Results 1 to 10 of about 569,815 (265)

Self-Similarity and Spatial Periodicity in Cerebral Cortical Patterning: Structural Design Notes for Neural Tissue Architects

open access: yesAnatomia, 2023
Tissue engineering is a powerful tool with which to systematically identify the determinants of biological functions. Applied to the design and fabrication of biomimetic brains, tissue engineering serves to disentangle the complex anatomy of neural ...
Nicolas Rouleau, Nirosha J. Murugan
doaj   +1 more source

On the Slow-Time k-Space and its Augmentation in Doppler Radar Tomography

open access: yesSensors, 2020
Doppler Radar Tomography (DRT) relies on spatial diversity from rotational motion of a target rather than spectral diversity from wide bandwidth signals.
Hai-Tan Tran   +2 more
doaj   +1 more source

Acute Alcohol Intake Affects Internal Additive Noise and the Perceptual Template in Visual Perception

open access: yesFrontiers in Neuroscience, 2022
A reduction in visual performance is among the serious consequences of acute alcohol intake. Contrast sensitivity (CS) is a fundamental feature of visual function.
Pan Zhang   +7 more
doaj   +1 more source

Os efeitos da idade na percepção visual de grades senoidais em luminância baixa The effects of age on visual perception of sine-wave gratings at low luminance

open access: yesPsicologia: Reflexão e Crítica, 2006
O objetivo deste trabalho foi investigar a função de sensibilidade ao contraste (FSC) de adultos e idosos (20-23, 30-39, 40-49, 50-59, 60-69 anos) para grades senoidais de 0,25 a 2 cpg em luminância baixa.
Natanael Antonio dos Santos   +4 more
doaj   +1 more source

The Role of Low-Spatial Frequency Components in the Processing of Deceptive Faces: A Study Using Artificial Face Models

open access: yesFrontiers in Psychology, 2019
Interpreting another’s true emotion is important for social communication, even in the face of deceptive facial cues. Because spatial frequency components provide important clues for recognizing facial expressions, we investigated how we use spatial ...
Ken Kihara, Yuji Takeda
doaj   +1 more source

The Role of Spatial Frequency Information in Face Classification by Race

open access: yesFrontiers in Psychology, 2017
It was found that face classification by race is more quickly for other-race than own-race faces (other-race classification advantage, ORCA). Controlling the spatial frequencies of face images, the current study investigated the perceptual processing ...
Guoping Zhang   +4 more
doaj   +1 more source

Search of mode wavelengths in planar waveguides by using Fourier transform of wave equation

open access: yesSemiconductor Physics, Quantum Electronics & Optoelectronics, 2016
The article describes a numerical method based on Fourier transform for studying propagating optical waves in dielectric planar waveguides. The inverse problem to the known direct one in waveguide investigation is proposed, namely a search of light ...
V.M. Fitio
doaj   +1 more source

Effect of spatial waveform on apparent spatial frequency

open access: yesVision Research, 2002
We examined the effect of spatial waveform on the perceived spatial frequency of a grating target. The luminance profile of 0.5 c/ degrees sinusoidal gratings was modified by either compressive or expansive power functions, and was presented alternately with a true sinusoidal grating.
Anderson, Andrew J, Johnson, Chris A
openaire   +2 more sources

Spatial and spatial‐frequency analysis in visual optics [PDF]

open access: yesOphthalmic and Physiological Optics, 2012
Citation information: Westheimer G. Spatial and spatial‐frequency analysis in visual optics. Ophthalmic Physiol Opt 2012, 32 , 271–281. doi: 10.1111/j.1475‐1313.2012.00913.x
openaire   +3 more sources

Spatial frequency and visual discomfort

open access: yesVision Research, 2011
Images created from noise filtered to have an approximately 1/f amplitude spectrum were altered by adding excess energy concentrated at various spatial frequencies. The effects of this manipulation on judgements of visual discomfort were studied. Visual noise with a 1/f amplitude spectrum (typical of natural images) was judged more comfortable than any
Louise OHare, Paul B. Hibbard
openaire   +4 more sources

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