Kev Ua Duab Quantimetric: 5 Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:29

(Cov duab saum toj no qhia txog kev sib piv ntawm cov txheej txheem ua cov duab uas twb muaj lawm nrog ua cov duab quantimetric. Nco ntsoov qhov ua tau zoo dua. Sab saum toj daim duab qhia pom cov khoom cuav coj txawv txawv uas los ntawm kev xav tsis raug uas cov duab ntsuas qee yam xws li lub teeb. Hauv qab txoj cai duab qhia tau zoo dua los ntawm kev ua tib yam quantimetrically.)

Hauv Cov Lus Qhia no koj yuav kawm paub yuav ua li cas txhawm rau txhim kho kev ua tau zoo ntawm cov duab pom lossis pom kev pom lub cev los ntawm kev siv lub tswv yim yooj yim heev: Quantimetric duab pom tseeb

Quantimetric duab ua tau zoo heev txhim kho ib qho ntawm cov hauv qab no:

• Muaj cov duab ua xws li duab deblurring;
• Kev kawm tshuab, khoos phis tawj lub zeem muag, thiab kev lees paub tus qauv;
• Hnav lub ntsej muag paub (saib https://wearcam.org/vmp.pdf), AI thiab HI raws qhov pom kev, thiab lwm yam.

Lub tswv yim yooj yim yog los ua kom muaj nuj nqis ua ntej txheej txheem thiab tom qab txheej txheem cov duab, raws li hauv qab no:

1. Nthuav qhov ntau yam ntawm cov duab lossis cov duab;
2. Ua cov duab lossis cov duab zoo li koj ib txwm ua;
3. Nyem qhov ntau yam ntawm cov duab lossis cov duab (piv txwv li tshem tawm qib 1).

Hauv Cov Lus Qhia yav dhau los, Kuv tau qhia qee yam ntawm HDR (High Dynamic Range) kev nkag siab thiab kev paub ntau npaum li cas, piv txwv li linearity, superposition, thiab lwm yam.

Tam sim no cia peb muab cov kev paub no los siv.

Ua cov txheej txheem uas twb muaj lawm uas koj xav siv. Qhov piv txwv kuv yuav qhia yog duab deblurring, tab sis koj kuj tseem tuaj yeem siv nws rau lwm yam ntxiv.

Kauj Ruam 1: Nthuav Tawm Ntau Yam Ntawm Koj Cov Duab lossis Duab

(Cov duab hloov los ntawm "Kev Txhim Kho Duab Zoo", John Wiley thiab Sons Interscience Series, Steve Mann, Kaum Ib Hlis 2001)

Thawj kauj ruam yog nthuav dav ntau yam ntawm cov duab nkag.

Qhov zoo tshaj plaws koj yuav tsum xub txiav txim siab lub koob yees duab lub luag haujlwm, f, thiab tom qab ntawd siv cov lus teb rov qab, f thim rov qab, rau daim duab.

Cov koob yees duab zoo li yog nrawm ntawm ntau yam sib txawv, yog li peb ib txwm xav siv qhov ua haujlwm nthuav dav.

Yog tias koj tsis paub lub luag haujlwm teb, pib los ntawm kev sim qee yam yooj yim xws li thauj cov duab rau hauv kab duab, pov cov kev hloov pauv mus rau hom ntaub ntawv xws li (ntab) lossis (ob npaug), thiab nce txhua tus nqi pixel rau tus lej, xws li, piv txwv li, squaring txhua tus nqi pixel.

Kev xav:

Vim li cas peb thiaj ua li no?

Cov lus teb yog tias feem ntau cov koob yees duab nthuav tawm lawv qhov sib txawv. Yog vim li cas lawv ua qhov no yog tias feem ntau cov xov xwm nthuav tawm nthuav dav ntau yam. Qhov no zoo heev los ntawm kev sib tsoo: tus nqi ntawm lub teeb tawm los ntawm cathode-ray raj TV TV yog kwv yees li sib npaug rau qhov ntsuas hluav taws xob tau nce mus rau qhov piav qhia ntawm 2.22 yog li thaum cov vis dis aus tso tawm hluav taws xob yog ib nrab txoj kev, cov teeb pom kev tawm ntau tsawg dua ib nrab.

