JPG keeb kwm yav dhau txwv: hom ntawv dab tsi khaws tsis tau
JPG tsis tuaj yeem khaws cov keeb kwm yav dhau los pob tshab. Txhua pixel hauv JPG yuav tsum txiav txim siab pom cov xim, yog li qhov kev txiav tawm tau txais kev cawmdim li JPG yog flattened tiv thaiv dawb, dub, lossis lwm yam xim xaiv. Yog tias koj xav tau thaj chaw nyob ib puag ncig ib puag ncig kom nyob twj ywm, xa PNG hloov.
Qhov kev txwv no tsis ua rau JPG ib qho duab tsis zoo. Nws tsuas yog txhais tau tias JPG thiab cov ntawv tso tawm pob tshab muaj cov haujlwm sib txawv.
Dab tsi “tsis tuaj yeem ua kom pom tseeb” txhais tau tias
Ib daim ntawv txiav tawm muaj ob hom ntaub ntawv:
- pom xim ntawm qhov kev kawm;
- pom tau li cas txhua pixel yuav tsum yog, suav nrog tag nrho khoob thiab ib nrab pob tshab ntug pixels.
Qhov thib ob feem ntau hu ua alpha. JPG tsis muaj chaw khaws cia.
Thaum software hloov pauv pob tshab rau hauv JPG, nws yuav tsum txiav txim siab seb cov xim pom dab tsi hloov txhua pixel khoob. Qhov tshwm sim dhau los ua ib daim duab plaub ua tiav dua. Feem ntau qhov kev hloov pauv yog dawb, tab sis nws tuaj yeem yog dub lossis ib qho kev xaiv sau.
Tsis muaj dab tsi tsis ncaj ncees lawm nrog cov ntaub ntawv. Cov ntaub ntawv pob tshab tau raug tshem tawm vim tias hom ntawv hom tsis tuaj yeem nqa nws.
Rau cov lus qhia yooj yim-English rau alpha, saib Dab tsi yog pob tshab PNG?.
JPG tseem tuaj yeem yog cov tswv yim
Feem ntau lub koob yees duab thiab cov duab hauv xov tooj yog cov duab plaub zoo tib yam. Lawv tuaj txog nrog ib chav, phab ntsa, txoj kev, lossis lub rooj zaum twb pom tom qab qhov kev kawm. Qhov ntawd ua rau JPG ib txwm tawm tswv yim rau kev tshem tawm keeb kwm yav dhau.
Lub luag haujlwm tseem ceeb yog:
- qhib JPG qhov chaw;
- cais cov ntsiab lus;
- tshuaj xyuas thiab kho cov ntug;
- export cov txiaj ntsig tshiab li PNG.
Qhov chaw thiab cov zis tsis tas yuav siv tib hom ntawv. Hloov ib daim duab JPG rau hauv pob tshab PNG taug kev los ntawm txoj haujlwm ntawd ncaj qha.
Vim li cas cov keeb kwm dawb tuaj yeem nkag siab yuam kev
Ib qho kev txiav tawm ntawm cov dawb yuav zoo li pob tshab thaum pom ntawm nplooj ntawv dawb. Txav mus rau hauv qhov tsaus nti thiab daim duab plaub dawb ua pom tseeb.
Siv qhov kev sim ceev no:
- Muab cov duab tso rau ntawm qhov kaj uas tsis yog xim dawb;
- saib tag nrho plaub fab;
- xyuas qhov khoob ntawm caj npab, tes, thiab plaub hau.
Yog tias cov xim kuaj tsis pom los ntawm cov cheeb tsam ntawd, cov ntaub ntawv yog flattened. A .jpg filename paub meej tias yog vim li cas. Ib ‘.png’ filename tuaj yeem txhawb nqa pob tshab, txawm hais tias PNG tseem yuav tau txhob txwm xa tawm nrog kev sau ruaj khov.
Dawb yog xim. Transparency yog qhov tsis pom tom qab pixels.
Cov npoo muag muag qhia lwm qhov kev txwv
Kev txiav tawm zoo tsis tas yuav muaj qhov nyuaj. Cov plaub hau, plaub hau, ntaub, duab ntxoov ntxoo, thiab cov kab nkhaus tiv thaiv tuaj yeem muaj qhov pom ntawm ntug pixels. Alpha cia cov pixels sib xyaw nrog keeb kwm yav dhau los tshiab.
Thaum lub pob tshab ntug yog flattened rau hauv JPG, lub ntug yog sib xyaw rau ib qho xim ruaj khov. Muab qhov JPG rau ntawm cov xim sib txawv thiab koj tuaj yeem pom:
- daim ntawv qhia daj ntseg;
- ib tug dub fringe;
- boxy ces kaum nyob ib ncig ntawm zoo meej;
- ib tug matte sab laug los ntawm tus thawj sau.
Qhov no yog vim li cas tsuas yog tshem tawm cov duab plaub dawb los ntawm JPG tom qab tsis tas yuav rov qab qhov qub txiav tawm. Cov kev hloov pixels twb tau tov nrog dawb.
