Feem ntau DSLR koob yees duab txhawb JPEG, TIFF, thiab RAW cov duab cov ntaub ntawv tawm tswv yim. Pib lub koob yees duab feem ntau tsuas yog muaj cov ntaub ntawv JPEG. Qee lub koob yees duab DSLR tua hauv JPEG thiab RAW ib txhij. Thaum koj yuav tsis pom ntau lub koob yees duab uas muab TIFF kev yees duab, qee lub koob yees duab siab heev suav nrog hom duab no.
| JPEG | RAW | TIFF |
|---|---|---|
| Siv hom compression. | Tsis compressed lossis ua tiav. | Compression format uas tsis plam info. |
| Txuag qhov chaw cia. | Yuav tsum muaj chaw cia ntau. | Cov ntaub ntawv loj tshaj plaws. |
| Cov hom uas nquag tshaj plaws. | Ntseeg los ntawm cov kws tshaj lij. | Ntau dua hauv kev tshaj tawm cov duab thiab kev kho mob. |
Qhov sib txawv tseem ceeb tshaj plaws ntawm peb hom yog cov ntaub ntawv khaws cia. JPEG poob cov ntaub ntawv feem ntau thaum compression tab sis siv qhov chaw tsawg dua. RAW tsis compress lossis ua cov ntaub ntawv duab, uas txhais tau tias cov ntaub ntawv hauv hom no loj dua. TIFF yog hom compression uas tsis poob cov ntaub ntawv, thiab nws yog qhov loj tshaj plaws ntawm peb hom. Qhov koj xaiv yog nyob ntawm seb cov ntaub ntawv duab koj xav khaws cia, thiab yog tias koj yuav ua tom qab ua koj tus kheej.
JPEG
- hom duab ntau tshaj plaws.
- Siv qhov chaw tsawg dua li RAW thiab TIFF.
- Zoo tshaj rau kev sib koom hauv social media.
- Poob ntaub ntawv thaum compression.
- Editing dluab hauv JPEG txi zoo.
Cov Kws Tshaj Lij Tshaj Lij Sib Koom Tes Pab Pawg cov duab hom siv lossy compression. Hom compression no tshem tawm pixels uas lub compression algorithm pom tias tsis tseem ceeb, yog li txuag chaw cia. Qhov compression tshwm sim nyob rau hauv cov cheeb tsam uas cov xim rov ua dua, xws li hauv daim duab uas pom lub ntuj xiav.
Lub firmware lossis software hauv lub koob yees duab suav cov qib compression thaum lub koob yees duab khaws cov duab. Cov txheej txheem no txuag qhov chaw ntawm daim npav nco. Vim li no, JPEG yog hom ntawv cov duab ntau tshaj plaws thiab muaj txiaj ntsig zoo rau kev nthuav tawm cov duab hauv lub vev xaib, sib qhia cov duab, thiab thauj cov duab mus rau lwm qhov chaw.
Txawm hais tias JPEG qhov compression nta, cov pixels tshem tawm feem ntau tsis pom. Ntxiv rau, koj tuaj yeem tswj tau qhov compression.
Nrog JPEGs, cov duab cov khaubncaws sab nraud povtseg yog flattened. Qhov no txhais tau tias koj tsis tuaj yeem thim rov qab cov kev hloov pauv qub li koj tuaj yeem ua nrog cov duab cov ntaub ntawv tawm tswv yim uas khaws cov kev hloov kho hauv txheej lossis tsis hloov cov ntaub ntawv qub. Dab tsi ntxiv, kho tib JPEG ob peb zaug txuas ntxiv ua rau nws qhov tsis zoo.
Cov kws yees duab feem ntau ua haujlwm hauv JPEG feem ntau ntawm lub sijhawm txij li nws cov qauv duab hauv cov koob yees duab digital, tshwj xeeb tshaj yog pheej yig taw tes thiab tua cov koob yees duab. Lub koob yees duab ntawm lub xov tooj smartphone kuj tseem sau ua JPEG hom ntawv feem ntau. Cov koob yees duab siab dua, xws li DSLRs, kuj tua hauv JPEG. Yog tias koj npaj yuav qhia cov duab thoob plaws hauv social media, siv JPEG vim nws yooj yim dua xa cov ntaub ntawv me dua.
RAW
- Zaj movie zoo.
