gamma$30825$ - meaning and definition. What is gamma$30825$
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What (who) is gamma$30825$ - definition

TECHNICAL TERM
Gamma characteristic; Video gamma; Gamma Correction; Gamma balance; Gamma compression; Gamma curve; Gamma corrected; Gamma correct; CRT gamma; Camera gamma; LUT gamma; Display gamma; Viewing gamma; Gamma value
  • Characteristic curve of a [[photographic film]]. The slope of its linear section is called the gamma of the film.
  • The effect of gamma correction on an image: The original image was taken to varying powers, showing that powers larger than 1 make the shadows darker, while powers smaller than 1 make dark regions lighter.
  • Gamma correction test image. Only valid at browser zoom = 100%
  • Plot of the [[sRGB]] standard gamma-expansion nonlinearity in red, and its local gamma value (slope in log–log space) in blue. The local gamma rises from 1 to about 2.2.

Gamma ray         
  • Gamma emission spectrum of cobalt-60
  • The total absorption coefficient of aluminium (atomic number 13) for gamma rays, plotted versus gamma energy, and the contributions by the three effects. As is usual, the photoelectric effect is largest at low energies, Compton scattering dominates at intermediate energies, and pair production dominates at high energies.
  • Alpha radiation]] consists of [[helium]] nuclei and is readily stopped by a sheet of paper. [[Beta radiation]], consisting of [[electron]]s or [[positron]]s, is stopped by an aluminium plate, but gamma radiation requires shielding by dense material such as lead or concrete.
  • The red dots show some of the ~500 terrestrial gamma-ray flashes daily detected by the Fermi Gamma-ray Space Telescope through 2010. Credit: NASA/Goddard Space Flight Center.
  • 60}}
  • NASA guide to electromagnetic spectrum showing overlap of frequency between X-rays and gamma rays
  • In practice, gamma ray energies overlap with the range of X-rays, especially in the higher-frequency region referred to as "hard" X-rays. This depiction follows the older convention of distinguishing by wavelength.
  • Image of entire sky in 100 MeV or greater gamma rays as seen by the EGRET instrument aboard the [[CGRO]] spacecraft. Bright spots within the galactic plane are [[pulsar]]s while those above and below the plane are thought to be [[quasar]]s.
  • A [[hypernova]]. Artist's illustration showing the life of a [[massive star]] as [[nuclear fusion]] converts lighter elements into heavier ones. When fusion no longer generates enough pressure to counteract gravity, the star rapidly collapses to form a [[black hole]]. Theoretically, energy may be released during the collapse along the axis of rotation to form a long duration [[gamma-ray burst]].
  • access-date=2011-11-08}}</ref>
  • Fermi's]] Large Area Telescope (LAT).
  • The total absorption coefficient of lead (atomic number 82) for gamma rays, plotted versus gamma energy, and the contributions by the three effects. Here, the photoelectric effect dominates at low energy. Above 5 MeV, pair production starts to dominate.
  • VACIS]] (vehicle and container imaging system)
ELECTROMAGNETIC RADIATION OF HIGH FREQUENCY AND THEREFORE HIGH ENERGY
Gamma-ray; Gamma radiation; Gamma Ray; Gamma decay; Gamma particle; Gamma Radiation; Γ Radaition; Gamma particles; Gamma Rays; Gamma photon; Gamma Rays and their characteristics; Gamma-Ray; Gamma-rays; Gammaray; G Radaition; Gamma Ray Control; Gamma rays; Secondary radiation; Gamma-decay; Γ-ray; Γ-rays; Γ radiation; Gamma-ray source; Gamma-ray production; Gamma ray generation; Gamma ray production; Gamma-ray generation; Gamma emission; Γ ray; Y photons; Γ rays; Gamma-irradidated; Gamma-irradiated
A gamma ray, also known as gamma radiation (symbol γ or \gamma), is a penetrating form of electromagnetic radiation arising from the radioactive decay of atomic nuclei. It consists of the shortest wavelength electromagnetic waves, typically shorter than those of X-rays.
https://en.wikipedia.org/wiki/Gamma_ray
gamma rays         
  • Gamma emission spectrum of cobalt-60
  • The total absorption coefficient of aluminium (atomic number 13) for gamma rays, plotted versus gamma energy, and the contributions by the three effects. As is usual, the photoelectric effect is largest at low energies, Compton scattering dominates at intermediate energies, and pair production dominates at high energies.
  • Alpha radiation]] consists of [[helium]] nuclei and is readily stopped by a sheet of paper. [[Beta radiation]], consisting of [[electron]]s or [[positron]]s, is stopped by an aluminium plate, but gamma radiation requires shielding by dense material such as lead or concrete.
  • The red dots show some of the ~500 terrestrial gamma-ray flashes daily detected by the Fermi Gamma-ray Space Telescope through 2010. Credit: NASA/Goddard Space Flight Center.
  • 60}}
  • NASA guide to electromagnetic spectrum showing overlap of frequency between X-rays and gamma rays
  • In practice, gamma ray energies overlap with the range of X-rays, especially in the higher-frequency region referred to as "hard" X-rays. This depiction follows the older convention of distinguishing by wavelength.
  • Image of entire sky in 100 MeV or greater gamma rays as seen by the EGRET instrument aboard the [[CGRO]] spacecraft. Bright spots within the galactic plane are [[pulsar]]s while those above and below the plane are thought to be [[quasar]]s.
