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What (who) is photometric$60424$ - definition
SCIENCE OF THE MEASUREMENT OF LIGHT IN TERMS OF PERCEIVED BRIGHTNESS
Photometric quantities; Photometrics
![Photopic (daytime-adapted, black curve) and scotopic [http://www.cvrl.org/database/text/lum/scvl.htm] (darkness-adapted, green curve) luminosity functions. The photopic includes the CIE 1931 standard [http://www.cvrl.org/database/text/cmfs/ciexyz31.htm] (solid), the Judd-Vos 1978 modified data [http://www.cvrl.org/database/text/lum/vljv.htm] (dashed), and the Sharpe, Stockman, Jagla & Jägle 2005 data [http://www.cvrl.org/database/text/lum/ssvl2.htm] (dotted). The horizontal axis is wavelength in nm.](https://commons.wikimedia.org/wiki/Special:FilePath/Luminosity.png?width=200 "Photopic (daytime-adapted, black curve) and scotopic [http://www.cvrl.org/database/text/lum/scvl.htm] (darkness-adapted, green curve) luminosity functions. The photopic includes the CIE 1931 standard [http://www.cvrl.org/database/text/cmfs/ciexyz31.htm] (solid), the Judd-Vos 1978 modified data [http://www.cvrl.org/database/text/lum/vljv.htm] (dashed), and the Sharpe, Stockman, Jagla & Jägle 2005 data [http://www.cvrl.org/database/text/lum/ssvl2.htm] (dotted). The horizontal axis is wavelength in nm.")
Strömgren photometric system
MEDIUM-BAND PHOTOMETRIC SYSTEM
Stromgren photometric system; Strömgren photometry; Strömgren-Crawford photometry; Strömgren-Crawford photometric system; Stromgren-Crawford photometry; Stroemgren photometric system; Stromgren-Crawford photometric system; Stroemgren photometry; Stroemgren-Crawford photometry; Stroemgren-Crawford photometric system; Stromgren photometry; Four-colour photometry; Uvby; Uvby system
The Strömgren photometric system, abbreviated also as uvbyβ or simply uvby, and sometimes referred as Strömgren - Crawford photometric system, is a four-colour medium-passband photometric system plus Hβ (H-beta) filters for determining magnitudes and obtaining spectral classification of stars. Its use was pioneered by the Danish astronomer Bengt Strömgren in 1956 and was extended by his colleague the American astronomer David L.
Photometric stereo
3D IMAGING TECHNIQUE
Shape from Shading; Shape from shading; Photometric Stereo
Photometric stereo is a technique in computer vision for estimating the surface normals of objects by observing that object under different lighting conditions. It is based on the fact that the amount of light reflected by a surface is dependent on the orientation of the surface in relation to the light source and the observer.
Photometric parallax
Photometric parallax method
Photometric parallax is a means to infer the distances of stars using their colours and apparent brightnesses. It was used by the Sloan Digital Sky Survey to discover the Virgo super star cluster.
Wikipedia
Photometry (optics)
Photometry is the science of the measurement of light, in terms of its perceived brightness to the human eye. It is distinct from radiometry, which is the science of measurement of radiant energy (including light) in terms of absolute power. In modern photometry, the radiant power at each wavelength is weighted by a luminosity function that models human brightness sensitivity. Typically, this weighting function is the photopic sensitivity function, although the scotopic function or other functions may also be applied in the same way. The weightings are standardized by the CIE and ISO.