Kev tshaj tawm xov xwm tseem yog qhov nthuav dav nthuav dav. Piv txwv li, daim npav grey "nruab nrab" tso tawm 18% ntawm qhov teeb meem tshwm sim (tsis yog 50% ntawm qhov teeb pom kev zoo). Qhov no ntau lub teeb (18%) tau txiav txim siab nyob hauv nruab nrab ntawm cov lus teb. Yog li koj tuaj yeem pom, yog tias peb saib lub teeb ntawm cov zis raws li lub luag haujlwm ntawm kev tawm tswv yim, tso tawm xov xwm coj zoo ib yam li lawv yog cov kab lus qhia tau zoo tshaj plaws uas muaj qhov nthuav dav nthuav dav nthuav dav ua ntej cov lus teb zoo tshaj plaws.

Hauv daim duab saum toj kawg nkaus, saum toj no, koj tuaj yeem pom cov khoom ntim rau hauv kab nrog kab ntawv, thiab nws sib npaug kom muaj tus nthuav dav ua ntej qhov zoo tshaj plaws tso tawm tso tawm.

Txij li cov lus pom muaj qhov nthuav dav, cov koob yees duab yuav tsum tau tsim los ua kom nrawm dua kom cov duab zoo nyob ntawm cov lus uas twb muaj lawm.

Rov qab rau hauv cov hnub qub thaum muaj ntau txhiab tus neeg txais xov tooj cua hauv TV thiab tsuas yog ib lossis ob lub chaw tshaj tawm xov xwm (piv txwv li tsuas yog ib lossis ob lub koob yees duab TV), nws yog qhov kho tau yooj yim dua kom tso lub suab tsis sib haum rau hauv lub koob yees duab dua kom rov qab tau txhua lub TV thiab muab ib qho rau txhua tus neeg txais TV.

Los ntawm kev sib tsoo qhov no kuj pab txo suab nrov. Hauv suab peb hu qhov no "Dolby" ("sib piv") thiab muab khoom plig rau nws. Hauv video nws tau tshwm sim los ntawm kev sib tsoo. Stockham tau hais tias peb yuav tsum coj cov logarithm ntawm cov duab ua ntej ua cov duab, thiab tom qab ntawd siv lub antilog. Dab tsi nws tsis tau paub yog tias feem ntau cov koob yees duab thiab cov lus qhia twb tau ua qhov no los ntawm lub sijhawm. Hloov chaw, qhov kuv tau thov yog tias peb ua qhov tsis sib xws ntawm qhov Stockham tau thov. (Saib "Kev Ua Duab Zoo", John Wiley thiab Sons Interscience Series, nplooj 109-111.)

Hauv daim duab qis dua, koj pom qhov kev tawm tsam homomorphic (quantimetric) cov duab ua, qhov uas peb tau ntxiv cov kauj ruam ntawm kev nthuav dav thiab kev sib zog ntawm qhov sib txawv.

Kauj Ruam 2: Ua Cov Duab, lossis Ua Kom Lub Zeem Muag Computer, Tshuab Kawm, lossis Zoo Li

Kauj ruam thib ob, tom qab nthuav dav dav dav, yog ua cov duab.

Hauv kuv qhov xwm txheej, kuv tsuas yog ua qhov kev txiav txim siab ntawm cov duab, nrog rau qhov ua haujlwm plooj, piv txwv li duab deblurring, raws li tau paub ntau hauv daim duab ua ntej.

Muaj ob pawg dav ntawm cov duab quantimetric pom:

• Pab tib neeg pom;
• Pab tshuab pom.

Yog tias peb tab tom sim pab tib neeg pom (uas yog qhov piv txwv kuv tau qhia ntawm no), peb tseem tsis tau ua tiav: peb yuav tsum tau ua tiav cov txiaj ntsig tau rov qab rau hauv qhov chaw duab.

