Guqula JFIF ukuba JPEG

Guqula Eyakho JFIF ukuba JPEG iifayile ngokulula

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*Iifayile zicinyiwe emva kweeyure ezingama-24

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

Iyalayisha

Indlela yokuguqula JFIF ukuba JPEG

Inyathelo 1: Layisha eyakho JFIF iifayile usebenzisa iqhosha elingasentla okanye ngokutsala nokuwisa.

Inyathelo lesi-2: Cofa iqhosha elithi 'Guqula' ukuze uqalise ukuguqula.

Inyathelo lesi-3: Khuphela i-converted yakho JPEG iifayile

JFIF ukuba JPEG Imibuzo Ebuzwa Rhoqo Ngokuguqula

Ndiyiguqula njani i-JFIF ibe yi-JPEG ngaphandle kokulahlekelwa umgangatho womfanekiso?

Layisha phezulu ifayili yakho ye JFIF kwaye umguquli wethu usebenzise ukuphuculwa komgangatho owaziyo ifomati ye JPEG imveliso. Kwiinjongo ezingalahlekiyo (PNG, TIFF, BMP) yonke i-pixel igcinwa nge-bit-per-bit; kwiinjongo ezilahlekiyo (JPG, WebP) ungalungisa isizathu somgangatho (okungagqibekanga 90) phambi kokukhuphela. I-data yomfanekiso yi-JPEG eqhelekileyo; i-JFIF ichaza kuphela uxinzelelo kunye neendawo zokutyhila okukhawulezayo ezijikeleze, ngoko ke i-.jfif ne-.jpg zimfanekiso ofanayo. Uthungelwano lwee-bit lufana ne-.jpg: DCT-based lossy compression, ngokuqhelekileyo nge-4:2:0 chroma subsampling, olujikelezwe kwi-JFIF okanye kwi-Exif header.

Ingaba i JPEG igcina i-EXIF data evela kum JFIF?

Ngokungagqibekanga ewe, apho naphi na apho injongo ifuna ukubekwa khona - imodeli yekhamera, izicwangciso zokubonisa, iinwele kunye neGPS ikhowudi zihamba zonke. I-GPS yindawo efanele ucinga ngayo: ukuba umfanekiso uzakupapashwa, sebenzisa ukhetho lwe-strip-metadata ukuze ungasazibonisi apho umfanekiso uthathwe khona. I-JFIF yi-JPEG File Interchange Format — i-header ecacisa ukuba i-JPEG bitstream egqityiweyo iguqulwe ibe yifayili ephathekayo.

Ingaba uguqulelo JFIF ukuya ku JPEG lugcina ukubonakala ngaphaya?

Ukubonakala ngaphaya kuqhubeka xa JPEG yi-PNG, WebP, TIFF, GIF, okanye SVG. Ukutshintsha ukuba yi-JPG kwenza ukuba isiqhagamshelanisi se-alpha sifane nesiqalo esimhlophe — ukuba ufuna ukubonakala ngaphaya, khetha isiphelo esizimelayo esibonisa ngaphaya endaweni ye-JPEG. I-JPEG ifana ne-JPG — uluhlu lweeleta ezine luyaqala, kwaye eli letha lithathu likhona kuphela ngenxa ye-DOS 8. 3 umda wegama lefayili.

Ingaba i-inkangeleko yam yombala (sRGB / Adobe RGB / CMYK) iya kuhlala i JFIF ukuya ku JPEG?

Iiprofayili zombala we-ICC ezifakelweyo zifundwa kumvelaphi JFIF kwaye zidityaniswe kwakhona kwi-JPEG yemveliso apho ifomati ixhasa khona (JPG, PNG, TIFF, WebP). Iifomati ezingaxhaswanga yiprofayili zibuyela kwi-sRGB ngenyathelo elilula lokuqinisekiswa.

Ithini into ebangela ukuba i-EXIF metadata iguqulwe JFIF ibe yi JPEG?

I-EXIF yekhamera (ISO, i-shutter, i-lens, i-GPS) igcinwa ngokumiselweyo ngexesha JFIF -> JPEG xa zombini iifayili zixhasa i-metadata. Sebenzisa utshintshi lobumfihlo ukususa i-metadata phambi kokukhuphela ukuba ufuna ukuthumela imifanekiso ngaphandle kokubekwa kwendawo okanye ukubonisa umnwe wesixhobo.

Ndingaguqula izigidi zeefayili JFIF zibe JPEG ngaxeshanye?

