Tshintsha ubungakanani JPEG

I-Scale JPEG images ukuya nakweyiphi na ubungakanani

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Iinketho Zobungakanani kwakhona:

Ububanzi (px)

Ubude (px)

Gcina ubungakanani bendawo yokubonisa

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Iyalayisha

Indlela yokuguqula ubungakanani JPEG

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

2 Ngenisa ububanzi obumiselweyo, ubude obumiselweyo okanye iphesenti, kwaye ushiye isitshixo sothelekiso lwezinto ezibonakalayo sisebenza ngaphandle kokuba ufuna ukutsala ngokuzithemba.

3 Sebenzisa ubungakanani kwakhona; ifayile nganye kwiqela lithathwa kwinjongo efanayo kwindlela enye.

4 Layisha ezantsi ifayili eguqulwe kancinane JPEG, okanye iseti yonke kunye njengendawo yokugcina enye.

Tshintsha ubungakanani JPEG Imibuzo ebuzwa rhoqo

Ingaba ifomati yombhalo inegalelo kwiziphumo zotshintsho lobungakanani?

Iyenza. I-JPEG yi-codec efanayo ne-JPG phantsi koluhlu olude — i-DCT efana ne-pipeline, i-quantization table efana ne-quantization table, akukho nto malunga nee-pixels ezitshintsha ngegama lefayili. Oku kugqiba ukuba uxinzelelo lwefayile luyingxaki ye pixels kuphela okanye ingxaki yokubuyisela ukukhowuda.

Ingaba kukho into ekhethekileyo kwi JPEG endimele ndiyijonge?

Ewe — i.jpeg ne.jpg izilungiso ziyi-bitstream efanayo, ngoko akukho nto apha esebenza ngokuhlukileyo kune-.jpg — kuphela igama lefayili litshintsha. Kufuneka ujonge phambi kokuba utshintshe ubungakanani befayili oza kukwazi ukuyibuyisela kwakhona.

Yintoni impazamo eqhelekileyo xa utshintsha ubungakanani be JPEG 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.

Ndingaqhuba i Tshintsha ubungakanani JPEG kwi JPEG 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 lokususa i-metadata phambi kokukhuphela ukuba ujongene nokupapasha ifayili.

Ingaba i Tshintsha ubungakanani JPEG ibiza nantoni na?

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

Ingaba kukho umda wobungakanani befayili kwi Tshintsha ubungakanani JPEG?

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.

Kutheni i PNG inxuwa liququzelela Tshintsha ubungakanani JPEG?

PNG.to ibekwe phantsi kohlobo olusebenzisayo xa awukwazi ukulahlekelwa yi-pixel: akukho lahlekelwa, i-alpha-ekwaziyo, neimpendulo elungileyo yescreenshots, ilogos, umzobo womgca nantoni na enemiphetho eqinileyo. Umsebenzi womfanekiso awusoloko uthatha inyathelo elinye: abantu bafika ukutshintsha ifomati kwaye bashiye befuna umfanekiso ohlukileyo kubungakanani, ubunzima obuhlukileyo okanye isimbo esihlukileyo. Ukusebenza Tshintsha ubungakanani JPEG kwindlela yokukhuphela enye, ubungakanani obufanayo becaps kunye neakhawunti enye yisizathu esipheleleyo esikhona apha kunokuba kwi tab yesine.

Ndiza kwenza ntoni ngeziphumo xa i Tshintsha ubungakanani JPEG igqityiwe?

Umguquli kule ndawo ushenxisa imifanekiso ukuya nakwi-PNG, JPG, WebP, GIF ne-SVG — eyona nto iphambili apho ukhetho malunga nokubonakala ngathi luya kwenziwa. Lo ngumhlathi abantu abaninzi bafika ngawo, kwaye ukuyenza emva Tshintsha ubungakanani JPEG kunokuba phambi ithetha ukuba uguqulelo lusebenza kwifayile ogqibile ukumisela kuyo.

Ingaba Tshintsha ubungakanani JPEG apha isixhobo esifanayo esisebenza kumasayithi afana nalowo?

Iinjini zinikezelwa - iilayibrari ezifanayo, abasebenzi abafanayo, amaqondo afanayo. Okuhlukayo kukucebiso, kwaye ucebiso apha luqala kwinyani enye malunga nefomati le ndawo ibizwa emva: akukho mqhoboshi womgangatho onokuthi uphume embi — i-PNG ijikeleza-ihamba ngokuchanekileyo, ngoko into ekuphela kwayo eyenza utshintsho ibiza ubungakanani befayili. I PNG indawo ithetha malunga apho PNG yindawo efanelekileyo yokugqitha kwaye apho ayiyiyo, kwaye loo hlolo lixabiso ngaphezulu kweqhosha.

Ndifuna i-akhawunti, kwaye ngaba kukho into egcinwa?

Akukho akhawunti, kwaye akukho nto igcinwa: ulayisho lususwa kubasebenzi emva komsebenzi ugqiba, kwaye akukho nto uyenzayo ikhowudi, idweliswe okanye isetyenziswa nakweyiphi na enye into. Iiakhawunti ezikhululekileyo zikhona kwimbali kunye nobungakanani beqela, hayi kwingeniso.