Dithering scatters txawv xim pixels nyob hauv ib daim duab kom nws tshwm sim li tab sis yog cov xim nruab nrab hauv cov duab uas muaj tsawg heev palette. Qhov no feem ntau pom nrog cov duab kos rau cov nplooj ntawv web page.Your operating system yuav txiav duab dither thaum koj cov duab tso tawm rau 256 xim los yog tsawg dua.
Dithering feem ntau yog siv los txo cov banding hauv GIFs nrog cov xim xim tiav. Feem ntau cov software muab kev xaiv uas cia koj tswj cov tsos ntawm cov pixels tawg nto; Piv txwv, cov kev faib ua tau yog ib qho qauv nruj, nrov suab nrov, los yog diffusion. Nco ntsoov hais tias kev dithering muaj peev xwm nce cov duab loj ntawm daim duab, tab sis feem ntau, qhov kev ua kom zoo tuaj yog tsim nyog rau kev lag luam tawm.
Ib txoj hauv kev zoo ntawm kev nkag siab tias kev ua haujlwm dithering yog los qhib cov yeeb yuj duab hauv Photoshop . Los ntawm kev xaiv cov ntaub ntawv> Export> Txuag rau Web site (Txojsia) . Thaum lub vaj huam sib luag opens xaiv lub 4-Up tab.Koj yuav pom 4 cov duab ntawm daim duab thiab ib qho nyob rau sab qaum sab sab sauv yog thawj daim duab. Hauv qhov no, daim duab yog 1.23 mb loj. Yeej tseem zoo, lub vaj huam sib luag no muab rau koj saib ua ntej pom cov duab zoo tshaj plaws. Muaj ob peb yam uas yuav tsum tau ua tib zoo saib xyuas rau hauv lub vaj huam sib luag.
- Thawj yog qhov kev xaiv ntawm palette xaiv . Dab tsi qhov no yog los tsim kom tau ib qho kev cai xim los ntawm kev piv txwv cov xim ntawm cov spectrum predominant hauv daim duab . Piv txwv, ib daim duab uas tsuas xim ntsuab thiab liab, zoo li daim duab, tsim tawm cov xim xim ua feem ntawm cov zaub ntsuab thiab kev nyuaj siab. Feem ntau cov duab ntxim siab xim hauv cov cheeb tsam ntawm cov spectrum.
- Cov Lus Xim Xim yog qhov tseem ceeb tshaj plaws los saib. Cov lus no yog hu ua Daim Ntawv Xim Xaim los yog CLUT. Qhov nws tsis yog coj cov xim thawj xim nyob rau hauv ib qho duab thiab remap lawv kom txawv, xim tshwj xeeb kom tsim tau ib qho zoo. Nyob rau hauv peb cov ntaub ntawv lub tsheej lab ntawm cov xim hauv cov duab qub tau raug txo kom 32 xim nrog grays, zaub ntsuab thiab reds predominating.
Xaiv cov duab hauv kaum sab xis saum toj, txo cov xim rau 32 thiab nias lub Dither slider mus rau 0%. Xaiv Diffusion ntawm Dither hom pop cia. Daim ntawv ceeb toom tias cov ntaub ntawv me me tau plummeted rau 67 k thiab ntsuab paj zoo li ib daig ntawm xim. Qhov kev xaiv no ua rau muaj kev sib txawv ntawm cov dots uas yog txhua tus loj tib yam tab sis nyob sib txig los ze zog los yog sib nrug ntxiv kom tau qhov ntxoov ntxoo uas "zoo" sib xws thawj daim duab.
Xaiv cov duab hauv qab ntawm kaum sab laug thiab hloov nws txoj kev diffusion rau Txawv . Thawj qhov uas tau pom yog cov ntaub ntawv loj tau nce mus rau 111 1k. Qhov no vim hais tias Photoshop siv qhov kev sib tw zoo ib nrab hnub rau simulate cov xim, tsis nyob rau xim rooj. Cov qauv no pom tau zoo heev thiab yog tias koj sib piv Diffusion duab nrog rau qhov no koj yuav pom ntau xim thiab duab kom meej.
Xaiv cov duab nyob hauv qab ntawm kaum sab xis thiab muab nws txoj kev diffusion rau Qib . Ib zaug ntxiv yog muaj cov ntawv cim nce ntxiv nrog rau kev nce qib xim thiab duab kom meej. Dab tsi muaj tshwm sim yog Photoshop tau siv cov qauv txawv zoo li Diffusion dither txujci, tab sis tsis muaj diffusing tus qauv thoob plaws pixels uas nyob ib sab. Tsis tau muaj qhov nqes tuaj nrog Lub Nruab Nruab Nruab Nruab Nruag thiab ntau npaum li cov xim hauv Cov Ncauj Lus Xim.
Koj tuaj yeem pom cov sijhawm rau txhua daim duab nyob hauv qhov 4-Up saib. Tsis txhob them ntau dua rau lawv vim lawv yog cov sij hawm nruab nrab thiab tsis tshua muaj, yog tias puas, yog. Cov pop-down ntawm lub sijhawm cia koj xaiv cov bandwidth. Cov kev xaiv ntawm ib yam 9600 bps (Cov Khoom Tsawg Ib Qib Ob los yog Baud Tus nqi) dial-up modem rau super ceev. Qhov teeb meem ntawm no yog koj tsis muaj kev tswj xyuas li cas tus neeg tau txais daim duab .
Yog li uas Dither txoj kev xaiv? Nov yog qhov uas kuv nqis tawm thiab tsis teb cov lus nug ntawd. Thaum nws los txog rau cov kev txiav txim siab lawv muaj kev xav, tsis yog lub hom phiaj. Koj ua tus hu zaum kawg.