Results 191 to 200 of about 1,094,287 (239)

Quantification of Phosphorylated Tau Protein in Alzheimer's Disease Patients’ Fluids With Electrolyte‐Gated Organic Transistor Biosensors

open access: yesAdvanced Healthcare Materials, EarlyView.
Dementia syndrome affects millions of people in the world, and Alzheimer's disease (AD) is the most common cause. We report the detection of the specific biomarker for AD, p‐tau‐181, from physiological to pathological concentrations in cerebrospinal fluid using an electrolyte‐gated organic transistor biosensor.
Marcello Berto   +10 more
wiley   +1 more source

Color constancy [PDF]

open access: yesVision Research, 2011
A quarter of a century ago, the first systematic behavioral experiments were performed to clarify the nature of color constancy-the effect whereby the perceived color of a surface remains constant despite changes in the spectrum of the illumination.
David H Foster
exaly   +9 more sources

Edge-Based Color Constancy [PDF]

open access: yesIEEE Transactions on Image Processing, 2007
International audienceColor constancy is the ability to measure colors of objects independent of the color of the light source. A well-known color constancy method is based on the gray-world assumption which assumes that the average reflectance of ...
Joost van de Weijer   +2 more
exaly   +9 more sources

Simultaneous color constancy

Journal of the Optical Society of America A: Optics and Image Science, and Vision, 1986
Observers matched patches (simulated Munsell papers) in two simultaneously presented computer-controlled displays, a standard array presented under 6500-K illumination and a test array under 4000 or 10,000 K. Adaptation to the test illuminants was limited. The adjusted patch was surrounded by a single color (annulus display) or by many colors (Mondrian
Adam Reeves
exaly   +3 more sources

Color memory and color constancy

Journal of the Optical Society of America A, 1996
Color constancy is the perceived stability of the color of objects despite changes in the light illuminating them. An object's color is considered constant if the current perceived color is judged to be in accord with the remembered one. Thus the accuracy and precision of color memory are fundamental to understanding this classic problem.
E W, Jin, S K, Shevell
openaire   +2 more sources

Bayesian color constancy

Journal of the Optical Society of America A, 1997
The problem of color constancy may be solved if we can recover the physical properties of illuminants and surfaces from photosensor responses. We consider this problem within the framework of Bayesian decision theory. First, we model the relation among illuminants, surfaces, and photosensor responses.
D H, Brainard, W T, Freeman
openaire   +2 more sources

Recurrent Color Constancy

2017 IEEE International Conference on Computer Vision (ICCV), 2017
We introduce a novel formulation of temporal color constancy which considers multiple frames preceding the frame for which illumination is estimated. We propose an end-to-end trainable recurrent color constancy network – the RCC-Net – which exploits convolutional LSTMs and a simulated sequence to learn compositional representations in space and time ...
Yanlin Qian   +4 more
openaire   +2 more sources

Color constancy at a pixel

Journal of the Optical Society of America A, 2001
In computational terms we can solve the color constancy problem if device red, green, and blue sensor responses, or RGB's, for surfaces seen under an unknown illuminant can be mapped to corresponding RGB's under a known reference light. In recent years almost all authors have argued that this three-dimensional problem is too hard.
Finlayson, Graham D., Hordley, Steven D.
openaire   +3 more sources

Color Constancy in Shadows

Journal of the Optical Society of America, 1958
Because color samples perceived as surfaces or objects tend to look much the same under various viewing conditions, they are said to possess color constancy. The viewing condition chosen for study was an obvious shadow of daylight quality falling on a color sample and part of a surrounding white field; the less the effect of the shadow on the color ...
S M, NEWHALL, R W, BURNHAM, R M, EVANS
openaire   +2 more sources

Integrating Color Constancy Into JPEG2000

IEEE Transactions on Image Processing, 2007
The human visual system is able to perceive colors as approximately constant. This ability is known as color constancy. In contrast, the colors measured by a sensor vary with the type of illuminant used. Color constancy is very important for digital photography and automatic color-based object recognition.
Marc Ebner
exaly   +3 more sources

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