Ib qho ntawm cov lus nug uas nquag nug txog software software yog yuav ua li cas kom loj hlob ntawm cov duab yam tsis tau qhov muag plooj thiab jagged npoo. Cov neeg siv tshiab feem ntau xav tsis thoob thaum lawv hloov kho cov duab thiab pom tias qhov zoo yog qhov tsis zoo. Cov neeg siv kev paub dhau los paub txog qhov teeb meem.
Yog vim li cas rau qhov degradation yog vim bitmapped lossis raster hom duab raug txwv los ntawm lawv cov pixel daws teeb meem. Thaum koj sim hloov qhov loj ntawm cov duab no, koj lub software yuav tsum tau nce qhov loj ntawm txhua pixel (ua rau cov duab jagged) lossis nws yuav tsum "xav" ntawm txoj hauv kev zoo tshaj plaws ntxiv pixels rau cov duab kom nws loj dua.
Tsis ntev tas los no, tsis muaj ntau txoj hauv kev los txhim kho kev daws teeb meem uas tsis yog siv koj cov software kho kho cov txheej txheem rov ua dua tshiab. Niaj hnub no, peb tau ntsib nrog ntau qhov ua tau zoo dua li yav dhau los. Tau kawg, nws yog qhov zoo tshaj plaws los ntes cov kev daws teeb meem uas koj xav tau los ntawm qhov pib. Yog tias koj muaj kev xaiv rov luam dua cov duab ntawm qhov kev daws teeb meem siab dua, los ntawm txhua txoj kev, koj yuav tsum ua qhov ntawd ua ntej siv cov kev daws teeb meem software. Thiab yog tias koj muaj nyiaj los muab tso rau hauv lub koob yees duab uas muaj peev xwm ua tau siab dua, koj yuav pom tias cov nyiaj siv tau zoo dua yog tias koj yuav tsum muab tso rau hauv software daws teeb meem.
Hais tau hais tias, muaj qee lub sijhawm uas koj yuav tsis muaj lwm txoj kev xaiv dua li siv software.
Resizing vs. Resampling
Feem ntau software tsuas muaj ib qho lus txib rau ob qho tib si resizing thiab resampling. Resizing ib daim duab yuav hloov pauv qhov loj me tsis hloov tag nrho pixel qhov ntev. Raws li qhov kev daws teeb meem tau nce, qhov luam ntawv loj yuav me dua, thiab rov ua dua. Thaum koj nce kev daws teeb meem yam tsis hloov pixel qhov ntev, tsis muaj qhov poob zoo, tab sis koj yuav tsum txi qhov loj me.
Resizing ib daim duab siv resampling, txawm li cas los xij, cuam tshuam txog kev hloov pixel qhov ntev thiab yuav ib txwm qhia txog qhov tsis zoo. Tias yog vim li cas resampling siv cov txheej txheem hu ua interpolation rau qhov loj ntawm daim duab. Cov txheej txheem interpolation kwv yees qhov tseem ceeb ntawm cov pixels software xav tau los tsim raws li cov pixels uas twb muaj lawm hauv daim duab. Kev rov ua dua los ntawm kev sib cuam tshuam ua rau muaj qhov tsis zoo ntawm cov duab hloov pauv loj, tshwj xeeb tshaj yog nyob rau thaj chaw uas muaj cov kab ntse thiab cov xim txawv txawv.
Lwm yam ntawm qhov teeb meem no yog qhov nce ntawm lub xov tooj smartphone, ntsiav tshuaj, thiab kev tsom mus rau cov cuab yeej pixel. Cov khoom siv no muaj ob mus rau peb pixels hauv tib qhov chaw nyob ntawm ib pixel ntawm koj lub computer screen. Hloov cov duab los ntawm koj lub computer mus rau ib lub cuab yeej xav kom koj tsim ntau yam ntawm tib daim duab (e.g. 1X, 2X thiab 3X) kom ntseeg tau tias lawv tso saib kom raug ntawm lub cuab yeej. Puas yog ib qho nce qhov loj ntawm daim duab lossis nce cov pixels?
Kev Sib Koom Tes Sib Koom Tes
Duab kho software feem ntau muaj ob peb txoj hauv kev sib txawv rau kev suav cov pixels tshiab thaum cov duab peb tau ua tiav. Nov yog cov lus piav qhia ntawm peb txoj hauv kev muaj nyob hauv Photoshop. Yog tias koj tsis siv Photoshop, koj lub software tej zaum yuav muaj cov kev xaiv zoo sib xws txawm tias lawv yuav siv cov lus sib txawv me ntsis.
- Bicubic yog qhov qeeb tshaj plaws tab sis tsim qhov kev kwv yees zoo tshaj plaws ntawm cov nqi pixel tshiab.
- Bilinear sai dua bicubic tab sis ua haujlwm tsis zoo. Ob qho tib si bicubic thiab bilinear interpolation ua rau pom qhov muag plooj, tshwj xeeb tshaj yog thaum kev nce qib.
- Nyob ze ze tsis siv kev cuam tshuam. Nws tsuas yog siv tus nqi ntawm cov pixels nyob sib ze thiab ntxiv cov pixels tshiab yam tsis muaj qhov nruab nrab. Qhov no yog thaum koj tau txais cov jaggies lossis ntaiv ntaiv.
Nco ntsoov tias muaj ntau tshaj li peb txoj kev cuam tshuam thiab txawm siv tib txoj kev hauv cov software sib txawv tuaj yeem tsim cov txiaj ntsig sib txawv. Photoshop muaj qhov zoo tshaj plaws bicubic interpolation ntawm lwm yam software uas peb tau muab piv.
