Tshintsha ubungakanani JPG

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Iinketho Zobungakanani kwakhona:

Ububanzi (px)

Ubude (px)

Gcina ubungakanani bendawo yokubonisa

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Iyalayisha

Indlela yokuguqula ubungakanani JPG

1 Layisha phezulu i JPG images ofuna ukuyiguqula ubungakanani bayo - sebenze ukusuka kwi-original enkulu onayo kunokuba usebenze kwikopi esele uyincinane.

2 Misela ubungakanani obutsha: kumfanekiso, ububanzi nobude kwi-pixels kunye notshixo olukhethwayo lobungakanani be-aspect ratio; kwividiyo, enye yezinto ezimiselweyo ezisuka kwi-1920x1080 ukuya kwi-640x360.

3 Qala ubungakanani kwakhona; umfanekiso ulinganiselwe kubungakanani obukhethiweyo.

4 Layisha ezantsi ifayile eguqulwe kancinane ye JPG.

Tshintsha ubungakanani JPG Imibuzo ebuzwa rhoqo

I Tshintsha ubungakanani JPG itshintsha njani iimfuno?

Ngokucacileyo, Umfanekiso uphinda uthathwe ngesihluzi se Lanczos kwaye emva koko uphinde ukhowudiwe, oko kuthetha ukuba ubungakanani obutsha buphinda bucinezelwe kwakhona - ngoko yenza kabini ukusuka kukuqala okukhulu onalo kunokuba uyenze kwinqanaba. Umfanekiso unika ububanzi nobude ngee-pixels; ividiyo ukhetha enye yezinto ezimiselweyo. Isebenza ukusuka kumfanekiso omtsha kunokuba isebenze ukusuka kwikopi eguqulwe ubungakanani ngaphambili.

Ndingagcina njani uthelekiso lwezinto ezibonakalayo, okanye ndivumele ubungakanani obuchanekileyo?

Zonke. Tshixa uthelekiso kwaye ubungakanani obunye buvela kwelinye, ekufuneka uyenze rhoqo. Tshixa kwaye ufumane amanani abhaliweyo, ngexabiso lokutsala - esebenzayo kwi slot emiselweyo, engalunganga kwi mifanekiso.

Ingaba ifomati yombhalo inegalelo kwiziphumo zotshintsho lobungakanani?

Iyenza. 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. Oku kugqiba ukuba uxinzelelo lwefayile luyingxaki ye pixels kuphela okanye ingxaki yokubuyisela ukukhowuda.

Ingaba kukho into ekhethekileyo kwi JPG endimele ndiyijonge?

Ewe — Yonke i-save iphinde iqhube i-quantiser, ngoko ukuhlela kwakhona nokugcina kwakhona i-JPG kudibanisa ukulimala kokwenza nokuba awunakunyusa umgca wokutyibiliza womgangatho. Kufuneka ujonge phambi kokuba utshintshe ubungakanani befayili oza kukwazi ukuyibuyisela kwakhona.

Yintoni impazamo eqhelekileyo xa utshintsha ubungakanani be JPG images?

Ukunyuka. Ukunyusa akukwazi ukuvelisa inkcukacha ezingazange zithathelwe, ngoko ke impumelelo yifomathi ecocekileyo yokuqala kubungakanani obukhulu. Soloko uguqula ubungakanani ezantsi ukusuka kumcebo omkhulu onawo, uguqula ubungakanani kabini endaweni yemizuzu.

Yintoni imilinganiselo kufuneka ndiyibeke njengenjongo?

Uthelekiso lwe slot iya kuhlala kuyo. Ububanzi obupheleleyo web hero akazange afune ngaphezulu kwe 1920 pixels ububanzi, imixholo umfanekiso 1200, ithumbnail 400, kwaye ukuphindaphinda la manani iquka high- DPI ikhusi. Nantoni na ngaphezulu kwee bytes akukho mntu ubona.

Yintoni endinokuyilayisha kwi Tshintsha ubungakanani 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 Tshintsha ubungakanani JPG?

Ewe: i-akhawunti ekhululekileyo iqhubekeka imifanekiso ukuya kwi-5 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 Tshintsha ubungakanani 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 Tshintsha ubungakanani 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?

Oku kuxhomekeke kwisixhobo. Ukucofa kunqakraza i-EXIF kunye neprofayili yombala ofakwe ngaphakathi ukulondoloza isithuba, ngelixa uhlela njengenguqulo yobungakanani okanye ujikeleziso ungagcina. Akukho mmiselo kule phepha oza kukhetha, ngoko khangela ifayile ngombonisi we-metadata phambi kokukhutshwa ukuba indawo ye-data ibalulekile.

Ingaba i Tshintsha ubungakanani JPG ibiza nantoni na?

Tshintsha ubungakanani JPG ikhululekile ngaphandle kwe akhawunti kwaye idibanisa akukho phawu lwamanzi. Ulayisho phezulu neziphumo zicinywa ngokuzenzekelayo malunga neyure ezi 24 emva komsebenzi, oshiya ixesha lokulayisha ezantsi iziphumo.