Rov ua dua JPG txuag tuaj yeem txo qhov zoo
JPG siv lossy compression. Nws yog tsim los ua cov duab duab me me los ntawm kev ua kom pom kev nthuav dav. Txhua qhov kev txuag ntxiv tuaj yeem qhia ntau lub suab nrov, blockiness, lossis smearing, tshwj xeeb tshaj yog nyob ib ncig ntawm qhov sib txawv ntawm qhov sib txawv.
Cov artifacts muaj teeb meem nyob ib ncig ntawm ib tug txiav tawm ciam teb vim hais tias ntawm ntug yog precisely qhov chaw huv si xav tau. Ib qhov chaw compressed hnyav yuav qhia tau tias:
- fuzzy contours;
- cov xim me me nyob ze ntawm tus qauv;
- ploj strands los yog nyias qhov chaw;
- xim suab nrov uas zoo ib yam li keeb kwm yav dhau.
Kev xa tawm mus rau PNG tiv thaiv lwm qhov poob JPG theem tom qab txiav tawm. Nws tsis tuaj yeem rov qab nthuav dav uas twb ploj lawm los ntawm qhov chaw, tab sis nws zam tsis ntxiv JPG compression rau cov txiaj ntsig pob tshab.
Thaum JPG tseem yog cov ntaub ntawv kawg nkaus
JPG tuaj yeem yog hom kev xa khoom tsim nyog thaum tag nrho cov no muaj tseeb:
- qhov kawg keeb kwm yog txhob txwm kho;
- pob tshab tsis tas yuav tsum tau;
- daim duab yog feem ntau yog photographic;
- lub hom phiaj lees txais lossis nyiam JPG;
- Kev xa me me me tseem ceeb tshaj qhov hloov pauv yav tom ntej.
Piv txwv li, ib daim ntawv banner tiav nrog cov duab thaij duab tag nrho yuav tsis tau txais txiaj ntsig los ntawm alpha. Daim ntawv teev cov duab dawb-tom qab kawg kuj tseem tuaj yeem xa ua JPG yog tias qhov tau txais cov ntsiab lus xav tau.
Lub ntsiab lus tseem ceeb yog kev xav. Flatten tus tswv pob tshab rau cov xim uas xav tau, tom qab ntawd tsim cov ntawv xa tawm JPG. Tsis txhob muab pov tseg tus tswv tshwj tsis yog tias koj paub tseeb tias qhov kev kawm yuav tsis xav tau lwm yam keeb kwm yav dhau los.
Lub rooj txiav txim siab siv tau
| Xav tau | Siv |
|---|---|
| Pib los ntawm lub xov tooj lossis lub koob yees duab yees duab | JPG tuaj yeem ua tau zoo |
| Khaws cia qhov chaw seem tom qab | PNG |
| Rov qab siv ib qho kev txiav tawm ntawm ntau xim | Pob tshab PNG tswv |
| Xa daim duab kawg ntawm ib qho keeb kwm ruaj khov | JPG tej zaum yuav haum |
| Khaws ib nrab pob tshab mos npoo | PNG |
| Ua raws li qhov chaw uas hais meej meej thov JPG | Flatten txhob txwm tshaj tawm, ces export JPG |
Rau kev sib piv dav dav ntawm cov ntawv txiav tawm niaj hnub, nyeem PNG vs WebP vs AVIF rau kev txiav tawm.
Feem ntau rov ua yuam kev
Renaming lub extension
Hloov ‘image.jpg’ rau ‘image.png’ tsis hloov cov ntaub ntawv lossis rov qab alpha. Export los yog hloov los ntawm software uas tau sau PNG cov ntaub ntawv.
Erasing dawb los ntawm flattened JPG
Qhov no tuaj yeem ua haujlwm rau cov duab nyuaj-edged yooj yim, tab sis nws feem ntau ua rau cov xim dawb ntawm cov ntsiab lus thiab tawm xim daj ntug paug. Rov qab mus rau tus tswv pob tshab yog kev nyab xeeb dua.
Xa cov saib ua ntej es tsis txhob xa tawm
Ib qho screenshot flattens tag nrho cov saib ua ntej, suav nrog cov checkerboard pom. Siv tus editor tus export ua.
Piv txwv tias txhua PNG yog pob tshab
PNG tuaj yeem nqa alpha, tab sis nws tseem tuaj yeem muaj cov keeb kwm tsis pom tseeb. Txheeb xyuas nws dhau ntawm cov xim sib txawv.
Kev ua haujlwm nyab xeeb tshaj plaws
Siv JPG rau qhov nws ua tau zoo: kev yees duab tawm tswv yim thiab kev cog lus ruaj khov-tom qab xa khoom. Siv PNG thaum qhov tshwm sim yuav tsum khaws cov pob tshab.
Khaws ib tus tswv PNG huv tom qab tshem tawm tom qab. Los ntawm tus tswv ntawd, ua ib daim JPG dawb, xim JPG, lossis lwm yam ntawv luam thaum xav tau. Qhov kev txiav txim no khaws cia cov kev xaiv thiab zam kev sim rov tsim kho qhov pom tseeb tom qab nws tau raug muab tshem tawm lawm.