  • A [[hypernova]]. Artist's illustration showing the life of a [[massive star]] as [[nuclear fusion]] converts lighter elements into heavier ones. When fusion no longer generates enough pressure to counteract gravity, the star rapidly collapses to form a [[black hole]]. Theoretically, energy may be released during the collapse along the axis of rotation to form a long duration [[gamma-ray burst]].
  • access-date=2011-11-08}}</ref>
  • Fermi's]] Large Area Telescope (LAT).
  • The total absorption coefficient of lead (atomic number 82) for gamma rays, plotted versus gamma energy, and the contributions by the three effects. Here, the photoelectric effect dominates at low energy. Above 5 MeV, pair production starts to dominate.
  • VACIS]] (vehicle and container imaging system)
ELECTROMAGNETIC RADIATION OF HIGH FREQUENCY AND THEREFORE HIGH ENERGY
Gamma-ray; Gamma radiation; Gamma Ray; Gamma decay; Gamma particle; Gamma Radiation; Γ Radaition; Gamma particles; Gamma Rays; Gamma photon; Gamma Rays and their characteristics; Gamma-Ray; Gamma-rays; Gammaray; G Radaition; Gamma Ray Control; Gamma rays; Secondary radiation; Gamma-decay; Γ-ray; Γ-rays; Γ radiation; Gamma-ray source; Gamma-ray production; Gamma ray generation; Gamma ray production; Gamma-ray generation; Gamma emission; Γ ray; Y photons; Γ rays; Gamma-irradidated; Gamma-irradiated
Gamma rays are a type of electromagnetic radiation that has a shorter wavelength and higher energy than X-rays.
N-PLURAL
gamma rays         
  • Gamma emission spectrum of cobalt-60
  • The total absorption coefficient of aluminium (atomic number 13) for gamma rays, plotted versus gamma energy, and the contributions by the three effects. As is usual, the photoelectric effect is largest at low energies, Compton scattering dominates at intermediate energies, and pair production dominates at high energies.
  • Alpha radiation]] consists of [[helium]] nuclei and is readily stopped by a sheet of paper. [[Beta radiation]], consisting of [[electron]]s or [[positron]]s, is stopped by an aluminium plate, but gamma radiation requires shielding by dense material such as lead or concrete.
  • The red dots show some of the ~500 terrestrial gamma-ray flashes daily detected by the Fermi Gamma-ray Space Telescope through 2010. Credit: NASA/Goddard Space Flight Center.
  • 60}}
  • NASA guide to electromagnetic spectrum showing overlap of frequency between X-rays and gamma rays
  • In practice, gamma ray energies overlap with the range of X-rays, especially in the higher-frequency region referred to as "hard" X-rays. This depiction follows the older convention of distinguishing by wavelength.
  • Image of entire sky in 100 MeV or greater gamma rays as seen by the EGRET instrument aboard the [[CGRO]] spacecraft. Bright spots within the galactic plane are [[pulsar]]s while those above and below the plane are thought to be [[quasar]]s.
  • A [[hypernova]]. Artist's illustration showing the life of a [[massive star]] as [[nuclear fusion]] converts lighter elements into heavier ones. When fusion no longer generates enough pressure to counteract gravity, the star rapidly collapses to form a [[black hole]]. Theoretically, energy may be released during the collapse along the axis of rotation to form a long duration [[gamma-ray burst]].
  • access-date=2011-11-08}}</ref>
  • Fermi's]] Large Area Telescope (LAT).
  • The total absorption coefficient of lead (atomic number 82) for gamma rays, plotted versus gamma energy, and the contributions by the three effects. Here, the photoelectric effect dominates at low energy. Above 5 MeV, pair production starts to dominate.
  • VACIS]] (vehicle and container imaging system)
ELECTROMAGNETIC RADIATION OF HIGH FREQUENCY AND THEREFORE HIGH ENERGY
Gamma-ray; Gamma radiation; Gamma Ray; Gamma decay; Gamma particle; Gamma Radiation; Γ Radaition; Gamma particles; Gamma Rays; Gamma photon; Gamma Rays and their characteristics; Gamma-Ray; Gamma-rays; Gammaray; G Radaition; Gamma Ray Control; Gamma rays; Secondary radiation; Gamma-decay; Γ-ray; Γ-rays; Γ radiation; Gamma-ray source; Gamma-ray production; Gamma ray generation; Gamma ray production; Gamma-ray generation; Gamma emission; Γ ray; Y photons; Γ rays; Gamma-irradidated; Gamma-irradiated
(also gamma radiation)
¦ plural noun penetrating electromagnetic radiation of shorter wavelength than X-rays.

Wikipedia

Gamma correction

Gamma correction or gamma is a nonlinear operation used to encode and decode luminance or tristimulus values in video or still image systems. Gamma correction is, in the simplest cases, defined by the following power-law expression:

V out = A V in γ , {\displaystyle V_{\text{out}}=AV_{\text{in}}^{\gamma },}

where the non-negative real input value V in {\displaystyle V_{\text{in}}} is raised to the power γ {\displaystyle \gamma } and multiplied by the constant A to get the output value V out {\displaystyle V_{\text{out}}} . In the common case of A = 1, inputs and outputs are typically in the range 0–1.

A gamma value γ < 1 {\displaystyle \gamma <1} is sometimes called an encoding gamma, and the process of encoding with this compressive power-law nonlinearity is called gamma compression; conversely a gamma value γ > 1 {\displaystyle \gamma >1} is called a decoding gamma, and the application of the expansive power-law nonlinearity is called gamma expansion.

https://en.wikipedia.org/wiki/Gamma correction
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