Crossword clues for luminance
Douglas Harper's Etymology Dictionary
"luminousness," 1862, from Latin luminantem (nominative luminans), present participle of luminare (see luminary).
Wiktionary
n. 1 the quality of being luminous 2 the luminous flux emitted in a given direction divided by the product of the projected area of the source element perpendicular to the direction and the solid angle containing that direction, i.e. luminous intensity divided by unit area; measured in stilbs or apostilbs
WordNet
n. the quality of being luminous; emitting or reflecting light; "its luminosity is measured relative to that of our sun" [syn: luminosity, brightness, brightness level, luminousness, light]
Wikipedia
Luminance is a photometric measure of the luminous intensity per unit area of light travelling in a given direction. It describes the amount of light that passes through, is emitted or reflected from a particular area, and falls within a given solid angle. The SI unit for luminance is candela per square metre (cd/m). A non-SI term for the same unit is the "nit". The CGS unit of luminance is the stilb, which is equal to one candela per square centimetre or 10 kcd/m.
Luminance is a photometric measure of the density of luminous intensity in a given direction, measured in candela per square metre (cd/m).
Luminance may also refer to:
- Relative luminance, luminance normalized with respect to a reference white
- Luma (video), an approximation of relative luminance, used in video signals
Usage examples of "luminance".
Enticingly, a green luminance tinted a sheaf of ferns, a blue lambency highlighted a rocky prominence.
In front of them, the mountains were picked out in an extraordinary diamond hard and brilliant radiance, strange luminance backlighting the sharp-toothed serrations of their peaks.
One gathered from it that that elusive and distressingly picturesque outlaw, the Saint, had set the Law by the ears again with a new climax of audacities: his name and nom de guerre waltzed through the bald paragraphs of the narrative like a debonair will-o'-the-wisp, carrying with it a breath of buccaneering glamour, a magnificently medieval lawlessness, that shone with a strange luminance through the dull chronicles of an age of dreary news.
The cab crossed Broadway and Seventh Avenue, plunging through the drenched luminance of massed theatre and cinema and cabaret signs like a swimmer diving through a wave, and floated out on the other side in the calmer channel of faintly odorous gloom in which a red neon tube spelt out the legend: "Charley's Place.
The luminance image can be considered to be the product of two other images‚ the reflectance image and the illuminance image.
Then, under a given illuminance, one would observe a distribution of luminance samples such as that shown in figure 24.
The sound had taken five or six seconds to reach them-the Ohio was already over a mile distant on the starboard quarter, but clearly visible still under the luminance of the Northern Lights-the Northern Lights that had betrayed her, almost stopped in the water, to a wandering U-boat.
A streak of yellow light slashed out of the east, and at its tip a fireball exploded, scattering trails of luminance across a quarter of the welkin.
The small arrows in the panels show how the various reflectances are mapped to their corresponding luminances.
The shaded area within the arrows shows how a typical range of reflectances will be mapped into the corresponding range of luminances.
An observer cannot see the reflectances "directly", but rather requires an atmospheric transfer function to convert reflectances to luminances.
The thought came unbeckoned, while shimmering luminance poured in through a nearby window, playing across her face.