Results 31 to 40 of about 38,455 (230)

Contour integration across depth

open access: yesVision Research, 1995
In order to investigate the extent of the local connections subserving contour integration across depth, we measured performance for detecting the continuity of a path of Gabor elements distributed in depth and embedded in a three-dimensional field of random background elements.
Hess, Robert F., Field, David J.
openaire   +2 more sources

Modulation of orientation-selective neurons by motion: when additive, when multiplicative?

open access: yesFrontiers in Computational Neuroscience, 2014
The recurrent interaction among orientation-selective neurons in the primary visual cortex (V1) is suited to enhance contours in a noisy visual scene. Motion is known to have a strong pop-up effect in perceiving contours, but how motion-sensitive neurons
Torsten eLüdge   +2 more
doaj   +1 more source

Posterior–Anterior Brain Maturation Reflected in Perceptual, Motor and Cognitive Performance

open access: yesFrontiers in Psychology, 2017
Based on several postmortem morphometric and in vivo imaging studies it has been postulated that brain maturation roughly follows a caudal to rostral direction.
Patrícia Gerván   +7 more
doaj   +1 more source

Context influences contour integration

open access: yesJournal of Vision, 2009
Much research over the last decade has examined how the brain links local activity within primary visual cortex to signal the presence of extended global structure. Here we bring together two themes within this area by addressing how the immediate context that features arise in influences how they are integrated into contours.
Steven C, Dakin, Nina J, Baruch
openaire   +2 more sources

Instability of a Moving Bogie: Analysis of Vibrations and Possibility of Instability in Subcritical Velocity Range

open access: yesVibration
This paper analyzes vibrations induced by a moving bogie passing through a single-layer railway track model. The emphasis is placed on the possibility of unstable behavior in the subcritical velocity range. All results are presented in dimensionless form
Zuzana Dimitrovová
doaj   +1 more source

Brain networks supporting perceptual grouping and contour selection

open access: yesFrontiers in Psychology, 2014
The human visual system groups local elements into global objects seemingly without effort. Using a contour integration task and EEG source level analyses, we tested the hypothesis that perceptual grouping requires a top-down selection, rather than a ...
Gregor eVolberg, Mark W. Greenlee
doaj   +1 more source

Dynamics of contour integration

open access: yesVision Research, 2001
To determine the dynamics of contour integration the temporal properties of the individual contour elements were varied as well as those of the contour they form. A temporal version of a contour integration paradigm (Field, D. J., Hayes, A., & Hess, R. F.
Hess, Robert F.   +2 more
openaire   +2 more sources

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

open access: yesFEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

Contour integration with corners

open access: yesVision Research, 2016
Contour integration refers to the ability of the visual system to bind disjoint local elements into coherent global shapes. In cluttered images containing randomly oriented elements a contour becomes salient when its elements are coaligned with a smooth global trajectory, as described by the Gestalt law of good continuation. Abrupt changes of curvature
Malte, Persike, Günter, Meinhardt
openaire   +2 more sources

Contour Integration for Eigenvector Nonlinearities

open access: yesSIAM Journal on Matrix Analysis and Applications, 2023
24 pages, 6 ...
Claes, Rob   +2 more
openaire   +2 more sources

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