- Tsis compress lossis ua cov duab ua ntej txuag nws.
- Muab kev tswj koj ntau dua thaum ua tiav cov duab.
- Pib tshwm sim raws li kev xaiv hauv qee lub xov tooj smartphones.
- Yuav tsum muaj chaw cia ntau.
- Tsis sib xws nrog qee cov duab kho thiab saib software.
RAW yog ze rau cov yeeb yaj kiab zoo thiab xav tau ntau qhov chaw cia vim tias lub koob yees duab tsis compress lossis ua cov ntaub ntawv RAW. Qee tus neeg xa mus rau hom ntawv RAW ua qhov tsis zoo digital vim nws tsis hloov dab tsi txog cov ntaub ntawv thaum khaws cia.
Nyob ntawm koj lub tuam txhab lub koob yees duab, RAW yuav raug hu ua lwm yam, xws li NEF (Nikon) lossis DNG. Cov hom ntawv no, thiab lwm yam xws li RW2, CR2, RAF, thiab CRW, zoo ib yam, txawm tias txhua tus siv cov ntaub ntawv sib txawv.
Ob peb lub koob yees duab pib pib tso cai RAW hom ntawv cia. Txawm li cas los xij, qee lub koob yees duab smartphone tau pib muab RAW nrog rau JPEG.
Ntau tus kws tshaj lij thiab cov kws yees duab siab tshaj plaws nyiam RAW vim tias lawv tuaj yeem hloov kho cov duab yam tsis muaj kev txhawj xeeb txog cov ntsiab lus twg cov kev pabcuam compression yuav tshem tawm, xws li JPEG. Piv txwv li, koj tuaj yeem siv cov duab-editing software los hloov qhov dawb tshuav ntawm daim duab tua hauv RAW, tab sis tsuas yog cov metadata hloov pauv xwb, tsis yog daim duab.
Ib qho tsis zoo ntawm kev tua hauv RAW yog qhov loj ntawm qhov chaw cia khoom xav tau, uas yuav ua rau daim npav nco tau sai. Tsis tas li, koj tsis tuaj yeem qhib RAW cov ntaub ntawv nrog qee cov duab kho thiab saib software. Txawm hais tias feem ntau cov duab kho kom zoo nkauj tuaj yeem qhib RAW cov ntaub ntawv, lwm tus uas tau siv dav, zoo li Microsoft Paint, ua tsis tau.
Rau cov laj thawj no, cov kws yees duab thiab cov neeg kho yuav feem ntau tua thiab hloov kho hauv RAW hom thiab xa cov duab mus rau hom compressed xws li JPEG.
TIFF
- Tsis plam cov ntaub ntawv thaum compression.
- Txhawb nqa los ntawm ntau yam kev hloov kho.
- Tsis muaj dav hauv DSLRs.
- Siv qhov chaw cia ntau tshaj tawm ntawm peb hom.
- Cov ntaub ntawv loj dhau rau lub vev xaib.
Tagged Image File Format yog hom compression uas tsis poob cov ntaub ntawv hais txog cov duab cov ntaub ntawv. Nws yog ib hom ntawv lossless. Cov ntaub ntawv hauv hom ntawv no loj dua JPEG thiab RAW cov ntaub ntawv, thiab ob peb lub koob yees duab tsim cov duab hauv TIFF.
TIFF yog ntau hom qauv hauv kev tshaj tawm cov duab kos duab thiab kev kho mob ntau dua li nws nrog kev yees duab digital. Txawm li cas los xij, muaj cov xwm txheej uas cov kws yees duab tshaj lij muaj qhov project uas yuav tsum tau ua.
Ntau yam kev pab cuam txhawb qhib thiab kho cov ntaub ntawv TIFF, tab sis vim tias cov ntaub ntawv no loj heev, lawv tsis siv rau cov duab hauv web thiab feem ntau hloov mus rau lwm hom.
Koj Yuav Xaiv Qhov twg?
Tshwj tsis yog koj yog tus kws yees duab tshaj lij uas yuav ua cov ntawv luam loj, qhov chaw zoo JPEG yuav ua tau raws li koj xav tau. TIFF thiab RAW yog overkill tshwj tsis yog tias koj muaj ib qho laj thawj tshwj xeeb rau kev tua hauv cov hom ntawv, xws li xav tau cov duab kho kom raug.
