Vim Li Cas Koj Yuav Tsum Tau Txais Koj Saib Xyuas
Gamma yog ib lub lag luam nonlinear uas siv rau txoj cai thiab txiav txim siab txog qhov tseem ceeb ntawm qhov tseem ceeb thiab txav imagery. Nws yog siv los txhais tau li cas tus nqi ntawm cov zauv ntawm pixel txog nws cov sij hawm zoo li cas.
Txawm hais tias gamma tsis tshua yooj yim to taub hauv nws txoj kev paub, nws yog qhov tseem ceeb rau cov kev pab txog digital kom nkag siab tias nws siv li cas rau cov duab. Gamma zoo ib yam li cov duab pom hauv lub computer screen.
To taub Gamma hauv Photography
Lub sij hawm gamma muaj feem xyuam hauv cov ntsiab lus yees duab thaum peb xav saib cov duab hauv computer monitors. Lub tswv yim tseem ceeb heev kom paub tseeb (txawm yog nyob ntawm qhov chaw) vim hais tias lub hom phiaj yog ua kom pom cov duab uas zoo nkaus li zoo tau ntawm cov kev ntsuas thiab txheeb xyuas cov xwm txheej.
Muaj peb hom gamma muab kev koom tes hauv digital cov duab:
- Image Gamma - Siv los ntawm cov koob yees duab los sis RAW duab hloov software los hloov cov duab rau hauv compressed file (JPG lossis TIFF).
- Tso Gamma - Siv los ntawm lub computer ntsuas thiab video phaib los kho cov zis ntawm tus duab. Ib cov yeeb yam high gamma yuav tsim cov duab uas tshwm sim ib tsos tsaus tsawv thiab nrog ntau qhov sib txawv.
- System Gamma - Kuj hu ua 'gamma gaming,' yog qhov sawv cev ntawm txhua gamma qhov tseem ceeb uas siv los tso saib cov duab: yeej tseem zoo, cov duab thiab tso ua ke nrog. Piv txwv, tib cov duab saib ntawm ib lub monitor nrog ib qho txawv gamma yuav tsis zoo ib yam vim hais tias qhov 'gaming gaming' sib txawv.
Los ntawm Lub Koob Yees Daws Saib Xyuas: Ua Li Cas Gamma Ua Hauj Lwm
Txhua pixel hauv cov duab digital yog muab tus nqi uas txiav txim siab seb nws qib zoo li cas. Lub computer monitor siv cov kev ntseeg no thaum saib cov duab digital. Txawm li cas los xij, CRT thiab LCD lub computer ntsuas yuav tsum siv cov kev cai no rau hauv txoj kev tsis muaj tseeb, txhais tau hais tias qhov tseem ceeb yuav tsum tau kho ua ntej lawv tshwm.
Ncaj nraim tawm ntawm lub thawv, lub computer monitor feem ntau muaj ib gamma ntawm 2.5. Feem ntau cov niaj hnub DSLR koob yees duab tua nrog xim xim ntawm ob tog sRGB lossis Adobe RGB thiab cov haujlwm no ntawm gamma ntawm 2.2.
Yog tias lub computer screen tsis yog ntsuas kom haum raws li qhov no 2.2 gamma ces cov duab los ntawm ib lub DSLR tuaj yeem saib dhau tsaus nti thiab tsis zoo li cov duab txhaj koob tshuaj tivthaiv hauv thawj qhov chaw!
Vim Li Cas Saib Cov Txheej Txheem Kev Ntsuas Tseem Ceeb?
Rau tag nrho cov laj thawj no tau teeb tsa cov txheej txheem tsim kom pom cov duab ntawm koj tus saib xyuas yuav zoo nkaus li tib tus duab ntawm koj tus neeg nyob ze saib. Cov txheej txheem hu ua calibration thiab nws yog siv los mus tau ib qho kev qhia txog kev loj hlob ntawm gamma uas zoo ib yam li txhua tus neeg saib xyuas hauv lub ntiaj teb.
Tsis muaj tus kws yees duab, txawm tias lawv yog amateur lossis professional, yuav tsum ua hauj lwm nrog cov duab tsis muaj ib tug saib xyuas. Nws yog lub peev nyiaj me me uas yuav xyuas kom txhua daim duab koj qhia hauv online los yog xa mus rau ib qho kev luam duab kom pom zoo li koj xav kom nws ua. Nws tsis zoo kiag li los tsim ib qho duab uas zoo nkaus li zoo nkauj rau koj thiab zoo nkaus li txaus siab rau sawv daws ntxiv!
Koj tuaj yeem siv ntau txoj kev rau koj tus kheej saib, nrog rau kev kho vajtse thiab kev xaiv software.
Qhov nruab nrab ntawm tus neeg siv tshuab computer yuav tsis ua kom lawv saib. Qhov no tuaj yeem tsim teeb meem rau cov kws yees duab sim qhia tawm (los yog muag) lawv cov duab. Txawm li cas los xij, yog tias koj tus saib xyuas yog calibrated, ces koj tau ua qhov zoo tshaj plaws uas koj muaj peev xwm qhia tawm koj cov dluab nyob rau hauv txoj kev zoo tshaj plaws. Qhov zoo tshaj plaws uas koj tuaj yeem ua yog piav qhia rau tus neeg saib xyuas uas pom ib daim duab uas yog 'maub heev' lossis 'dhau lub teeb.'