Lub lag luam xov tooj ntawm tes muaj cov qauv nrog lub koob yees duab daws teeb meem loj. Muaj txawm tias pheej yig smartphones nrog sensors nrog ib tug daws teeb meem ntawm 16-20 megapixels. Cov neeg siv khoom tsis paub tab tab tom caum lub koob yees duab "txias" thiab nyiam lub xov tooj nrog lub koob yees duab siab dua. Nws tseem tsis tau paub tias nws poob rau tus neeg ua lag luam thiab cov neeg muag khoom.
Kev tso cai yog dab tsi?
Lub koob yees duab daws teeb meem yog qhov ntsuas uas qhia qhov loj kawg ntawm daim duab. Nws tsuas yog txiav txim siab seb qhov loj npaum li cas cov duab yuav yog, piv txwv li nws qhov dav thiab qhov siab hauv pixels. Tseem ceeb: cov duab zoo tsis hloov. Cov duab yuav tsis zoo, tab sis loj vim yog kev daws teeb meem.
Kev daws teeb meem tsis cuam tshuam qhov zoo. Nws yog tsis yooj yim sua tsis hais qhov no nyob rau hauv cov ntsiab lus ntawm smartphone lub koob yees duab interpolation. Tam sim no koj tuaj yeem ncaj qha mus rau qhov taw tes.
Lub koob yees duab interpolation hauv xov tooj yog dab tsi?
Lub koob yees duab interpolation yog ib qho khoom zoomduab daws teeb meem. Nws yog cov duab, tsis yog qhov loj ntawm matrix. Ntawd yog, nws yog software tshwj xeeb uas cuam tshuam cov duab 8MP rau 13MP lossis ntau dua (lossis tsawg dua).
Hauv qhov piv txwv, lub koob yees duab cuam tshuam zoo li lub iav tsom iav lossis lub tsom iav. Cov khoom siv no nthuav cov duab, tab sis tsis ua kom nws zoo dua lossis nthuav dav dua. Yog li yog tias interpolation tau qhia nyob rau hauv cov yam ntxwv ntawm lub xov tooj, ces qhov tseeb daws teeb meem ntawm lub koob yees duab tej zaum yuav qis dua qhov tshaj tawm. Tsis yog phem los tsis zoo, tsuas yog muaj xwb.
Nws yog dab tsi?
Interpolation tau tsim los ua kom qhov loj ntawm daim duab, tsis muaj dab tsi ntxiv. Tam sim no qhov no yog kev ua yeeb yam los ntawm cov neeg lag luam thiab cov tuam ntxhab uas sim muag cov khoom. Lawv siv cov lej loj los qhia txog kev daws teeb meem ntawm lub xov tooj lub koob yees duab ntawm daim ntawv tshaj tawm kev tshaj tawm thiab muab nws ua qhov zoo lossis qee yam zoo. Tsis tsuas yog qhov kev daws teeb meem nws tus kheej tsis cuam tshuam rau qhov zoo ntawm cov duab, tab sis nws kuj tuaj yeem cuam tshuam.
Li 3-4 xyoo dhau los, ntau lub tuam txhab tau caum tus naj npawb ntawm megapixels thiab ntau txoj hauv kev sim ua rau lawv nkag mus rau hauv lawv lub xov tooj smartphones nrog ntau lub sensors ntau li ntau tau. Qhov no yog li cas smartphones nrog lub koob yees duab nrog ib tug daws teeb meem ntawm 5, 8, 12, 15, 21 megapixels tshwm sim. Nyob rau tib lub sijhawm, lawv tuaj yeem thaij duab zoo li cov xab npum pheej yig tshaj plaws, tab sis cov neeg yuav khoom, tau pom daim ntawv nplaum "18 MP lub koob yees duab", tam sim ntawd xav yuav lub xov tooj ntawd. Nrog lub advent ntawm interpolation, nws tau los ua yooj yim mus muag xws smartphones vim muaj peev xwmartificially ntxiv megapixels rau lub koob yees duab. Tau kawg, qhov zoo ntawm daim duab pib txhim kho lub sijhawm, tab sis twv yuav raug hu tsis yog vim kev daws teeb meem lossis kev cuam tshuam, tab sis vim muaj kev vam meej hauv cov ntsiab lus ntawm sensor thiab software txhim kho.