Ewe - rhuqa iifayile ezininzi JFIF kwindawo yokulayisha kwaye zifolole ngokuthe tye. Umphakamo osimahla uyamkela i-100 MB ngefayili nganye; i-Premium ayinasiphelo sefayili nganye kwaye iqhuba abasebenzi abathe tye abaninzi, ngoko ke iqela lemifanekiso engama-200 ligqiba ngaphantsi kwemizuzu emibini.

I-JFIF ukuya kwi-JPEG ithelekiswa njani ne-Photoshop / i-GIMP kumsebenzi ofanayo?

Uguqulelo lwefomati olulula siqhuba i libpng / libjpeg- turbo / libwebp / ImageMagick imibhobho efanayo umhleli we desktop asebenzisayo, kwi umgangatho ofanayo. Utshintsho kukuba izixhobo ze desktop zivula ifayile enye ngexesha; siyamkela iqela kwaye siqhuba ngokuthe tye kwiseva- ecaleni kwabasebenzayo.

I-JPEG iifayili zinee-resolutions kunye nemilinganiselo eziphi?

Ukuziphatha okungagqibekanga kuku 1:1 — i-JPEG yakho yemveliso inezinto ezilinganayo ze-pixels njenge-JFIF. Ukuba ufuna ukuguqula ubungakanani njengenxalenye yokuguqula, sebenzisa /resize-image/ emva, okanye ubeke iinzame kwi- /image-pipeline/ utility.

Ingaba i JPEG ifayili incinane kangakanani na ukuba ayinazo izinto ezibonakalayo ezibonakalayo?

Kwi-JPG / WebP, umgangatho we-75-85 uhlala uvelisa i-JPEG 60-80% encinci kune-JFIF ngaphandle kotshintsho olubonakalayo kumgama wokujonga oqhelekileyo. Kwi-JPEG engenanto (PNG, TIFF), lindele ukonga okuncinci — ngokuqhelekileyo 5-30% nge-deflate / LZW yokucinezela engcono kuneleyo umboneleli sele uneyo. I-JPEG yindawo yokufaka ikhamera, i-scanner kunye ne-Unix-source software, kwaye iyaziwayo kwihlabathi liphela.

Ingaba iifayile zam JFIF zifihlakeleyo ngexesha lokuguqulwa?

Ewe — iifayile ezilayishwe phezulu JFIF ziqhubekekiswa kubasebenzi abakhethekileyo kwaye zicinywe kwimizuzu. Asizukufunda, sigcine, okanye sisebenzise i-pixel data. Ifestile yokugcina epheleleyo ibhalwe kwi /privacy/.

Ingaba i-JFIF ukuya kwi-JPEG iguqula imifanekiso enkulu kakhulu (50MP+)?

Ewe, simahla ukuya kwi-100 MB. I-Premium iphatha izingeniso ezinkulu kakhulu (300 MB+) kunye nobunzulu obukhethekileyo kwi-pixel nganye (16-bit PNG, 32-bit float TIFF, HEIF 10-bit). I-pipeline isasaza imiqolo ye-pixel ngoko ke uvimba weefayili usebenzisa izikali ngobalo lomqolo, hayi ubalo lwe-pixel jikelele.

Kutheni ifayili yam eguqulweyo JPEG incinci okanye ikhulu kunelindelekileyo?

Ifayili JFIF enesicitho esinamandla (JPG enesicitho esinzima) ihlala ikhula xa iphinde ikhowudiwe ibe yi JPEG engalahlekiyo (PNG, TIFF), kwaye i-bitrate ephezulu engalahlekiyo JFIF ihlala ikhula ngokugqithisileyo xa isiya kwi-JPG/WebP. Uthelekiso luxhomekeke kwizinto eziqulethe umfanekiso (iifoto zicitha ngokuhlukileyo kunelayini-yobugcisa okanye imifanekiso eqingqiweyo yekhusi). Uluhlu lwe.jfif luzalisa iiWindows kunye nezixhobo ezininzi ze web ezisebenzisayo ukuyeka ifayile, ekufuneka ikhoyo kuphela ngenxa yokuba umntu uguqula. I-JPEG ibelana ngazo zonke izithintelo ze-JPG — akukho lpha, ulahleko lokuzalwa kwi-re-save — kunye noxinzelelo oluthe kratya lwesoftware ephatha izithuba ezimbini ngokuhlukileyo.