MP Pab Txiav Txim Koob Yees Duab
Raws li koj tab tom nrhiav yuav ib lub koob yees duab, ib qho ntawm feem ntau lub koob yees duab jargon koj yuav pom touted los ntawm tuam ntxhab thiab qhia los ntawm tus muag khoom yog megapixel. Thiab nws ua rau me ntsis kev nkag siab - ntau megapixels ib lub koob yees duab tau muab, nws yuav tsum zoo dua. Txoj cai? Hmoov tsis zoo, qhov no yog qhov twg pib tau taub me ntsis. Mus nyeem ntawv kom teb cov nqe lus nug: Ib lub megapixel zoo li cas?
Txhais MP
Ib tug megapixel, feem ntau shortened rau MP, yog sib npaug 1 lab pixels. Lub pixel yog ib tus neeg ntawm cov duab digital. Tus nab npawb ntawm megapixels txiav txim qhov kev daws teeb meem ntawm cov duab, thiab cov duab digital nrog ntau megapixels tau ntau dua qhov teeb meem. Kev daws teeb meem ntau dua yog cov duab txaus hauv cov duab, raws li nws txhais tau hais tias lub koob yees duab siv ntau pixels los tsim cov duab, uas yuav tsum tso cai rau ntau dua qhov tseeb.
Cov Yam Ntxim Saib Ntxim Ua ntawm Megapixels
Nyob rau lub koob yees duab, cov duab sensor sau cov duab. Ib qho duab sensor yog ib lub computer nti uas ntsuas qhov nyiaj ntawm lub teeb uas tawm los ntawm lub lens thiab ntaus lub nti.
Cov duab sensors muaj me me receptors, uas yog hu ua pixels. Txhua ntawm cov receptors yuav ntsuas lub teeb uas ntaus lub nti, sau cov kev siv ntawm lub teeb. Ib qho duab sensor muaj tsheej plhom cov neeg txais tos, thiab pes tsawg tus neeg txais tos (lossis pixels) txiav txim siab seb muaj pes tsawg tus megapixels uas lub koob yees duab tau teev tseg, kuj hu ua qhov teeb meem.
Tsis txhob tso siab rau MP txwv
Qhov no yog qhov twg tau ib qho kev qhia me ntsis. Thaum nws tseem ceeb vim tias lub koob yees duab nrog 30 megapixels yuav tsum tau yees duab zoo tshaj li lub koob yees duab uas muaj peev xwm teev tau 20 megapixels , nws tsis yog qhov xwm txheej. Qhov loj ntawm lub duab sensor plays lub luag hauj lwm tseem ceeb hauv kev txiav txim siab cov duab zoo ntawm ib lub koob yees duab.
Xav txog nws li no. Ib qho duab loj loj hauv lub cev loj uas muaj 20MP yuav muaj ntau tus neeg lub teeb receptors rau nws, thaum lub teeb duab me me hauv lub cev loj me me uas muaj 30MP yuav muaj lub me me lub teeb reseptors.
Lub teeb pom kev loj dua, lossis pixel, yuav muaj peev xwm ntau tshaj qhov ntsuas nkag mus rau lub lens ntawm qhov chaw tshaj ib lub teeb me me. Vim yog qhov tsis muaj teebmeem hauv kev ntsuas nrog me pixel, koj yuav xaus nrog cov teeb meem ntxiv hauv kev ntsuas, ua rau "suab nrov" hauv daim duab. Suab nrov yog pixels uas tsis tshwm los yog xim xim nyob hauv daim duab.
Ntxiv thiab, thaum twg tus neeg pixels ze zog ua ke, raws li lawv muaj cov duab sensor me, nws tau hais tias cov hluav taws xob cov cim qhia tias cov pixels tsim yuav cuam tshuam nrog txhua lwm yam, uas ua rau qhov ntsuas ntawm lub teeb.
Yog li thaum tus nab npawb ntawm megapixels ib lub koob yees duab tau sau ua si hauv duab zoo, qhov loj me ntawm daim duab sensor plays lub luag hauj lwm loj. Piv txwv, lub Nikon D810 muaj 36 megapixels ntawm kev daws teeb meem, tab sis kuj muaj ib cov duab loj heev sensor, ces nws muaj qhov zoo tshaj plaws ntawm ob lub ntiaj teb.
Hloov ntawm MP Chaw
Cov koob yees duab digital feem ntau qhia koj qhov kev hloov pauv cov nab npawb ntawm megapixels uas tau kaw tseg hauv ib daim duab. Li ntawd, yog hais tias lub koob yees duab siab tshaj plaws yog 20MP, koj tuaj yeem sau tau cov duab uas yog 12MP, 8MP, 6MP, thiab 0.3MP.
Thaum nws feem ntau tsis pom zoo kom kaw cov duab nrog tsawg dua tus megapixels, yog tias koj xav tau kom cov duab digital uas yuav tsum tau siv ntau qhov chaw cia, koj yuav tua ntawm qhov chaw tsawg tshaj plaws, xws li teev ntau dua ntawm megapixels los yog ntawm ib qhov kev daws teeb meem loj dua yuav tsum muaj chaw cia ntau dua.