Txoj kev pom vs Brightness
Brightness thiab raug yog ob lub ntsiab lus tseem ceeb tham hauv kev yees duab. Exposure yog qhov ntau npaum li cas ntawm lub teeb uas ib tug yees duab los yog video raug. Brightness yog cov cuab yeej ntawm daim duab kawg uas qhia tias "ci" daim duab zoo li cas. Cov ntsiab lus no tau siv dav hauv kev yees duab, yees duab, astronomy, physics, instrumentation thiab ntau lwm yam. Nws yog qhov tseem ceeb heev kom muaj kev nkag siab zoo hauv cov ntsiab lus no txhawm rau ua kom tau zoo hauv cov haujlwm no. Nyob rau hauv tsab xov xwm no, peb yuav tham txog dab tsi raug thiab brightness yog, lawv cov ntsiab lus, kev siv, kev sib raug zoo ntawm raug thiab brightness, thiab thaum kawg qhov txawv ntawm raug thiab brightness.
Brightness
Brightness yog ib qho tseem ceeb heev uas tau tham txog hauv kev yees duab thiab astronomy. Hauv kev yees duab, ci ntsa iab yog cov nyhuv luminance tsim los ntawm lub teeb los yog lub teeb pom kev. Brightness tau raug txhais raws li lub zog nqa los ntawm electromagnetic nthwv dej los ntawm ib cheeb tsam ib zaug. Brightness yog qhov pom kev pom uas ua rau tus neeg saib xyuas lossis tus saib pom cov duab zoo li ci lossis tsaus. Lub teeb ci lossis lub teeb pom kev zoo yog suav tias yog qhov chaw ci ntsa iab thaum lub teeb absorbing nto yog hu ua tsaus.
Qhov ci ntsa iab feem ntau suav nrog siv RGB nplai. RGB nplai, uas sawv cev rau Liab, Ntsuab, Xiav nplai, yog qhov chaw xim peb sab uas muaj xim twg tuaj yeem suav nrog siv R, G, thiab B qhov tseem ceeb ntawm cov xim. Lub brightness, feem ntau denominated siv lub cim µ yog quantified li, µ=(R + G + B) / 3, qhov twg R, G, thiab B yog qhov sib piv Red, Green, thiab Blue.
Hauv astronomy, ci ntsa iab tau muab faib ua ob hom. Pom meej qhov loj yog qhov ci ntawm lub hnub qub pom los ntawm qhov chaw muab. Qhov loj kawg nkaus yog qhov ci ntawm lub hnub qub pom los ntawm 10 parsecs (32.62 lub teeb xyoo).
Kev tawm
Kev raug mob yog cov cuab yeej sib tham feem ntau hauv kev yees duab. Qib raug ntawm ib daim duab nyob ntawm ntau yam. Lub shutter ceev yog ib qho ntawm cov yam ntxwv uas tswj qhov raug. Slower lub shutter ceev, siab dua yog qhov raug. Aperture loj yog lwm yam kev tswj mechanism uas tswj qhov raug. Loj dua qhov aperture, siab dua yog qhov raug. Lub teeb sab nraud kuj yog qhov tseem ceeb, tab sis nws tsis tuaj yeem tswj tau los ntawm lub koob yees duab tshwj tsis yog siv lub teeb nyem, lossis siv cov reflectors. Tus nqi ISO tsis yog qhov tseem ceeb uas ntsuas qhov raug; Nws yog qhov hloov pauv hloov pauv ntawm lub koob yees duab.
Yog tias lub koob yees duab raug ntau dhau, daim duab tau dhau los, thiab cov ntsiab lus raug ntxuav los ntawm daim duab. Yog hais tias qhov raug tsawg dhau, daim duab yuav underexposed yog li ua rau daim duab tsaus. Kev kho kom zoo rau qhov raug muaj los ntawm kev siv cov nyiaj raug mob.
Dab tsi yog qhov sib txawv ntawm Kev Tshaj Tawm thiab Kev kaj?
• Exposure is the npaum li cas ntawm lub teeb uas tshwm sim ntawm lub sensor nyob rau hauv tus txheej txheem ntawm kev yees duab.
• Brightness yog qhov ci npaum li cas ib yam khoom tshwm hauv daim duab.
• Kev raug yog cov cuab yeej ntawm lub koob yees duab thiab kev teeb tsa; brightness yog ib yam khoom ntawm raug.
