Muaj ntau tshaj rau cov duab sensor dua li cov pixels.
Cov duab sensor hauv ib lub koob yees duab (lossis digital lub koob yees duab) yog dab tsi txo nws hwj lub "digital" rau hauv digital camcorder. Siv yooj yim, ib qho duab sensor transforms lub teeb uas yuav los ntawm koj lub koob yees duab lens thiab hloov nws mus rau hauv lub teeb liab. Tias lub teeb ci digitized tau ua tiav thiab muab cia rau hauv koj lub koob yees duab lub cim xeeb raws li cov ntaub ntawv digital video uas koj tuaj yeem saib tom koj lub computer lossis TV. Tom ntej no mus rau lub lens nws tus kheej, daim duab sensor yog lub caij tseem ceeb uas ua kom zoo video.
Muaj ob lub hom phiaj camcorder duab sensors : CCD (them nqi txuas coupled) thiab CMOS (complementary hlau oxide semiconductor). Ob qho tib si ntawm cov duab sensor technology muaj pua pua txhiab los yog tsheej lab ntawm cov pixels. Xav txog ib lub pixel ua ib lub thoob me me uas ntes cov teeb ci thiab muab nws tso rau hauv qhov hluav taws xob teeb liab.
Yuav ua li cas CMOS & amp; CCD Sensors Sib Txawv
Hauv CCD duab sensor, pixels ntes lub teeb thiab txav mus rau ntawm ntug ntawm tus ntiv tes uas nws tau hloov mus rau hauv lub teeb liab. Hauv CMOS sensor, lub teeb yog hloov dua siab tshiab ntawm tus pixel nws tus kheej - tsis muaj hluav taws xob conveyor siv. Qhov sib txawv me ntsis sib txawv no: vim hais tias lub teeb liab tsis tas yuav raug xa mus rau ntawm ntug nti rau kev hloov dua siab tshiab, ib qho CMOS sensor yuav tsum muaj zog dua khiav lag luam. Qhov ntawd txhais tau hais tias, tag nrho lwm tus neeg sib npaug zos, lub koob yees duab nrog lub CMOS sensor yuav muab roj teeb lub neej zoo dua ib qho nrog CCD. Tau kawg, tej yam khoom yuav luag tsis sib npaug li, yog li tsis txhob xav tias lub Cim Ntsuam Xyuas CMOS muaj lub neej zoo dua lub CCD.
Tau ntau xyoo, CCD duab sensors raug suav hais tias yog cov txuj ci siab tshaj plaws raws li cov duab thiab yees duab zoo. Txawm li cas los xij, CMOS sensors tau ua zoo kawg nyob rau hauv lub tuam tsev thiab tam sim no muaj nyob rau ntawm ntau cov camcorders ntawm txhua theem nqi. Sony, piv txwv li, tam sim no siv lub CMOS sensor nyob rau hauv nws cov top-of-the-kab siab txhais yees duab, lub HDR-XR520V.
Yog li, thaum CMOS thiab CCD duab sensors ua txawv, lawv tsis ua li ntawd nyob rau hauv ib txoj kev uas yuav tsum muaj nuj nqis rau tus neeg siv nruab nrab. Koj yuav tsum tau them tsawg dua rau lub ntsuas cua hauv koj lub koob yees duab thiab ntau xim rau qhov pixel suav thiab lub cev loj ntawm lub sensor.
Pixel suav
Thaum rov los saib xyuas cov koob yees duab, koj yuav pom ntau zaus ob ntawm cov lej uas teev los ntawm lub sensor: ib qho tag nrho cov zauv pixel thiab ib qho pixel suav. Tag nrho cov nyiaj suav hais txog tag nrho cov pixels ntawm tus sensor, tab sis zoo yuav qhia koj pixels coob npaum li cas thaum siv yees duab los yog tseem duab. Li ntawd, xyuam xim rau cov duab pixel zoo thaum tab tom nrhiav kev daws teeb meem ntawm koj lub yees duab.
Pixel suav zoo yog qhov tseem ceeb rau lwm qhov laj thawj: nws yuav pab koj txiav tawm ntawm qee yam kev lag luam. Coj Camcorder A. Nws hais tias nws yuav siv tau 10-megapixel duab (piv txwv li daim duab nrog 10 lab pixels). Tab sis thaum koj saib cov pixels zoo ntawm nws cov duab sensor, koj pom nws tsuas yog ib qho 4-megapixel sensor. Li cas 4-megapixel duab sensor siv yees duab 10-megapixel? Nws tau ua los ntawm tus txheej txheem hu ua interpolation. Raws li txoj cai dav dav, koj yuav tsum txo cov duab uas tsim los ntawm kev sib nkag siab. Xwb, siv cov pixels zoo ntawm lub koob yees duab sensor ua ib qho kev qhia rau kev daws teeb meem ntawm koj cov duab.
Qhov tseem ceeb ntawm duab Image Sensor
Cov pixels ntawm tus duab sensor tsis yog tib qho kev cuam tshuam qhov zoo ntawm cov yees duab yuav raug. Qhov loj me ntawm lub sensor teeb meem zoo li. Ntau cov duab sensors tau ntes ntau lub teeb dua me dua, txawm tias lawv muaj tsawg pixels. Tias 's vim, thaum tsawg dua hauv cov zauv, cov pixels no loj thiab yog li yuav ntes tau ntau lub teeb.
Qhov no yog vim li cas koj yuav pom cov yees duab tshaj tawm tsis tsuas pixels ntawm tus duab sensor, tab sis qhov loj ntawm lub sensor nws tus kheej (feem ntau yog hauv cov zauv ntawm ib nti). Koj nyob nraum zoo muas ib lub koob yees duab nrog ib lub duab loj loj txawm hais tias nws muaj tsawg dua pixels dua ib qho kev sib tw nrog ib tus sensor me thiab ntau pixels.