Technical side
Dab tsi yog lub koob yees duab interpolation hauv xov tooj technically, vim tias tag nrho cov ntawv sau saum toj no tau piav qhia tsuas yog lub tswv yim tseem ceeb?
Nrog kev pab los ntawm software tshwj xeeb, pixels tshiab yog "kos" ntawm daim duab. Piv txwv li, txhawm rau nthuav cov duab los ntawm 2 zaug, ib kab tshiab ntxiv tom qab txhua kab ntawm cov duab pixels. Txhua pixel nyob rau hauv kab tshiab no yog sau nrog ib tug xim. Cov xim puv yog xam los ntawm ib qho tshwj xeeb algorithm. Thawj txoj hauv kev yog sau cov kab tshiab nrog cov xim uas ze tshaj plaws pixels muaj. Cov txiaj ntsig ntawm kev ua haujlwm zoo li no yuav txaus ntshai, tab sis txoj kev no yuav tsum muaj qhov tsawg kawg nkaus ntawm kev ua haujlwm suav.
Feem ntau siv yog lwm txoj kev. Ntawd yog, kab tshiab ntawm pixels tau ntxiv rau cov duab qub. Txhua pixel yog sau nrog ib tug xim, uas, nyob rau hauv lem, yog xam raws li qhov nruab nrab ntawm cov pixels nyob sib ze. Txoj kev no muab cov txiaj ntsig zoo dua tab sis yuav tsum tau suav ntau dua.
Zoo zoo, cov txheej txheem txawb niaj hnub no tau nrawm, thiab hauv kev xyaum tus neeg siv tsis pom tias qhov kev pab cuam kho cov duab li cas, sim ua kom nws qhov loj me.
Muaj ntau ntau txoj kev sib cuam tshuam thiab cov algorithms uas tau txhim kho tas li: kev hloov pauv ntawm cov xim txhim kho, kab ua ntau duayog thiab meej. Nws tsis muaj teeb meem li cas tag nrho cov algorithms no tau tsim. Lub tswv yim heev ntawm lub koob yees duab interpolation yog banal thiab tsis zoo li yuav tau txais hauv paus rau yav tom ntej. Siv interpolation, nws tsis tuaj yeem ua kom cov duab kom ntxaws, ntxiv cov ntsiab lus tshiab, lossis txhim kho nws hauv lwm txoj kev. Tsuas yog hauv cov yeeb yaj kiab xwb daim duab me me qhov muag tsis pom tseeb tom qab siv ob peb lim. Hauv kev xyaum, qhov no ua tsis tau.
Koj puas xav tau kev cuam tshuam?
Ntau tus neeg siv tsis paub nug cov lus nug ntawm cov rooj sib tham sib txawv yuav ua li cas los cuam tshuam lub koob yees duab, ntseeg tias qhov no yuav txhim kho cov duab zoo. Qhov tseeb, kev cuam tshuam tsis yog tsuas yog txhim kho cov duab zoo xwb, tab sis kuj tuaj yeem ua rau nws tsis zoo, vim tias cov pixels tshiab yuav raug ntxiv rau cov duab, thiab vim tsis yog ib txwm suav cov xim rau kev sau, tej zaum yuav muaj qhov tsis meej., graininess nyob rau hauv daim duab. Raws li qhov tshwm sim, qhov zoo poob qis.
Yog li kev sib cuam tshuam hauv xov tooj yog kev lag luam lag luam uas tsis tsim nyog kiag li. Nws tuaj yeem nce tsis tsuas yog kev daws teeb meem ntawm daim duab, tab sis kuj yog tus nqi ntawm lub smartphone nws tus kheej. Tsis txhob poob rau kev dag ntawm cov neeg muag khoom thiab cov chaw tsim khoom.
