Txawm hais tias luam ib daim ntawv lossis xaiv lub koob yees duab digital, ntau tus neeg tsis meej pem txog pes tsawg pixels lawv xav tau nyob hauv tus duab. Qhov tseeb, feem ntau cov SLR cov koob yees duab tau ntes cov duab los ntawm ib qho kev ntsuas ntawm 300 pixels ib nti uas yog ib qho zoo rau ib qho duab uas tau muab rau ib qho luam ntawv. Tseem, muaj ntau tsom rau kev daws teeb meem tshwj xeeb tshaj yog thaum nws tawm mus rau kev lag luam thiab cov tshuab luam ntawv.
Ua ntej, nws tseem ceeb heev kom nkag siab txog ob peb nqe lus uas muaj feem xyuam rau cov duab loj thiab kev daws teeb meem - PPI, DPI, thiab Megapixels. Yog tias koj tsis paub txog cov ntsiab lus no, los yog koj xav tau kev kho dua tshiab, ua raws li cov kev sib txuas hauv qab no kom piav qhia ntxiv:
Pixels ib nti (ppi) - Ib qho kev ntsuas ntawm daim duab daws teeb meem uas qhia txog qhov loj ntawm cov duab yuav luam tawm. Qhov siab tshaj tus nqi ppi, qhov zoo tshaj plaws sau koj yuav tau txais - tab sis tsuas yog mus txog ib qho. 300ppi feem ntau suav tias yog qhov point of diminishing rov qab thaum nws tawm mus rau number case dav hlau ntawm cov duab.
Dots ib nti (dpi) - Kev ntsuas ntawm kev sau ntawv daws teeb meem uas qhia tias pes tsawg tus dots ntawm duav uas muab tso rau ntawm nplooj ntawv thaum luam daim duab. Niaj hnub no tus yees duab zoo ink dav hlau printers muaj dpi kev daws teeb meem hauv txhiab (1200 mus rau 4800 dpi) thiab yuav muab koj yees duab zoo luam tau cov dluab nrog 140-200 ppi daws teeb meem, thiab zoo siab prints cov dluab nrog 200-300 ppi daws teeb meem.
Megapixels (MP) - 1 lab pixels, tab sis tus xov tooj no feem ntau yog sib npaug thaum piav txog cov koob yees duab digital.
Thaum txiav txim siab seb pes tsawg pixels koj xav tau, nws tag nrho khaus cia rau koj yuav siv tus yees duab thiab qhov dav thiab qhov siab ntawm qhov luam. Ntawm no yog ib daim ntawv coj los qhia koj thaum txiav txim seb muaj pes tsawg pixels koj xav tau luam tawm cov duab raws li tus qauv ntawm ib lub tshuab luam ntawv dav hlau los yog los ntawm kev siv online luam ntawv.
5 MP = 2592 x 1944 pixels
Siab Zoo: 10 x 13 nti
Kev Nyuaj Siab: 13 x 19 inches
4 MP = 2272 x 1704 pixels
Siab Zoo: 9 x 12 nti
Tau Zoo Heev Zoo: 12 x 16 nti
3 MP = 2048 x 1536 pixels
Siab Zoo: 8 x 10 nti
Kev Nyab Xeeb Tau Zoo: 10 x 13 nti
2 MP = 1600 x 1200 pixels
Siab Zoo: 4 x 6 nti, 5 x 7 nti
Tau Zoo Heev: 8 x 10 nti
Tsawg dua 2 MP
Tsuas tsim nyog rau qhov kev tshuaj ntsuam saib lossis hnab ntawv me me xwb. Saib: Muaj pes tsawg pixels kuv xav tau kev sib koom duab hauv online?
Ntau tshaj 5 megapixels
Thaum koj tau dhau 5 megapixels lawm, koj yuav tau yog tus kws yees duab siv cov cuab yeej siv high-end, thiab koj yuav tsum tau muaj kev sib txuas ntawm cov ntsiab lus ntawm daim duab loj thiab kev daws teeb meem.
Megapixel Kev Ntseeg
Cov koob yees duab manufacturers xav kom txhua tus neeg tuaj yeem ntseeg tias megapixels ntau dua yog qhov zoo dua, tiam sis raws li koj tau pom los ntawm cov ntawv qhia saum toj no, tshwj tsis yog tias koj muaj ntau hom ntawv luam dav hlau tshuab luam ntawv, txhua yam tshaj 3 megapixels ntau dua li cov neeg feem coob xav tau.
Txawm li cas los xij, muaj ntau zaus thaum megapixels siab dua tuaj yeem ua ke. Ntau dua megapixels muaj peev xwm muab kev xav txog kev ywj pheej rau txoj kev ywj pheej rau qoob loo ntxiv thaum lawv tsis tuaj yeem mus ze rau ib yam kev kawm raws li lawv xav tau. Tab sis cov lag luam tawm mus rau ntau dua megapixels yog cov ntaub ntawv loj dua uas yuav tsum muaj chaw seem hauv koj lub koob yees duab nco thiab chaw zov me nyuam ntxiv hauv koj lub computer. Kuv xav tias tus nqi ntawm cov khoom ntxiv yog tshaj li qhov tsim nyog, tshwj xeeb tshaj yog rau cov sij hawm thaum koj ntes cov duab uas tsis muaj nuj nqis thiab tej zaum koj yuav xav luam tawm rau ntau hom kev kos duab. Nco ntsoov, koj tuaj yeem siv cov kev pabcuam hauv online yog tias koj lub tshuab luam ntawv tsis tuaj yeem ua haujlwm loj.
Ib Lus Ceebtoom
Muaj ntau cov ntaub ntawv uas tau nthuav tawm ntawm no tab sis nws yog qhov tseem ceeb rau koj kom nkag siab tias koj tsuas tsis ntxiv qhov ppi nqi ntawm ib daim duab hauv Photoshop. los ntawm kev nkag mus Duab Yeem> Duab Loj thiab nce cov nqi.
Thawj qhov uas yuav tshwm sim yog qhov kawg ntawm cov ntaub ntawv thiab cov duab qhov ntev yuav ua raws qhov ua rau kev nce vim yog qhov ntau ntawm pixels ntxiv rau daim duab. Qhov teeb meem yog xim cov ntaub ntawv hauv cov pixels tshiab yog, qhov zoo tshaj plaws, qhov "kev xam pom zoo tshaj" rau ntawm lub tshuab ua tsaug rau tus txheej txheem ntawm Interpolation. Yog hais tias tus duab muaj ib qho teeb meem tsawg dua 200 ppi lossis tsawg dua, nws yuav tsum tsis txhob ntaus xovxwm.
Kuj pom: Kuv yuav hloov qhov luaj li cas ntawm daim duab digital?
Kho dua los ntawm ntsuab ntsuab