Yog tias peb tau pab cov tshuab pom (piv txwv li kev lees paub lub ntsej muag), peb tau ua tiav tam sim no (tsis tas yuav mus rau kauj ruam 3).

Kauj Ruam 3: Rov Ntsuas Qhov Sib Txawv Ntawm Qhov tshwm sim

Thaum peb tab tom ua haujlwm nthuav dav ntau yam, peb tau hais tias nyob hauv "lub teeb pom kev" (cov duab thaj tsam).

Thaum kawg ntawm Kauj Ruam 2, peb nyob hauv lub teeb pom kev, thiab peb yuav tsum tau rov qab mus rau qhov chaw duab.

Yog li cov kauj ruam 3 no yog hais txog rov qab mus rau thaj chaw duab.

Txhawm rau ua cov kauj ruam 3, tsuas yog nyem qhov sib txawv ntawm cov txiaj ntsig ntawm Kauj Ruam 2.

Yog tias koj paub lub luag haujlwm ntawm lub koob yees duab, siv nws yooj yim, kom tau txais qhov txiaj ntsig, f (p (q)).

Yog tias koj tsis paub lub luag haujlwm ntawm lub koob yees duab, tsuas yog siv qhov kev kwv yees zoo.

Yog tias koj faib cov duab pixels hauv qib 1, tam sim no yog lub sijhawm los siv cov hauv paus plaub fab ntawm txhua cov duab pixel kom rov qab los rau koj kwv yees hais txog thaj chaw duab.

Kauj Ruam 4: Koj Yuav Xav Sim Lwm Yam Kev Hloov Pauv

Deblurring tsuas yog ib qho ntawm ntau qhov piv txwv ua tau. Xav txog, piv txwv li, kev sib txuas ntawm ntau yam kev nthuav tawm.

Nqa ob daim duab zoo li ob qho uas kuv muaj saum toj no. Ib qho tau noj thaum nruab hnub, thiab lwm qhov thaum hmo ntuj.

Muab lawv ua ib daim duab zoo li yav tsaus ntuj.

Yog tias koj tsuas yog nruab nrab lawv ua ke nws zoo li khib nyiab. Sim koj tus kheej!

Tab sis yog tias koj xub nthuav dav qhov sib txawv ntawm txhua daim duab, tom qab ntawd ntxiv lawv, thiab tom qab ntawd nyem qhov sib txawv ntawm qhov sib npaug, nws zoo nkaus li zoo.

Sib piv cov duab ua haujlwm (ntxiv cov duab) nrog kev ua cov duab quantimetric (nthuav dav, ntxiv, thiab tom qab ntawd zaws).

Koj tuaj yeem rub kuv cov cai thiab ntau yam piv txwv cov ntaub ntawv los ntawm no:

Kauj Ruam 5: Mus Ntxiv Ntxiv: Tam sim no Sim Nrog HDR Duab Sib Koom

(Cov duab saum toj no: HDR vuam lub kaus mom hlau siv cov duab ua kom muaj nuj nqis rau kev ua kom pom tseeb ntxiv. Saib Slashgear 2012 Cuaj hlis 12.)

Hauv kev xaus:

ntes ib daim duab, thiab siv cov theem hauv qab no:

1. nthuav dav ntau yam ntawm cov duab;
2. txheej txheem duab;
3. compress qhov dynamic ntau yam ntawm qhov tshwm sim.

Thiab yog tias koj xav tau qhov txiaj ntsig zoo dua, sim cov hauv qab no:

ntes ntau qhov sib txawv ntawm cov duab nthuav tawm;

1. nthuav dav qhov hloov pauv mus rau hauv lub teeb pom kev zoo, raws li kuv tau qhia yav dhau los ntawm HDR;
2. txheej txheem qhov tshwm sim cov duab quantimetric, q, hauv lub teeb pom kev zoo;
3. compress qhov dynamic ntau yam los ntawm tonemapping.

Muaj kev lom zem thiab thov nyem "Kuv ua nws" thiab tshaj tawm koj cov txiaj ntsig, thiab kuv yuav zoo siab los tawm tswv yim lossis muab qee yam kev pab tsim kho.