. The contrast observed between the performance of artificial vision machines and "natural" vision system is due to the inherent parallelism of the former. In particular, the retina combines image sensing and parallel processing to
Domínguez Castro, Rafael, Espejo Meana, Servando Carlos, Rodríguez Vázquez, Ángel Benito   +2 more
core   +1 more source

An Analysis for IDH‐Mutant Grade 4 Astrocytoma Based on WHO CNS 5: Implication of Clinical Practice

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Purpose There is ongoing debate regarding the therapeutic approach and prognosis for IDH‐mutant grade 4 astrocytoma, a newly defined subtype of diffuse glioma in the 2021 WHO classification system for central nervous system tumors (WHO CNS 5). The aim of this study was to explore the clinical outcome and prognosticators for newly diagnosed IDH‐
Xianxin Qiu, Liping Liang, Lingchao Chen, Pengjie Hong, Wanzun Lin, Jiabing Liu, Zhirui Zhou, Wenjia Zhu, Tianqi Wu, Mingyuan Pan, Yihua Zhong, Jing Gao, Zhiyong Qin, Yang Wang   +13 more
wiley   +1 more source

The effect of spatial frequency on peripheral collinear facilitation [PDF]

, 2015
The detection of a Gabor patch (target) can be decreased or improved by the presence of co-oriented Gabor patches (flankers) having the same spatial frequency as the target. These phenomena are thought to be mediated by lateral interactions. Depending on
Andrea Pavan, Banks, Bolz, Brainard, Carpenter, Daniel, Devalois, Freeman, Gelb, Gelb, Gilbert, Gilbert, Gilbert, Giorgi, Graham, Grinvald, Hubel, Kapadia, Lev, Levitt, Malach, Malonek, Maniglia, Marcello Maniglia, Martinez-Conde, Meirovithz, Movshon, Pelli, Polat, Polat, Polat, Polat, Polat, Polat, Polat, Polat, Pooresmaeili, Rovamo, Shani, Tailby, Ts’o, Watson, Watson, Williams, Yves Trotter, Zenger, Zenger-Landolt   +46 more
core   +2 more sources