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Moving relevant merge discussion together (and in chronological order) |
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{{WikiProject Color|class=B|importance=Mid}}
== Oppose merge proposal ==▼
"color rendering capacity" is not documented in any color vision or colorimetric text known to me. search results show three hits for the term: this wiki page, the original 1983 paper by xu he, and an unsigned and unsourced web page whose neologisms suggest a chinese author. ▼
the main problem is that color space is not a volume; its dimensions are incommensurate and its space is not euclidean; for example, the chromaticity area implied by hue differences is roughly twice the area implied by chroma differences. there is no standard way to "count the colors" within a chromaticity plane, and illuminance, not illuminant (assuming the light is broadband), is the main source of colorfulness and lightness contrast in surface colors. (the phrase "one unit luminous flux" is incoherent jargon, and if the intended meaning is one lumen then the color measurement is being done by candlelight.) finally, "color rendering capacity" is indistinguishable from "gamut", already widely established as the *limits* of a color space (which are determinate) rather than its indeterminate *volume*, and algorithms to compare gamuts are in wide use and have many practical applications. ▼
rather than merge, i propose that the "color rendering capacity" page be deleted, as i suspect it is self promotional. no other wiki pages link to it. [[User:Drollere|Drollere]] ([[User talk:Drollere|talk]]) 19:20, 12 February 2020 (UTC)▼
== Obsolete merge proposal ==
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Support (with caveats) - I agree with the commenters from the previous merge suggestion that CRI is usually use to refer to CIE Ra. I suggest that this page (Colour Rendering Index) be broadened to note this fact but refer to the concept of colour rendering indices more broadly, with CIE Ra obviously forming a large part of that. This would open the door for the inclusion of Gamut Area Indices, the Colour Quality Scale, Memory Colour Indices and most importantly (considering its recent rise to prominance IES TM-30-15/18).[[User:Da5nsy|Da5nsy]] ([[User talk:Da5nsy|talk]]) 19:10, 23 August 2019 (UTC)
▲"color rendering capacity" is not documented in any color vision or colorimetric text known to me. search results show three hits for the term: this wiki page, the original 1983 paper by xu he, and an unsigned and unsourced web page whose neologisms suggest a chinese author.
▲the main problem is that color space is not a volume; its dimensions are incommensurate and its space is not euclidean; for example, the chromaticity area implied by hue differences is roughly twice the area implied by chroma differences. there is no standard way to "count the colors" within a chromaticity plane, and illuminance, not illuminant (assuming the light is broadband), is the main source of colorfulness and lightness contrast in surface colors. (the phrase "one unit luminous flux" is incoherent jargon, and if the intended meaning is one lumen then the color measurement is being done by candlelight.) finally, "color rendering capacity" is indistinguishable from "gamut", already widely established as the *limits* of a color space (which are determinate) rather than its indeterminate *volume*, and algorithms to compare gamuts are in wide use and have many practical applications.
▲rather than merge, i propose that the "color rendering capacity" page be deleted, as i suspect it is self promotional. no other wiki pages link to it. [[User:Drollere|Drollere]] ([[User talk:Drollere|talk]]) 19:20, 12 February 2020 (UTC)
== Request: Add still photo to the "Film and video high-CRI LED lighting incompatibility" section. ==
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