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Xim Gamut Nqi Ntawm Cov Zaub

Xim Gamut Nqi Ntawm Cov Zaub

Dec 06, 2017

Gamut, los yog xim chaw, yog ib txoj kev los encode xim. Nws kuj yog hais txog qhov sib npaug ntawm cov xim uas tsim los ntawm kev siv tshuab, uas sawv cev rau qhov teeb meem tshwj xeeb ntawm cov duab xim uas nthuav qhia cov xim. Tam sim no, hom xim gamut ntau hom lus yog: NTSC, sRGB, Adobe RGB thiab hais txog, thiab peb cov xim gamut no tuaj yeem hloov dua siab tshiab.


SRGB

RGB yog hom lus tshaj plaws uas yog siv xim tshaj plaws tam sim no. Nws yog ib hom ntawv thoob ntiaj teb rau txhua yam hauv computer peripherals, xws li cov duab, luam thiab luam theej duab, tsim los ntawm Microsoft, thiab siv software rau xim. SRGB nruab nrab yog peb yam pigments ntawm standard (s) liab (R), ntsuab (G) thiab xiav (B). Thaum lub sRGB xim gamut nqi 100%, nws qhia tau hais tias cov zaub yuav tso saib tag nrho cov xim sRGB, 96% 98% yog ib qho kev sib tw, uas yog, nruab nrab theem, me dua qhov nqi sRGB, lub zuj zus cov khoom muaj peev xwm.

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Adobe RGB

Tsev kawm ntawv RGB yog ib qho kev paub txog kev tsim xim nrog tsim duab. Nws muaj qhov dav xim dua li sRGB. Nws muaj CMYK xim gamut uas sRGB tsis muaj, thiab muaj ntau qib nplua nuj. Rau cov neeg siv kev tshaj tawm hauv kev luam ntawv, yees duab, tsim thiab lwm yam kev ua haujlwm, peb yuav tsum ua kom zoo xim rau cov duab, yog li nws tsim nyog xaiv Adobe RGB gamut zaub.

NTSC

NTSC xim yog xim txheej txheem ntawm National Television Standards Committee, nws yog ntau dua sRGB xim chaw, formula formula ntawm lawv yog "100% sRGB = 72% NTSC", qhov no txhais tsis tau tias 100% sRGB thiab 72% NTSC xim qhov chaw kom sib tshooj sib tshooj, lawv tsuas yog tib qho chaw. NTSC tsuas yog siv nyob rau hauv cov xim sib luag hauv TV xwb, thiab qee cov xim kws sau xim heev kuj siv nws li xim xim txheem.

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Nyob rau hauv ib lo lus, qhov sib txawv loj gamut hais txog tag nrho lwm gamut uas muaj ntau dua 72% NTSC gamut. Rau cov neeg siv nrog photography thiab lwm tus xav tau kev pab, peb yuav tsum them sai sai rau cov xim gamut txheem ntawm Adobe RGB; NTSC thiab Adobe RGB yog cov nyob ze, thiab qhov txawv ntawm lawv yog ib qho me me. Cov xim ntawm cov zaub yuav txav ze rau qhov tiag scene, thiab yuav tsis muaj kev kub ntxhov ntxiv.