Kawm li cas Pixel thiab Interpolation muaj feem xyuam
Thaum koj nce qhov loj ntawm cov duab digital, qee hom kev nkag mus los ntawm qhov chaw thiab nws tuaj yeem cuam tshuam rau qhov zoo ntawm daim duab. Nws yog ib qho tseem ceeb rau kev pab txog kom to taub tias kev sib nkag siab yog dab tsi thiab yuav ua li cas txhim kho nws cov txiaj ntsig.
Interpolation yog dab tsi?
Interpolation yog ib lo lus siv los piav qhia txog ib txoj kev los mus nce qhov pixels hauv duab . Nws yog nquag siv los ua kom tag nrho qhov loj ntawm daim duab.
Ua qhov duab loj me ntsis feem ntau tsis qhia vim tias lub computer xav siv interpolation ntxiv cov ntaub ntawv uas tsis yog tseem muaj. Qhov teebmeem ntawm qhov no yuav txawv raws li hom interpolation siv tab sis, feem ntau, nws tsis zoo.
Raws li lub computer sim los txhais cov ntaub ntawv tshiab yuav tsum tau ntxiv, cov duab tuaj yeem ua ploj zuj zus lossis muaj cov ntsiab lus me me ntawm cov xim lossis cov tone uas zoo li tsis muaj chaw.
Ib co digital koob yees duab (feem ntau kis thiab tua cov koob yees duab thiab xov tooj) siv interpolation los tsim cov ' digital zoom '. Qhov no txhais tau hais tias lub koob yees duab tuaj yeem txeeb tshaj qhov siab tshaj plaws uas tau tso cai los ntawm lub koob yees duab lub lens (hu ua optical zoom). Yog tias siv ib lub koob yees duab, nws yog qhov zoo tshaj plaws rau koj kom txav mus ze rau qhov kev kawm es tsis yog siv lub digital zoom.
Interpolation feem ntau siv nyob rau hauv kev yees duab thaij duab thiab qhov no yog qhov chaw uas tus kws yees duab tiag tiag yuav tsum to taub qhov sib txawv ntawm interpolation.
Zej Zos Zej Zog Sib Pauv
Cov nyob ze cov neeg zej zog tuaj yeem yog siv cov koob yees duab-yees thaum rov xyuas thiab ua kom pom cov duab los mus saib cov ntsiab lus. Nws tsuas ua rau pixels loj, thiab cov xim ntawm ib tug tshiab pixel yog tib yam li qhov ze thawj pixel.
Disadvantage: Nws tsis haum rau kev loj hlob cov duab rau luam raws li nws muaj peev xwm tsim jaggies .
Bilinear Interpolation
Bilinear interpolation yuav siv cov ntaub ntawv los ntawm tus thawj pixel, thiab plaub ntawm lub pixels uas kov nws, los txiav txim siab ntawm cov xim ntawm ib tug tshiab pixel. Nws tsim tawm cov qhab-nees ncaj ncees, tab sis nws txo qhov tsis zoo.
Disadvantage: Cov dluab yuav ua zim zuag.
Bicubic Interpolation
Bicubic interpolation yog cov feem ntau ntawm cov pawg, raws li nws yuav siv cov ntaub ntawv los ntawm tus thawj pixel thiab 16 ib puag ncig pixels los tsim cov xim ntawm ib tug tshiab pixel.
Bicubic tus muab xam yog ntau dua qhov ob txoj kev, thiab nws muaj peev xwm ua tau cov duab zoo-zoo. Bicubic interpolation kuj muaj ob lub kab sib txawv ntawm "Smoother" thiab "Sharper" rau qhov kawg ntawm kev tshwm sim.
Disadvantage: Txawm tias nws yog ib qho ntawm cov kev xaiv zoo, loj dhau ntawm kev dhia loj tuaj yeem txo cov duab zoo.
Fractal Interpolation
Feem ntau yog siv cov pov thawj loj heev, kev kuaj ntawm fractal interpolation los ntawm ntau tshaj pixels tshaj bicubic interpolation. Nws ua cov npoo ntse thiab tsis pom qhov tsawg dua, tiam sis yuav tsum tau siv ntau yam software kom khiav nws. Cov kws luam ntawv feem ntau yog siv cov khoom ntaws ua si ntawm fractal.
Disadvantage: Ntau lub computer software tsis muaj qhov kev xaiv no.