Ambiri m'mayiko ounikira amadziwa za CRI, yomwe imadziwikanso kuti Index Rendering Index. Kukhoza kufotokozedwa bwino kwambiri ngati muyeso wa kuchuluka kwa mphamvu ya gwero la kuwala koperekedwa kuti liwonetse mitundu ya zinthu zosiyanasiyana mokhulupirika poyerekezera ndi gwero la kuwala kapena lachilengedwe. Kukwera kwa mtengo wa CRI wa gwero la kuwala, m'pamenenso mawonekedwe amtundu wa chinthu choperekedwa ali olondola.
Kuthekera kwa CIE Ra kuneneratu maonekedwe amtundu kwatsutsidwa mokomera miyeso yotengera mitundu yowoneka bwino, monga CIECAM02 ndi CIE metamerism index for simulators masana. CRI sichizindikiro chabwino chogwiritsidwa ntchito powunika magwero a kuwala, makamaka kwa magwero omwe ali pansi pa 5000 kelvin (K). Miyezo yatsopano, monga IES TM-30, imathetsa mavutowa ndipo yayamba kusintha kugwiritsa ntchito CRI pakati pa akatswiri opanga zowunikira. Komabe, CRI idakali yofanana pakati pa zowunikira zapakhomo.
TM30-15 Ili ndi Zigawo Zazikulu zitatu
- Rf: Mofanana ndi CIE Ra (CRI). Imawonetsa kusintha kwamtundu wa 99 CES kuwonetsa mulingo wonse wa kufanana pakati pa gwero loyeserera ndi chowunikira. Miyezo imachokera ku 0 mpaka 100.
- Rg: Yerekezerani malo omwe atsekeredwa ndi ma chromaticity coordinates mu bin iliyonse ya 16 hue kuti awonetse kuchuluka kwa kuchuluka kwazomwe zimayesedwa poyerekeza ndi chowunikira chowunikira. Magulu osalowerera ndale ndi 100, okhala ndi mikhalidwe yokulirapo kuposa 100 yomwe ikuwonetsa kuchuluka kwa machulukitsidwe ndi mikhalidwe yochepera 100 kuwonetsa kuchepa kwa kuchuluka. Kusiyanasiyana kwa zinthu kumakula pamene kukhulupirika kumachepa.
- Chifaniziro cha Rg kuyimira mitundu yomwe yachapidwa kapena yowoneka bwino chifukwa cha gwero la kuwala. Muli ndi Colour Vector Graphic, Colour Saturation Graphic.
Colour Vector Graphic: Imapereka chithunzithunzi cha kusintha kwa mtundu ndi kachulukidwe kutengera mafotokozedwe apakati pamtundu uliwonse wamtundu, mogwirizana ndi zomwe zatchulidwa. Zojambulazo zimapereka chidziwitso chachangu cha momwe mitundu yosiyanasiyana imapangidwira m'njira zosiyanasiyana.
Zithunzi Zokwanira Pamitundu: Zimapereka chithunzithunzi chosavuta cha kusintha kwa kachulukidwe kokha malinga ndi magwiridwe antchito amtundu uliwonse.
CRI VS TM-30-15
| CIE 13.3-1995 (CRI) | Mtengo wa IES TM-30-15 | |
| Chaka Chotulutsidwa | 1965, 1974 (Revision), 1995 | 2015 |
| Mtundu wa Mitundu | CIE 1964 UVW* | CAM02-UCS (CIECAM02) |
| Chiwerengero cha Zitsanzo za Mitundu | 8 wamba (wa Ra) kuphatikiza 6 apadera (a Ris) | 99 |
| Kufalikira kwa Voliyumu yamtundu | Zochepa | Zokwanira ndi zofanana |
| Saturated Zitsanzo | Ayi | inde |
| Zitsanzo Mitundu | Zitsanzo za Munsell zokha (ma pigment ochepa) | Zosiyanasiyana zenizeni zenizeni |
| Chitsanzo cha Spectral Uniformity | Ayi | inde |
| Zowunikira Zowunikira | Ma radiation a Blackbody, CIE D mndandanda | Ma radiation a Blackbody, CIE D mndandanda |
| Kusintha kwa Reference | Pafupi ndi 5000 K | Zosakanikirana pakati pa 4500 K ndi 5500 K |
| Zotulutsa | General index, Ra (fidelity) 6 zizindikiro zapadera, Ri (kukhulupirika) | Fidelity Index, Rf Gamut Index, Rg Zithunzi za Vector/Saturation Graphics 16 ma hue-based fidelity indices 16 ma chroma indices otengera ma hue 1 pakhungu lodziwika bwino la fidelity index 99 kukhulupirika kwamunthu payekha |
| Magawo Osiyanasiyana | Max 100 wopanda malire otsika, makulitsidwe osinthika | 0 mpaka 100, makulitsidwe mosasinthasintha |
Chifukwa chiyani TM30-15 ndiyofunikira?
- CRI imapezeka pa nyali kulikonse lero ndipo sikuchoka pakali pano. IES ikuyembekezerabe mayankho ndipo isintha ku TM30-15 isanalowe m'malo mwa CRI.
- TM30-15 idzagwiritsidwa ntchito pafupipafupi, makamaka pamapulogalamu omwe kutulutsa mitundu kumakhala kofunikira kwambiri (zofotokozera, mashopu ogulitsa, ndi zina).
- Zogwirizana ndi TM30-15, CRI ikhoza kubedwa, chifukwa imangofanizira 9 ndi mitundu 99 TM30-15 ikugwirizana. Chifukwa chake ngati mupanga zotulutsa zamitundu 9yo, mutha kukulitsa chiwongola dzanja chanu popanda kuwongolera mtundu wamagetsi.
Zapadera
- TM-30-15 ndi njira yovomerezeka. Igwiritseni ntchito ndikupereka ndemanga kuti ifike kukhwima.
- Kusankha gwero lowunikira "labwino" kungakhale kovuta komanso kopindulitsa.
Pansipa pali zithunzi zomwe zimafotokoza mwatsatanetsatane kusintha komwe mukusintha ma metric omwe atchulidwa pamwambapa, monga Rf, Rg, ndi CRI, ndi kufananiza kwa ma graph amitundu.
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