'''Visual comfort probability''' (VCP), also known as '''Guth visual comfort probability''', is a metric used to rate lighting scenes.
VCP is defined as the percentage of people that will find a certain scene (viewpoint and direction) comfortable with regard to visual glare. <ref>[https://web.archive.org/web/20090503190442/http://tristate.apogee.net/lite/lviscom.asp Visual Comfort and Productivity], tristate.apogee.net; retrieved February 16, 2014 via Wayback Machine</ref><ref>{{cite journal |author=Ward, G.J. |year=1991 |title=RADIANCE Visual Comfort Calculation |journal=Rapport Interne, LESO, EPFL |url=http://floyd.lbl.gov/radiance/refer/Notes/glare.ps}} </ref> It was defined by Sylvester K. Guth in 1963. <ref> {{Cite journal | volume = 58 | issue = 5 | pages = 351–364 | last = Guth | first = SK | title = A method for the evaluation of discomfort glare | journal = Illuminating Engineering | date = 1963 }}</ref><ref>{{cite journal|last=Guth|first=Sylvester K.|date=October 1966|title=Computing Visual Comfort Ratings For a Specific Interior Lighting Installation|journal=Illuminating Engineering|pages=634–642|url=http://www.ies.org/PDF/100Papers/036.pdf}}</ref>
==References==
<references/>
Category:Lighting Category:Architectural lighting design Category:Vision
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