brightness - definição. O que é brightness. Significado, conceito
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O que (quem) é brightness - definição

PERCEPTION OF LIGHT LEVEL
Visual brightness; Brigthness; 🔆; 🔅; Brightness (color)
  • Decreasing brightness with depth (underwater photo as example)

brightness         
n.
1.
Lustre, splendor, brilliancy, radiance, resplendence, effulgence, light, sheen, luminousness, luminosity, shine, glow, blaze, gloss, burnish, gleam, gleaming, beam, beaming, flash, flashing, flame, flaming, sparkle, sparkling.
2.
Clearness, transparency, lucidity, lucency, translucency, limpidity, cloudlessness, uncloudedness.
3.
Acuteness, ingenuity, sagacity, acumen, astuteness, discernment, mother-wit, quick parts.
4.
Cheerfulness, cheeriness, merriment, liveliness, happiness, sprightliness, vivacity, vivaciousness, animation, geniality, lightness.
brightness         
see bright
Brightness         
·noun Acuteness (of the faculties); sharpness 9wit.
II. Brightness ·noun The quality or state of being bright; splendor; luster; brilliancy; clearness.

Wikipédia

Brightness

Brightness is an attribute of visual perception in which a source appears to be radiating or reflecting light. In other words, brightness is the perception elicited by the luminance of a visual target. The perception is not linear to luminance, and relies on the context of the viewing environment (for example, see White's illusion).

Brightness is a subjective sensation of an object being observed and one of the color appearance parameters of many color appearance models, typically denoted as Q {\displaystyle Q} . Brightness refers to how much light appears to shine from something. This is a different perception than lightness, which is how light something appears compared to a similarly lit white object.

The adjective bright derives from an Old English beorht with the same meaning via metathesis giving Middle English briht. The word is from a Common Germanic *berhtaz, ultimately from a PIE root with a closely related meaning, *bhereg- "white, bright". "Brightness" was formerly used as a synonym for the photometric term luminance and (incorrectly) for the radiometric term radiance. As defined by the US Federal Glossary of Telecommunication Terms (FS-1037C), "brightness" should now be used only for non-quantitative references to physiological sensations and perceptions of light. Brightness is an antonym of "wikt:dimness" or "wikt:dullness".

With regard to stars, brightness is quantified as apparent magnitude and absolute magnitude.

The United States Federal Trade Commission (FTC) has assigned an unconventional meaning to brightness when applied to lamps. When appearing on light bulb packages, brightness means luminous flux, while in other contexts it means luminance. Luminous flux is the total amount of light coming from a source, such as a lighting device. Luminance, the original meaning of brightness, is the amount of light per solid angle coming from an area, such as the sky. The table below shows the standard ways of indicating the amount of light.

Exemplos do corpo de texto para brightness
1. In essence, these manners combine light, transparency with brightness.
2. What Smith is prepared to accept is McClaren‘s brightness.
3. It also will measure the brightness of each laser reflection.
4. He said: "This tragic ordeal would have taken her brightness away.
5. Compare that with the star‘s apparent brightness, and you could estimate how far away it was.