Cima JPG

I-Free Online JPG Compressor

Khetha iifayile zakho

*Iifayile zicinyiwe emva kweeyure ezingama-24

Ubunjani Bokucinezela

Guqula iifayile ezifikelela kwi-1 GB simahla, abasebenzisi bePro banokuguqula iifayile ezifikelela kwi-100 GB; Bhalisa ngoku

Iyalayisha

Indlela yokuZicimeza JPG

1 Nciphisa i JPG images yakho kwibhokisi ephezulu, okanye ukhethe kwisixhobo sakho - akukho nto yokufakela kwaye akukho akhawunti yokuyenza.

2 Khetha ukuba kunzima kangakanani ukucofa: umgangatho okanye injongo ye bitrate, kwaye ngokuzenzekelayo ubungakanani obuncinane ukuba ubungakanani bubalulekile kuwe ngaphezulu kweenkcukacha.

3 Qala umsebenzi kwaye vumela abasebenzi ukuba baphinde bapakishe ifayile; okuqala wakho akatshintshwanga kwindawo.

4 Uthelekiso lobungakanani obutsha nokuqala, emva koko ulayishe ifayili ecinezelweyo JPG.

Cima JPG Imibuzo ebuzwa rhoqo

I-Cima JPG iyenza njani ifayili ibe ncinane?

Ngokucacileyo, ikhowudi iphinde iqhube i DCT quantumiser kwimeko yomgangatho okhethayo, ngoko ulondolozo luvela kwimeko yomgangatho ophezulu kunokuba kwimeko ye pixels ezincinci - ubungakanani bomfanekiso abutshintshi, kwaye umgangatho 80 yindawo eqhelekileyo emnandi. Akukho nto malunga nayo ixhomekeke ekufakeni kwakho isoftware: umsebenzi uqhuba iserver-side kwaye ubuyisela ifayile egqityiweyo.

Ingaba ifayili yam iya kuba ncinci kangakanani?

Oku kugqibwa yimixholo, hayi yisixhobo. Inkcukacha yomfanekiso, ifilimu yegranule kunye nomsindo womsebenzisi wokwazisa umelana nokucinezela; umbala othambileyo, iindawo ezinkulu ezifanayo, umzobo womgca kunye nokungaqhelekanga kobhalo. Lindela ukunciphisa okubalulekileyo kwiscreenshot okanye ilogo kunye nolunye oluncinci kwimifanekiso exakekileyo.

Ingaba ifomati yefayili yam itshintsha ukuba ndingagcina ntoni?

Very much so. I-JPG igcina i-8-bit RGB idlula kwi-DCT elahlekile ene-4:2:0 chroma subsampleing ngokumiselweyo, ngoko umbhalo omnyama olungileyo kunye nemiphetho eqinileyo zizinto zokuqala zokuncamathela. That determines both the headroom available and whether the saving costs you anything in fidelity.

Ingaba kukho into ekhethekileyo kwi JPG endimele ndiyazi phambi kokuba ndicofe?

Yes — Yonke i-save iphinde iqhube i-quantiser, ngoko ukuhlela kwakhona nokugcina kwakhona i-JPG kudibanisa ukulimala kokwenza nokuba awunakunyusa umgca wokutyibiliza womgangatho. It is worth knowing before you overwrite an original you might need again.

Yintoni impazamo eqhelekileyo xa uxinzelela JPG images?

Uxinzelelo lwefayile efanayo ngokuphindaphinda. Ugqithiso ngalunye kwifomati elahlwayo luhlobo olutsha lolahleko kwaye ulondolozo luncipha ngelixa ukulimala kunyuka. Yiya ukusuka kukuqala ukuya ku target yakho kwinyathelo elinye, ugcine ukuqala.

Ndifumana ntoni, kwaye ndingalawula njani utshintshiselwano?

Ifayile enye ecinezelweyo ngengeniso ngalinye, kwinqanaba lomgangatho okhetha kuyo kunokuba kumiselwe okumiselweyo. Ukuba isiphumo asizange sincinci ngokwaneleyo, ukunciphisa ubungakanani be pixel kuyakwenza okuninzi kunakutyhala umgca womgangatho ezantsi.

Yintoni endinokuyilayisha kwi Cima JPG?

Nantoni na ekufumaneni usapho lwe-raster - JPG, JPEG, JFIF ne-WebP - kunye neefomati ezingalunganga (PNG, BMP, TIFF) ukuba ufuna ukuzidibanisa kwiqela elinye. Ifomati ifundwa kwisihloko sefayili, hayi kwisiphelo, ngoko ke umfanekiso ogciniweyo nge-suffix engafanelekanga uhlala udlula.

Ingaba kukho umda wobungakanani befayili kwi Cima JPG?

Ewe: i-akhawunti ekhululekileyo iqhubekeka imifanekiso ukuya kwi-25 MB nganye, equka ngokucacileyo yonke ikhamera ye-JPG kunye nefowuni yomfanekiso; umsebenzi ukwenziwa yi-libjpeg-turbo ne-libwebp, iilayibrari ezifanayo umhleli we-desktop uqhagamshelana nazo. Iifayili ezinkulu zizinto ezi-1 ezimfutshane ezikhululekileyo eziza kukuthintela, kwaye umda yifayili nganye kunokuba yiqela ngalinye.

Ingaba i Cima JPG iya kunyusa ubunjani be JPG images yam?

Umthombo olahlwayo sele uyimpumelelo yendlela enye yokugqitha, kwaye nayiphi na imisebenzi efuna ukubuyisela ikhowudi idibanisa enye. Xa umsebenzi ungakwenziwa ngaphandle kokucofa i-pixel data siyenza endaweni, kwaye apho ayikwazi khona ukhetha umgangatho wezinto ozithandayo ngokwakho kunokuba ufumana okumiselweyo okumiselweyo.

Ndingaqhuba i Cima JPG kwi JPG images ezininzi ngaxeshanye?

Ewe. Nciphisa iqela lonke kwindawo yolayisho phezulu kwaye ziphole ngokuthe ngqo ngemimiselo efana nayo - le yisizathu esiphambili sokwenza oku kumkhangeli zincwadi kunokuba yifayile enye ngexesha kumhleli. Iiakhawunti ezikhululekileyo ziqhuba ifayile enye kwiqela; ugqithiso luyikhupha loo nto.

Ithini into ebangela ukuba i-EXIF ne-data yeprofayili yombala isebenze?

Ikhamera EXIF (ISO, i-shutter, i-lens, i-GPS) kunye ne-ICC efakwe kwiprofayili idluliselwa ngokumiselweyo, kuba ukulahla iprofayili kwenza umbala utshintshe xa uphinda urhweba ngaphakathi. Sebenzisa ukhetho lokhuseleko lokucoca i-metadata phambi kokukhuphela ukuba ujonge ukupapasha ifayili.

Ingaba i Cima JPG ibiza nantoni na?

Umhlathi Cima JPG ukhululekile ngaphandle kwe-akhawunti, akukho phawu lwamanzi kwimveliso kwaye akukho mnatha wobhaliso phambi kokukhuphela. Ukukhuphela kususwa ngokuzenzekelayo ngexesha elifutshane emva kokuba umsebenzi ugqibile.