Jikelezisa JPEG

Fihla Okuthe tyaba JPEG images

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Iyalayisha

Indlela yokujika JPEG

1 Layisha phezulu i JPEG images eyaphuma ngendlela engafanelekanga.

2 Khetha umjikelezo wesiqendu okanye umjikelezo wesiqendu, okanye ubhale i-engile ekhethiweyo kwaye ukhethe umbala weekona eziza kubonisa.

3 Sebenzisa ujikelezo; ii-pixels neflegi yolawulo zidityaniswe ukuze wonke umbukeli avume ukuba yeyiphi indlela ephezulu.

4 Layisha ezantsi ifayili ejikelezayo JPEG.

Jikelezisa JPEG Imibuzo ebuzwa rhoqo

Ingaba ifomati igqiba ukuba ujikelezo alulahleki?

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. Le mpahla igqiba ukuba ijikelezo lekota likhululekile okanye libiza ukubuyisela ikhowudi.

Nantoni na ekhethekileyo kwi JPEG ekufuneka ndiyazi?

Ewe — i.jpeg ne.jpg izilungiso ziyi-bitstream efanayo, ngoko akukho nto apha esebenza ngokuhlukileyo kune-.jpg — kuphela igama lefayili litshintsha. Yinto echaza ukuba kutheni ifayile ibonakale ilungile kwisicelo esithile kwaye ingalunganga kwisinye.

Kutheni ifayile yam ibonakale ilungile kwifowuni yam kodwa ijikeleze ngaphaya kwezinye iindawo?

Kuba ubeko lugcinwa njenge-EXIF flag kunokuba lugcinwe kwii-pixels, kwaye akukho mntu wonke obonakeleyo uyamhlonipha. Ukujikeleza apha kuyenza ibonakale ilungile - ii-pixels ne-flag zigqiba ekubeni zivumelane, ngoko ke ifayile ibonakala ifana naphi na.

Ndingajikelezisa iqela elipheleleyo kwindlela enye?

Ewe. Ujikelezo olufanayo lusetyenziswa kwifayile nganye olayishe kuyo, eyiyo inkqubo esebenzayo yokulungisa ifayile ye scans okanye ikhamera yemveliso esuka kwindlela engalunganga.

Ndingaqhuba i Jikelezisa 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 Jikelezisa JPEG ibiza nantoni na?

Umhlathi Jikelezisa 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 Jikelezisa 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 Jikelezisa 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 Jikelezisa JPEG kwindlela yokukhuphela enye, ubungakanani obufanayo becaps kunye neakhawunti enye yisizathu esipheleleyo esikhona apha kunokuba kwi tab yesine.

Ndiza kwenza ntoni ngeziphumo xa i Jikelezisa 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 Jikelezisa JPEG kunokuba phambi ithetha ukuba uguqulelo lusebenza kwifayile ogqibile ukumisela kuyo.

Ingaba Jikelezisa 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.