Cov kev daws teeb meem, kev tshuaj ntsuam, thiab cov duab kos yog ib qhov teeb meem loj thiab ntau tshaj plaws, txawm tias cov neeg tsim kev paub txog. Rau cov tshiab rau desktop publishing , nws muaj peev xwm yuav yooj yim. Ua ntej koj xav tias koj tsis paub txog qhov kev daws teeb meem, xav txog yam koj paub thiab qee yam yooj yim, yooj yim to taub qhov tseeb.
Qhov Kev Tshuam Xyuas Yog Dab Tsi?
Raws li nws raug siv hauv cov duab luam tawm thiab kev tsim, kev daws teeb meem yog hais txog cov dots ntawm cov cwj mem los yog hauv pixels uas tsim tau ib daim duab seb nws yog luam tawm ntawm ntawv los yog tso tawm hauv-kev tshuaj ntsuam. Lub sij hawm DPI (dots ib nti) yog zaum ib lub sij hawm tau paub yog tias koj tau yuav los yog siv ib lub tshuab luam ntawv, ib lub tshuab luam ntawv, los yog digital lub koob yees duab. DPI yog ib qho kev ntsuas ntawm kev daws teeb meem. Kev siv, DPI tsuas hais txog kev daws teeb meem ntawm lub tshuab luam ntawv .
Dots, Pixels los sis Ib yam dab tsi?
Lwm cov npe uas koj yuav ntsib uas hais txog kev daws teeb meem yog PPI ( pixels ib nti ), SPI (kuaj ib nti), thiab LPI (kab ib nti). Muaj ob yam tseem ceeb uas yuav tsum nco ntsoov txog cov ntsiab lus no:
- Txhua lub ntsiab lus yog hais txog lwm hom lossis kev ntsuas ntawm kev daws teeb meem.
- Tsib tsib feem pua lossis ntau dua ntawm lub sij hawm koj ntsib cov ntsiab lus daws teeb meem, lawv yuav raug siv tsis yog, txawm tias tsis pub dhau koj cov duab luam tawm lossis duab software.
Hauv lub sijhawm, koj yuav kawm txog kev txiav txim los ntawm cov ntsiab lus teb uas lub sijhawm daws teeb meem. Nyob rau hauv tsab xov xwm no, peb yuav txiav txim siab los daws qhov teeb meem ua cov lus kom yooj yim. (Txawm li cas los xij, DPI thiab DPI tsis yog cov ntsiab lus zoo rau txhua yam uas tsis yog tso tawm los ntawm lub tshuab luam ntawv.
Muaj ntau npaum li cas?
- Seb puas tau sau rau ntawm daim ntawv lossis tso tawm kom pom ntawm koj lub computer screen, ib daim duab yog ua los ntawm me me me ntsis dots.
- Muaj cov colour dots thiab muaj cov dub dots. Hauv kev dub & dawb printing, qhov loj thiab cov duab ntawm cov dub dots thiab npaum li cas los yog nyob sib nrug sib nrug lawv luam ua lub illusion ntawm ntxoov grey.
- Qhov ntau me ntsis dots uas tau muab siv (txog ntu) dlaim phaj cov duab.
- Cov dots nyob hauv ib daim duab, qhov loj dua qhov loj ntawm cov ntaub ntawv nraaj.
- Kev daws teeb meem yog ntsuas los ntawm pes tsawg ntawm cov dots nyob rau hauv kab rov tav los sis ntsug nti.
- Txhua hom khoom ntaus ntawv ( scanner , digital camera , printer , computer monitor ) muaj ntau qhov teeb meem uas nws muaj peev xwm ua tau thiab tso saib tsis muaj teeb meem ntau npaum li cas hauv daim duab.
Kev Piav Ntawm Cov Cai
Lub tshuab luam ntawv 600 DPI laser tau luam tawm txog 600 tawm ntawm cov ntaub ntawv duab hauv ib nti. Lub tshuab computer saib tau feem ntau yog tso saib tsuas yog 96 (Qhov rai) lossis 72 (Mac) cov duab ntawm cov duab hauv ib nti.
Thaum twg ib daim duab muaj ntau dua dots tshaj li cov zaub ntaus ntawv tuaj yeem txhawb, cov dots yog khib. Lawv nce lub me me ntawv, tab sis tsis zoo rau cov luam ntawv los yog cov duab ntawm daim duab. Qhov kev daws teeb meem yog siab dhau rau qhov khoom siv ntawd.
Ib daim duab luam ntawm ob qho tib si ntawm 300 DPI thiab tom 600 DPI yuav saib tib yam luam tawm ntawm 300 lub tshuab luam ntawv DPI. Cov dots ntawm cov ntaub ntawv yog "muab pov tseg" los ntawm lub tshuab luam ntawv, tiam sis daim duab DPI 600 yuav muaj cov ntaub ntawv loj dua.
Thaum twg daim duab muaj tsawg dua li ntawm cov khoom ntaus ntawv, nws yuav tsis muaj tseeb los yog ntse. Cov duab hauv Web feem ntau yog 96 los yog 72 DPI vim hais tias yog qhov daws teeb meem ntawm feem ntau ntawm cov computer. Yog tias koj sau 72 DPI duab rau ib lub tshuab luam ntawv 600 DPI, nws yuav tsis saib zoo li nws ua rau ntawm lub computer monitor. Lub tshuab luam ntawv tsis muaj txaus txaus cov ntaub ntawv los ua kom pom tseeb, ntse duab. (Txawm li cas los, hnub no cov inkjet home printers ua txoj hauj lwm zoo nkauj ntawm kev ua cov duab qes-tsawg yuav zoo txaus rau ntau lub sijhawm.)
Txuas Dots of Resolution
Thaum koj npaj lawm, delve ntxig rau cov ntsiab lus tsis meej txog qhov twg koj tuaj yeem kawm qhov kev daws teeb meem thiab kev sib raug zoo ntawm DPI, PPI, SPI, thiab LPI raws li kev ntsuas ntawm kev daws teeb meem. Tej zaum koj tseem xav kawm ntxiv txog half-half luam ntawv , uas yog hais txog lub ntsiab lus ntawm kev daws teeb meem.