brightness


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brightness

(1) The luminous intensity of a light source, defined as candles/cm2.
(2) The intensity of reflection of light, measured in lamberts (one lambert equals 1 lumen/cm2).

brightness

(brīt′nĕs)
1. The perceived brilliance of an image, e.g., its clarity, how light it is (rather than how dark it looks), and the intensity of the light that it emits.
2. In imaging technology, e.g., radiology, the luminous intensity, measured in candelas, of a display monitor's visible emissions. Such brightness is solely a function of the monitor and is not related to the magnitude of exposure of the image receptor.

brightness 

Attribute of visual sensation according to which an area appears to emit more or less light. Syn. luminosity. Note 1: In British recommended practice, the term brightness is now reserved to describe brightness of colour (i.e. the opposite of dullness) as used in the dyeing industry. Note 2: This attribute is the psychosensorial correlate, or nearly so, of the photometric quantity luminance (CIE).
Brightness Acuity Tester (BAT) See glare tester.
brightness constancy See brightness constancy.
brightness enhancement See Brücke-Bartley effect.
References in periodicals archive ?
Luminit Display Brightness Film is non-birefringent and when combined with a diffuser can reduce film stack assembly as well as result in power savings or improved thermal management.
He said if a person uses his phone for over two hours with maximum brightness, the person will have "short-sighted vision, red eyes, eye fatigue, severe dry eye, burning sensation and foreign body sensation, and then corneal lesions, that is, too high screen brightness will hurt the eyes, easy to induce Cataract and retinopathy."
The ambient light sensor detects the light levels around you and adjusts the screen brightness at an optimum point where you can see clearly.
Astronomers are keen to watch for dips in brightness from distant stars because we've learned this is an excellent way to spot exoplanets, or planets that orbit stars other than our own Sun.
The Gift of Brightness program aims to arm selected, less privileged schools in the country with Epson technologies that will help students through their studies and project, along with, to inspire a creative thoughts and become better prepared in the future by understanding how these technologies work.
Sun King Pro 400: Shines at 40X the brightness of kerosene (400 lumens) for 5 hours, with 100 hours at its lowest brightness setting after a single day of charge.
World's first brightness intelligence plus technology
Each projector features 3,300 lumens of brightness and a 13,000:1 contrast ratio, as well as dual HDMI inputs and an easy-access lamp door.
In this paper, discrete model is used to model microwave brightness temperature of row structure smooth soil surface.
Designed to provide small businesses with brightness at low costs, the Epson VS230, VS330 and VS335W deliver high performance, reliability and Epson's simple setup suite, a host of innovative features that enable flexible positioning and rapid setup in any venue.
Multifunctional devices such as tablets, ultrabooks, and even smartphones need high brightness levels and good color rendering without draining the batteries too quickly.