Cov duab zoo nkauj tsis tsuas yog ua kom pom lub qhov muag, tab sis kuj tseem cia koj txaus siab rau lub yees duab los ntawm kev kos duab pom. Txhawm rau kom pom cov duab uas zoo nkauj heev ntawm qhov screen kom pom zoo nkauj xws li ntawm ntawv, koj yuav tsum paub tias daim duab daws teeb meem zoo li cas.
Daim duab no muaj dab tsi?
Ua ntej koj yuav tsum xam seb qhov kev yees duab yog dab tsi. Cov uas tau tuaj hla kev luam tawm ntawm daim duab ntau dua ib zaug pom tias nws qhov ntev tau qhia los ntawm ob tus lej. Cov naj npawb txhais tau qhov siab thiab qhov dav ntawm cov duab hauv pixels, thiab thaum muab khoo, raws li paub los ntawm kev ua lej, qhov chaw tau txais.
Pixels, nyeg, muaj ntau lub ntsiab lus. Thiab cov duab tsim los ntawm cov dots, txhua tus ntawm nws muaj nws tus kheej xim thiab Hawj txawm. Cov duab ntxiv tshaj, qhov tob dua thiab zoo dua daim duab yuav.
Tus tib neeg pom cov duab los ntawm kev pom. Thiab tsis pom kev muaj qhov tsis xws txawm tias cov neeg noj qab haus huv zoo tshaj. Thiab qhov kev txwv no yog kwv yees li 70 dots rau 1 cm lossis 200 los ntawm 1 nti (raws li nws yog kev coj los qhia kev daws teeb meem). Yog tias muaj ntau cov ntsiab lus nyob hauv ib centimeter, tom qab ntawd tib neeg lub qhov muag yuav pom lawv li txoj kab kev ntseeg.
DPI yog dab tsi?
Nws nyob ntawm txoj kev tuaj yeem pom tsis tau hais tias luam tawm cov ntsiab lus tsim tau. Yuav luag txhua cov lus sau hauv cov ntawv luam tawm tau daws teeb meem ntawm 90 txog 300 dpi. Qhov khi no hu ua dots ib nti lossis DPI kom luv.
DPI muaj nws lub ntsiab lus tsuas yog thaum muab cov duab kos ncaj qha. Cov duab uas nyob hauv lub khoos phis tawj tsis muaj qhov loj me: qhov ntev thiab dav. Thiab raws li tau hais dhau los, ob qhov kev txwv no yog qhov tseem ceeb thaum xam qhov nthuav dav.
Lub luag haujlwm tseem ceeb ntawm kev txuas ntxiv yog ua kom pom daim duab zoo thaum luam ntawv ntawm lub tshuab luam ntawv.
Yuav ua li cas kom thaij tau daim duab zoo?
Txhawm rau npaj cov duab thaij duab rau kev luam ntawv, koj yuav tsum txiav txim siab ua qee qhov hauv kev teeb tsa yees duab. Tus uas tsim kev hloov tsim nyog tshaj yog Photoshop. Tom qab koj qhib daim duab hauv qhov program, mus rau ntu "Duab loj".
Lub qhov rai uas qhib yuav qhia tau peb lub ntsiab: dav, qhov siab thiab daws teeb meem. Thaum koj hloov qhov kev daws teeb meem, qhov siab thiab dav yuav hloov, thiab hloov siab lwm yam. Yog tias koj kos lub thawv tom ntej "Teev hloov", tom qab ntawd koj tuaj yeem kho qhov ntev ntev ntawm nws tus kheej.
Qhov zoo tshaj plaws daws teeb meem rau kev yees duab zoo, uas tau txais kev txhawb nqa los ntawm feem ntau luam ntawv, yog 300dpi. Tab sis cov duab me yuav tsum nyob rau hauv qhov kawg, kev daws teeb meem tsawg dua koj xav tau, thiab rov ua lwm yam. Ua ntej luam tawm cov duab loj, nug txog lub tshuab luam ntawv cov lus tshwj xeeb: cov ntsiab lus tseem ceeb yog PPI (uas txhais tau tias yog qhov kev daws teeb meem siab tshaj plaws) thiab tus naj npawb ntawm cov xim uas siv rau kev luam ntawv. Txhawm rau kom tau txais qhov tseeb DPI ntawm ib lub cuab yeej, faib cov PPI los ntawm cov xim.
