Thaum thaij duab nrog koj lub koob yees duab digital, koj tuaj yeem teeb tsa kom tua ntawm qhov kev daws teeb meem tsim los ua kom tau raws li koj xav tau. Tab sis, koj xav tau dab tsi?
Koj Npaj Yuav Siv Daim Duab Li Cas?
Rau cov duab koj npaj tsuas yog muab faib hauv internet lossis xa hauv e-mail, koj tuaj yeem tua ntawm qhov kev daws teeb meem qis dua. Yog tias koj xav luam daim duab, koj yuav tsum tua ntawm qhov kev daws teeb meem siab dua. Tab sis, yog tias koj tsis paub meej tias koj npaj yuav siv nws li cas, nws yog qhov zoo tshaj los tua cov duab ntawm qhov kev daws teeb meem siab tshaj plaws uas koj muaj nrog koj lub koob yees duab. Txawm hais tias koj txiav txim siab tias koj tsis xav luam cov duab, tej zaum koj yuav xav luam tawm rau lub hlis lossis ib xyoos ntawm txoj kev, yog li kev tua feem ntau ntawm koj cov duab ntawm qhov kev daws teeb meem siab tshaj plaws yog yuav luag txhua qhov kev xaiv zoo tshaj plaws.
Lwm qhov txiaj ntsig rau kev tua ntawm qhov kev daws teeb meem siab tshaj plaws yog tom qab ntawd koj tuaj yeem txiav cov duab mus rau qhov me me yam tsis muaj kev nthuav dav thiab cov duab zoo.
Xaiv lub koob yees duab zoo daws teeb meem
Kev txiav txim siab npaum li cas lub koob yees duab daws teeb meem koj thaum kawg xav tau luam tawm nyob ntawm qhov loj ntawm cov ntawv koj xav ua. Cov lus teev hauv qab no yuav pab koj txiav txim siab txog kev daws teeb meem kom raug.
Ua ntej saib seb qhov kev daws teeb meem cuam tshuam li cas rau cov duab luam tawm qhov ntau thiab tsawg, nws tsim nyog nco ntsoov tias kev daws teeb meem tsis yog ib qho ntawm cov duab zoo thiab luam tawm. Cov xwm txheej no tseem ua lub luag haujlwm tseem ceeb hauv kev txiav txim siab seb koj cov duab digital yuav zoo li cas ntawm lub computer screen thiab ntawm daim ntawv:
- teeb pom kev zoo
- Lens quality
- koob yees duab ruaj khov
- Auto-focus on the proper subject
- Kev kaw nrawm nrawm rau kev txav lossis chaw nyob ruaj khov
- khoom siv huv si
Lwm yam uas ua lub luag haujlwm tseem ceeb hauv cov duab zoo, uas nyob rau hauv lem yuav txiav txim siab loj npaum li cas koj tuaj yeem ua luam tawm, yog lub koob yees duab duab sensor. Raws li txoj cai dav dav, lub koob yees duab nrog cov duab loj dua tuaj yeem tsim cov duab zoo dua piv rau lub koob yees duab nrog cov duab me me, txawm tias muaj pes tsawg megapixels ntawm kev daws teeb meem txhua lub koob yees duab muaj.
Kev paub qhov loj npaum li cas luam koj xav ua kuj tuaj yeem pab koj thaum mus yuav lub koob yees duab digital. Yog tias koj paub tias koj xav ua cov ntawv loj loj txhua lub sijhawm, koj yuav tsum yuav tus qauv uas muaj qhov loj tshaj plaws daws teeb meem. Ntawm qhov tod tes, yog tias koj paub tias koj tsuas xav ua qee lub sijhawm me me, koj tuaj yeem xaiv lub koob yees duab digital uas muaj qhov nruab nrab ntawm kev daws teeb meem, uas yuav txuag tau qee cov nyiaj.
A lub koob yees duab daws teeb meem siv daim ntawv
lub rooj no muab koj lub tswv yim ntawm qhov kev daws teeb meem uas koj xav tau los ua ob qho tib si nruab nrab thiab zoo tshaj plaws. Kev tua ntawm qhov kev daws teeb meem uas tau teev tseg ntawm no tsis tau lees tias koj tuaj yeem ua qhov zoo tshaj plaws luam tawm ntawm qhov loj me uas tau teev tseg, tab sis cov lej tsawg kawg ua rau koj pib taw tes rau kev txiav txim siab ntau thiab tsawg.
| Resolution | Avg. Quality | Nyob zoo Nyob zoo |
|---|---|---|
| 0.5 megapixels | 2x3 in. | NA |
| 3 megapixels | 5x7 in. | 4x6 in. |
| 5 megapixels | 6x8 in. | 5x7 in. |
| 8 megapixels | 8x10 in. | 6x8 in. |
| 12 megapixels | 9x12 in. | 8x10 in. |
| 15 megapixels | 12x15 in. | 10x12 in. |
| 18 megapixels | 13x18 in. | 12x15 in. |
| 20 megapixels | 16x20 in. | 13x18 in. |
| 25+ megapixels | 20x25 in. | 16x20 in. |
Koj kuj tuaj yeem ua raws li cov qauv dav dav los pab txiav txim siab qhov kev daws teeb meem zoo tshaj plaws uas yuav tua rau qhov loj npaum li cas koj xav ua. Cov mis xav tias koj tab tom ua luam tawm ntawm 300 x 300 dots ib nti (dpi), uas yog ib qho kev daws teeb meem rau cov duab zoo. Muab qhov dav thiab qhov siab (hauv ntiv tes) ntawm qhov loj ntawm daim duab koj xav ua los ntawm 300. Tom qab ntawd faib los ntawm ib lab los txiav txim tus naj npawb ntawm megapixels los sau.
Yog li, yog tias koj xav ua 10-los ntawm 13-nti luam tawm, cov qauv los txiav txim siab qhov tsawg kawg nkaus ntawm megapixels yuav zoo li no:
(10 nti300)(13 nti300) / 1 lab=11.7 megapixels
