Autofocus yog undoubtedly ib lub koob yees duab muaj txiaj ntsig zoo hauv ob lub mirrorless thiab xov tooj ntawm tes. Nws xyuas kom meej tias peb cov dluab yog ntse txawm nyob rau hauv tsawg tshaj li zoo tagnrho tej yam kev mob thiab yog li muab zoo heev outputs. Nrog rau kev nce qib ntawm txoj kev loj hlob, Dual Pixel autofocus tau txais cov koob npe nrov hauv smartphones. Cov thev naus laus zis no tau cog lus tias yuav tsom mus sai dua, piv txwv li thaum txhaj tshuaj tiv thaiv lossis hauv qhov chaw qis qis. Tab sis nws ua haujlwm li cas?
Dual Pixel autofocus yog qhov txuas ntxiv ntawm theem-nrhiav tsom, aka PDAF, uas tau nthuav tawm hauv lub koob yees duab smartphone rau xyoo. PDAF yeej siv cov pixels siab ntawm cov duab sensor uas saib sab laug thiab sab xis los xam seb cov duab puas nyob rau hauv tsom. Niaj hnub no, ntau tus neeg siv tso siab rau cov cuab yeej yees duab ntawm lawv lub xov tooj mus rau qhov uas lawv tsis txawm muaj lub koob yees duab classic. Kev tshaib kev nqhis rau cov duab zoo ua rau cov tuam txhab tsim kho tshiab, yog li txawm tias PDAF autofocus thev naus laus zis tsis tau stagnated thiab txuas ntxiv txhim kho. Ntau lub xov tooj niaj hnub no tau pib siv, ntawm lwm yam, ntau txoj kev PDAF, Txhua Pixel tsom lossis laser autofocus.
Koj tuaj yeem txaus siab rau
Raws li twb tau hais lawm, tus thawj coj ntawm Dual Pixel autofocus yog PDAF. Cov tom kawg yog raws li cov duab sib txawv me ntsis tsim los ntawm daim npog sab laug- thiab txoj cai-saib photodiodes ua rau hauv cov duab sensor lub pixels. Los ntawm kev sib piv cov theem sib txawv ntawm cov pixels, qhov xav tau qhov kev ncua deb yog xam. Phase-nrhiav pixels feem ntau suav txog kwv yees li 5-10% ntawm tag nrho cov sensor pixels, thiab siv ntau lub sij hawm tshawb nrhiav pixel khub tuaj yeem ua rau muaj kev ntseeg siab thiab raug ntawm PDAF.
Kev sib txuas ntawm tag nrho cov sensor pixels
Nrog Dual Pixel autofocus, tag nrho cov sensor lub pixels koom nrog hauv cov txheej txheem tsom, qhov twg txhua pixel muab faib ua ob lub photodiodes, ib qho saib rau sab laug thiab sab xis. Cov no tom qab ntawd pab hauv kev suav cov theem sib txawv thiab qhov ua kom pom tseeb, ua rau muaj qhov tseeb thiab nrawm dua piv rau tus qauv PDAF. Thaum thaij duab siv Dual Pixel autofocus, lub processor thawj zaug txheeb xyuas cov ntaub ntawv tsom xam los ntawm txhua lub photodiode ua ntej sib txuas thiab kaw cov cim hauv daim duab tshwm sim.
Samsung daim duab sensor daim duab saum toj no qhia qhov sib txawv ntawm ib txwm PDAF thiab Dual Pixel autofocus technology. Qhov tsuas yog downside yog tias kev siv cov theem me me-nrhiav photodiodes thiab microlenses, uas tseem koom nrog cov txheej txheem tsom, tsis yooj yim lossis pheej yig, uas dhau los ua qhov tseem ceeb rau cov teeb meem siab heev.
Ib qho piv txwv tuaj yeem yog 108Mpx sensor hauv tus qauv Galaxy Lub S22 Ultra, uas tsis siv Dual Pixel thev naus laus zis, thaum lub koob yees duab qis dua 50Mpx hauv cov qauv Galaxy S22a ib Galaxy S22 Plus ua. Ultra's autofocus yog me ntsis zuj zus vim li ntawd, tab sis lub xov tooj lub koob yees duab thib ob twb muaj Dual Pixel autofocus.
Cov duab thaij duab
Txawm hais tias ob lub thev naus laus zis sib koom ua ke sib koom ua ke, Dual Pixel ua tau zoo tshaj PDAF ntawm kev ceev thiab muaj peev xwm ntau dua los tswj xyuas cov ntsiab lus nrawm. Koj yuav txaus siab rau qhov no tshwj xeeb tshaj yog thaum ntes cov kev ua yeeb yam zoo tshaj plaws, tsis hais qhov kev xav ntawm kev ruaj ntseg uas koj tsuas yog yuav tsum tau rub tawm lub koob yees duab sai sai thiab paub tias koj cov duab yuav ntse. Piv txwv li, Huawei P40 khav theeb lub sijhawm tsom mus rau millisecond ua tsaug rau cov thev naus laus zis no.
Koj tuaj yeem txaus siab rau
Nws tseem tsim nyog sau cia tias Samsung siv lub Dual Pixel me ntsis ntxiv nrog Dual Pixel Pro, qhov twg tus neeg photodiodes tau muab faib ua kab pheeb ces kaum, uas coj tau ntau dua qhov nrawm thiab raug, ua tsaug, ntawm lwm yam, rau qhov tseeb tias tsis yog sab xis thiab sab laug xwb. kev taw qhia nkag mus rau cov txheej txheem tsom ntawm no, tab sis kuj yog qhov chaw sab saum toj thiab hauv qab.
Ib qho ntawm qhov tsis txaus ntseeg tseem ceeb ntawm PDAF yog qhov ua tau zoo ntawm lub teeb. Phase detection photodiodes yog ib nrab ntawm pixels, uas ua rau lub suab tsis yooj yim kom tau txais qhov tseeb informace o theem nyob rau hauv tsawg lub teeb. Hauv qhov sib piv, Dual Pixel thev naus laus zis feem ntau daws qhov teeb meem no los ntawm kev ntes cov ntaub ntawv ntau ntxiv los ntawm tag nrho cov sensor. Qhov no smooths tawm suab nrov thiab ua kom ceev autofocus txawm nyob rau hauv ib qho chaw tsaus. Muaj kev txwv ntawm no ib yam nkaus, tab sis qhov no yog qhov kev txhim kho loj tshaj plaws rau autofocus system tam sim no.
Yog tias koj mob siab txog kev yees duab txawb, lub koob yees duab nrog Dual Pixel autofocus thev naus laus zis yuav pab koj kom ntseeg tau tias koj cov duab yeej ib txwm ntse, thiab nws yog qhov tsim nyog xav txog nws qhov muaj lossis tsis tuaj thaum xaiv koj lub xov tooj cov khoom siv lub koob yees duab.
Koj tuaj yeem yuav qhov zoo tshaj plaws photomobiles ntawm no
Mas huh? Saib seb cov duab los ntawm Plus yog dab tsi thiab cov duab ntawm Ultra yog dab tsi. Kuv zoo siab kuv tau tshem ntawm qhov ntxiv. Cov duab plam kev qias neeg. Ultra txhua yam zoo meej. Koj muaj ib tsab xov xwm txog nws dua….
Los yog koj tsuas yog tsis muaj lub qhov muag zoo meej kom pom qhov txawv? Nws yuav yog lub ntsiab lus ntawm kev pom ;-)