Results 41 to 50 of about 49,312 (332)

Involvement of top-down networks in the perception of facial emotions: A magnetoencephalographic investigation

open access: yesNeuroImage, 2020
Conscious perception of the emotional valence of faces has been proposed to involve top-down and bottom-up information processing. Yet, the underlying neuronal mechanisms of these two processes and the implementation of their cooperation is still unclear.
Diljit Singh Kajal   +5 more
doaj   +1 more source

High-frequency neural oscillations and visual processing deficits in schizophrenia [PDF]

open access: yes, 2013
Visual information is fundamental to how we understand our environment, make predictions, and interact with others. Recent research has underscored the importance of visuo-perceptual dysfunctions for cognitive deficits and pathophysiological processes in
Lana, L., Tan, H.-R.M., Uhlhaas, P.J.
core   +3 more sources

High-level effects of masking on perceptual identification

open access: yesVision Research, 2004
The extent to which visual form versus higher-level information is used to identify briefly flashed words is assessed in a perceptual identification task. In this task, a word is briefly flashed, post-masked, and a decision is made between two alternatives.
Sanborn, Adam N   +2 more
openaire   +2 more sources

Exploiting entropy masking in perceptual graphic rendering [PDF]

open access: yesSignal Processing: Image Communication, 2015
Abstract Since the human visual system (HVS) is the ultimate appreciator of most photorealistically rendered images, rendering process can be accelerated by exploiting the properties of the HVS. According to the concept of entropy masking, the HVS is not sensitive to visual distortions in unstructured visual signals.
Dong, Lu   +5 more
openaire   +1 more source

Stimulus-specific mechanisms of visual short-term memory [PDF]

open access: yes, 1991
The retention of spatial information in visual short-term memory was assessed by measuring spatial frequency discrimination thresholds with a two-interval forced-choice task varying the time interval between the two gratings to be compared. The memory of
Asplund, R.   +3 more
core   +1 more source

Color Video JND Model Using Compound Spatial Masking and Structure-Based Temporal Masking

open access: yesIEEE Access, 2020
In order to provide high transmission efficiency and visual quality for the color image/video in internet, effective estimation of its inherent just noticeable distortion (JND) is continuously an important topic.
Kuo-Cheng Liu
doaj   +1 more source

Mental Structures [PDF]

open access: yes, 2020
An ongoing philosophical discussion concerns how various types of mental states fall within broad representational genera—for example, whether perceptual states are “iconic” or “sentential,” “analog” or “digital,” and so on.
Lande, Kevin
core  

Time-locked perceptual fading induced by visual transients [PDF]

open access: yes, 2003
After prolonged fixation, a stationary object placed in the peripheral visual field fades and disappears from our visual awareness, especially at low luminance contrast (the Troxler effect).
Kamitani, Yukiyasu, Kanai, Ryota
core   +2 more sources

Comparison of Two Types of Composite-Opaquer Combinations Masking Ability for Tooth Discoloration without Clinically Visible Opacity [PDF]

open access: yesJournal of Dentistry
Background: A few studies have examined the masking ability of the combined application of opaquer and resin composites on tooth discoloration.Purpose: This study investigated the combined application of opaquer-composite to mask discolored backgrounds ...
Hossein Chalakinia   +5 more
doaj   +1 more source

Frame Theory for Signal Processing in Psychoacoustics

open access: yes, 2016
This review chapter aims to strengthen the link between frame theory and signal processing tasks in psychoacoustics. On the one side, the basic concepts of frame theory are presented and some proofs are provided to explain those concepts in some detail ...
A. Bregman   +74 more
core   +1 more source

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