Results 11 to 20 of about 138,897 (266)

A Brücke–Bartley effect for contrast [PDF]

open access: yesRoyal Society Open Science, 2018
Accurate derivation of the psychophysical (a.k.a. transducer) function from just-notable differences requires accurate knowledge of the relationship between the mean and variance of apparent intensities.
Joshua A. Solomon   +1 more
doaj   +1 more source

Image Quality for Near-Eye Display Based on Holographic Waveguides

open access: yesApplied Sciences, 2022
The paper analyzes the image quality in augmented reality display based on holographic waveguides. Brightness, brightness non-uniformity, image noise, etc., depend on the parameters of the waveguide substrate, the configuration, and the relief shape of ...
Artem Solomashenko   +4 more
doaj   +1 more source

SVPA - THE SEGMENTATION BASED VISUAL PROCESSING ALGORITHM (SVPA) FOR ILLUSTRATION ENHANCEMENTS IN DIGITAL VIDEO PROCESSING (DVP)

open access: yesICTACT Journal on Image and Video Processing, 2022
At the present time photographic visual processing is rapidly moving towards the next stage. In addition, a variety of visual processing technologies are evolving, such as splitting image dimensions, calibration, pixel beautification, and high-resolution
J Logeshwaran   +3 more
doaj   +1 more source

A Bright IDEA

open access: yesMolecular Systems Biology, 2020
Transcription factors (TFs) control the rate of mRNA production. Technological advances have made the task of measuring mRNA levels for all genes straightforward, but identifying causal relationships between TFs and their target genes remains an unsolved problem in biology.
Christopher Jackson, David Gresham
openaire   +3 more sources

The BRIGHT tool [PDF]

open access: yesAge and Ageing, 2008
the size of the burden of unmet needs of older people living in the community is unknown. We aim to validate a brief postal questionnaire, the Brief Risk Identification of Geriatric Health Tool (BRIGHT) questionnaire, to find cases of older people with disabilities (case-finding) living in the community.community-dwelling patients over the age of 75 ...
Ngaire, Kerse   +4 more
openaire   +2 more sources

Alvejamento químico de caulins Brasileiros: efeito do potencial eletroquímico da polpa e do ajuste do pH

open access: yesQuímica Nova, 2011
Samples of Kaolin from different regions in Brazil were characterized by XRD, SEM and chemical analysis. A chemical bleaching study with pH adjustment was accomplished with the fractions below 37 μm, after classification by screening.
Fernanda Arruda Nogueira Gomes da Silva   +6 more
doaj   +1 more source

Virtual Filter Membranes in a Microfluidic System for Sorting and Separating Size-Based Micro Polystyrene Beads by Illumination Intensity Design in Optically Induced Dielectrophoresis (ODEP)

open access: yesChemosensors, 2022
In biomedical diagnosis, the efficient separation and purification of specific targets from clinical samples is the desired first step. Herein, the concept of virtual filter membranes based on optically-induced dielectrophoresis (ODEP) manipulation in a ...
Chia-Ming Yang   +5 more
doaj   +1 more source

The Brightness of Colour

open access: yesPLoS ONE, 2009
The perception of brightness depends on spatial context: the same stimulus can appear light or dark depending on what surrounds it. A less well-known but equally important contextual phenomenon is that the colour of a stimulus can also alter its brightness. Specifically, stimuli that are more saturated (i.e.
Corney, D   +3 more
openaire   +7 more sources

A Cortical Edge-integration Model of Object-Based Lightness Computation that Explains Effects of Spatial Context and Individual Differences

open access: yesFrontiers in Human Neuroscience, 2014
Previous work demonstrated that perceived surface reflectance (lightness) can be modeled in simple contexts in a quantitatively exact way by assuming that the visual system first extracts information about local, directed steps in log luminance, then ...
Michael E Rudd, Michael E Rudd
doaj   +1 more source

Sonification as a possible stroke rehabilitation strategy

open access: yesFrontiers in Neuroscience, 2014
Despite cerebral stroke being one of the main causes of acquired impairments of motor skills worldwide, well-established therapies to improve motor functions are sparse.
Daniel S. Scholz   +6 more
doaj   +1 more source

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