Lwm Txoj Kev Sib Koom Tes
Ib ob peb lwm cov duab txhim kho cov duab muaj lwm cov kev ua piv txwv uas thov kom ua tau haujlwm zoo dua li Photoshop txoj kev bicubic. Qee qhov no yog Lanczos, B-spline, thiab Mitchell. Ob peb qhov kev pab cuam uas muab cov kev hloov pauv hloov pauv no yog Qimage Pro, IrfanView (dawb duab browser), thiab Photo Cleaner.
Yog tias koj lub software muab ib qho ntawm cov kev hloov pauv no lossis lwm qhov tsis tau hais txog ntawm no, koj yuav tsum tau sim nrog lawv kom pom qhov twg muab cov txiaj ntsig zoo tshaj rau koj. Tej zaum koj yuav pom tau tias txoj kev sib txawv sib txawv ua rau cov txiaj ntsig zoo dua nyob ntawm cov duab siv.
Stair Interpolation
Qee tus neeg tau pom tias koj tuaj yeem tau txais txiaj ntsig zoo dua thaum kev nce qib los ntawm kev nce cov duab loj hauv ob peb qhov me me es tsis yog ib kauj ruam loj. Cov txheej txheem no yog hu ua stair interpolation. Ib qho txiaj ntsig rau kev siv stair interpolation yog tias nws yuav ua haujlwm ntawm 16-ntsis hom duab thiab nws yuav tsum tsis muaj software ntxiv uas tsis yog tus qauv duab editor, xws li Photoshop.
Lub tswv yim ntawm stair interpolation yog qhov yooj yim: Tsis yog siv cov duab loj hais kom mus ncaj qha los ntawm 100% mus rau 400%, koj yuav siv cov duab loj thiab tsuas yog nce, hais, 110%. Tom qab ntawd koj yuav rov hais dua cov lus txib ntau zaus raws li nws yuav siv mus rau qhov loj koj xav tau. Qhov no tuaj yeem ua rau ntxhov siab yog tias koj lub software tsis muaj qee qhov kev ua haujlwm automation.
Yog tias koj siv Photoshop 5.0 lossis siab dua, koj tuaj yeem yuav Fred Miranda tus stair interpolation txiav txim rau $ 15 US. Koj tseem yuav pom cov ntaub ntawv ntxiv thiab cov duab sib piv. Txij li thaum tsab xov xwm no tau sau thaum xub thawj, cov tshiab resampling algorithms thiab software technologies tau raug tsim tawm uas ua rau stair interpolation tseem ceeb tsis siv.
Ntshav Fractals
LizardTech's Genuine Fractals software (yav tas los los ntawm Altamira Group) sim ua txhaum los ntawm cov duab daws teeb meem nrog nws qhov khoom plig-yeej daws teeb meem-ntawm-kev xav tau thev naus laus zis. Qhov tseeb Fractals muaj rau Windows thiab Macintosh. Nws ua hauj lwm raws li ib tug plug-in rau Photoshop thiab lwm yam Photoshop plug-in tshaj cov duab editors. Nrog nws, koj tuaj yeem nkag mus rau cov ntaub ntawv daws teeb meem qis mus rau nruab nrab mus rau ib qho kev daws teeb meem tsis pub dawb hu ua STiNG (.stn). Cov ntaub ntawv STN no tuaj yeem qhib ntawm txhua qhov kev daws teeb meem uas koj xaiv.
Txog tsis ntev los no, cov cuab yeej no yog koj thawj koom ruam zoo tshaj plaws rau kev daws teeb meem. Niaj hnub no, lub koob yees duab thiab scanners tau zoo dua thiab nqis los ntawm tus nqi, thiab kev nqis peev hauv Cov Fractals tiag tiag tsis yooj yim raws li nws ib zaug. Yog tias koj muaj kev xaiv tso koj cov nyiaj rau hauv cov khoom siv zoo dua li cov kev daws teeb meem software, feem ntau nws yog txoj hauv kev zoo dua mus. Txawm li cas los xij, rau qhov zoo tshaj plaws, Qhov Tseeb Fractals yog qhov zoo nkauj heev. Nws kuj muaj lwm yam txiaj ntsig xws li cov ntaub ntawv me me rau kev khaws cia thiab khaws cia.
Alien daim tawv nqaij Blow Up
Txawm hais tias Cov Fractals tiag tiag yog tus thawj coj thaum ntxov hauv kev siv thev naus laus zis, Alien Skin's Blow Up plugin rau Photoshop yog qhov tsim nyog saib yog tias qhov loj loj yog qee yam koj xav tau. Blow Up txhawb ntau hom duab, suav nrog cov duab siab me ntsis. Nws tuaj yeem hloov kho cov duab hauv cov duab yam tsis muaj flattening, thiab cov kev xaiv los hloov qhov chaw, lossis ua ib daim duab tshiab.
Blow Up siv txoj kev ntse ntse tshwj xeeb thiab simulated zaj duab xis nplej txhawm rau txhim kho qhov pom ntawm qhov loj.
Txoj kab hauv qab
Thaum ntsuas cov txheej txheem no txhawm rau txhim kho kev daws teeb meem ntawm koj tus kheej, sim ua kom tsis txhob raug ntes nrog cov duab zoo li ntawm lub vijtsam. Koj lub peev xwm ntawm lub tshuab luam ntawv yuav ua rau muaj txiaj ntsig loj hauv cov txiaj ntsig kawg. Qee qhov kev sib piv yuav tshwm sim txawv ntawm qhov screen, tab sis NW nyuam qhuav pom thaum luam tawm. Nco ntsoov ua koj qhov kev txiav txim zaum kawg raws li cov ntawv luam tawm.
