To taub kev nyob hauv Digital Photography
Thaum koj nias lub khawm shutter thiab muab ib daim duab, lub yees duab tsis tsuas yog magically xaus rau ntawm daim npav nco. Cov koob yees duab digital, seb nws yog ib lub qauv lens, ib daim iav ILC , los yog ib lub DSLR, yuav tsum tau mus dhau ntawm cov kauj ruam ua ntej daim duab cia rau hauv daim npav nco. Ib qho ntawm cov khoom tseem ceeb ntawm kev khaws cov duab ntawm lub koob yees duab digital yog daim duab tsis tuaj yeem.
Lub koob yees duab duab tsis cia thaj chaw yog qhov tseem ceeb rau kev txiav txim siab txog kev ua haujlwm ntawm cov koob yees duab, tshwj xeeb tshaj yog thaum koj tau siv hom tshuaj tua kab mob tas mus li. Xav paub ntau ntxiv txog lub koob yees duab ntiag tug thiab yuav ua li cas thiaj ua rau nws feem ntau ntawm kev txhawb nqa koj lub koob thaij duab, kev nyeem ntawv mus ntxiv!
Txhawm yees duab cov ntaub ntawv
Thaum koj nyob nraum zais ib daim duab nrog lub koob yees duab, cov duab sensor raug teeb pom kev zoo, thiab tus sensor ntsuas lub teeb uas tawm txhua pixel ntawm lub sensor. Ib qho duab sensor muaj tsheej plhom pixels (duab reseptor cheeb tsam) - ib 20 megapixel koob yees duab muaj 20 lab Diam duab receptors rau cov duab sensor.
Cov duab sensor pom cov xim thiab siv ntawm lub teeb uas tawm txhua lub pixel. Ib tug duab processor hauv lub koob yees duab converts lub teeb rau hauv cov ntaub ntawv, uas yog ib pawg ntawm cov xov tooj uas lub tshuab siv tau los tsim ib qho duab ntawm ib qho screen zaub. Cov ntaub ntawv no mam li ua tiav hauv lub koob yees duab thiab sau rau hauv daim npav cia. Cov ntaub ntawv nyob rau hauv cov ntaub ntawv duab yog ib yam li lwm lub computer ntaub ntawv uas koj tuaj yeem pom, xws li cov ntaub ntawv ua cov ntaub ntawv lossis daim ntawv khom nqi.
Tsiv cov Ntaub Ntawv Ceev
Yuav kom pab txhim kho cov txheej txheem no, DSLRs thiab lwm cov koob yees duab digital tsis muaj koob yees duab (tsis yoojyim rau kev siv lub cim xeeb, lossis RAM), uas yog lub sijhawm khaws cov ntaub ntawv ua ntej lub koob yees duab kho mob sau rau daim npav nco. Lub koob thaij duab loj cia pub rau ntau cov duab kom tau muab khaws cia rau hauv thaj chaw no, thaum tos kom muab sau rau hauv daim npav nco.
Txawv cov koob yees duab thiab cov cim xeeb txawv nyias muaj nyias sau ntawv ceev, uas txhais tau hais tias lawv muaj peev xwm tshem lub koob yees duab tsis nyob ntawm kev sib txawv. Yog li muaj thaj tsam loj dua nyob rau hauv lub koob yees duab tsis kam, tso cai rau khaws cov duab ntxiv hauv thaj tsam ntawm ntus, uas ua haujlwm zoo dua thaum siv hom tshuaj tua kab nrig (tseem hu ua hom loj tawg). Qhov no hom yog hais txog lub koob yees duab tus muaj peev xwm siv ob peb qho kev txhaj tshuaj tam sim ntawd tom qab ib leeg. Tus nab npawb ntawm cov koob tshuaj uas tau muab coj los yeem nyob ntawm qhov loj ntawm lub koob yees duab qhov tsis tuaj yeem.
Thaum pheej yig cov koob yees duab nrog cov chaw tsis tuaj yeem, feem ntau cov niaj hnub DSLRs no muaj cov buffers loj uas cia koj mus tua thaum cov ntaub ntawv tiav hauv keeb kwm yav dhau. Thawj DSLRs tsis muaj buffers txhua, thiab koj yuav tsum tau tos txhua qhov txhaj tshuaj kom tau ua tiav ua ntej koj tuaj yeem tua dua!
Qhov chaw ntawm Image Tsis
Lub koob yees duab tsis tuaj yeem nyob tau ua ntej lossis tom qab duab ua haujlwm.
- Ua ntej Image Processing tsis. Cov ntaub ntawv RAW ntawm lub sensor yog muab tso ncaj qha rau hauv tsis tuaj. Cov ntaub ntawv no mam li ua tiav thiab sau rau hauv daim card cia nrog ua ke nrog lwm cov dej num. Hauv cov koob thaij duab nrog qhov sib txawv, tsis tas li ntawd, yuav tsis tuaj yeem ua rau kom tsis txhob muaj qhov tsawg dua.
- Tom qab cov duab ua tsis. Cov duab ua tiav thiab muab xa mus rau lawv cov hom ntawv kawg ua ntej yuav muab tso rau hauv qhov tsis tuaj. Vim li no, cov kev txhaj tshuaj uas siv hauv kev tua duab nruam tuaj yeem raug nce los ntawm kev txo cov duab cov duab.
Muaj qee cov DSLRs tam sim no siv "Ntse" no. Txoj kev no muab cov khoom ntawm ob qho tag nrho ua ntej thiab tom qab ntiag tug. Cov ntaub ntawv tsis tau muab khaws cia rau hauv lub koob yees duab tsis kam tso cai rau qhov siab dua "thooj ib feeb" (fps). Lawv mam li ua tiav rau lawv qhov kawg thiab xa rov qab mus rau qhov tsis tuaj. Cov ntaub ntawv tom qab tuaj yeem sau rau daim npav cia tib lub sij hawm thaum cov duab raug ua tiav, yog li tiv thaiv kom txhob muaj teeb meem.