Cindezela JPEG

Yenza JPEG images ncane ku-inthanethi

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Indlela yokucindezela JPEG

1 Nciphisa i JPEG images yakho kwibhokisi eliphezulu, noma ukhethe kusuka kwidivayisi yakho — akukho okuzofakwa futhi akukho i-akhawunti eyenza.

2 Khetha ukuthi kunzima kangakanani ukucindezela: umgangatho noma i-bitrate efanele, futhi ngokuzikhethela ubukhulu obuncane uma ubukhulu bubalulekile kuwe kunemingwane.

3 Qala umsebenzi bese uvumela abasebenzayo ukuthi baphinde bahlanganise ihele; okubhaliwe akushintshiwe endaweni.

4 Linganisa ubukhulu obusha nobukhona, bese ulanda ifayela elicindezelwe JPEG.

Cindezela JPEG Imibuzo Evame Ukubuzwa

Yini engitholayo emuva, futhi ngingakwazi ukuphatha i-trade-off?

Ihele elilodwa elicindezelwe ngengeniso ngalinye, kukhwalithi noma izinga le-bitrate okhetha kuyo kunephutha eliqinile. Uma imiphumela ingancane ngokwanele, ukuguqula izilinganiso noma isikhathi sizokwenza okuningi kunalokho ukucindezela isici sokuzingela ngezansi.

Indlela i Cindezela JPEG eyenza ngayo ihele lincane?

Ngokucacile, umbhalo-mbhalo uphinde uqhube i-DCT quantumiser ku-quality factor okhetha ngayo, ngakho ukulondolozwa kuvela kuma-coarser coefficients ngaphezu kwama-pixels ambalwa — ama-dimensions wesithombe ashintshi, futhi quality 80 yindawo ejwayelekile emnandi. Akukho lutho oluphathelene nalo luya ngokuthi ufaka kanjani isofthiwe: umsebenzi usebenza ngasekhasini lomsekeli futhi ubuyisela ihele eliqediwe.

Ingabe kukhona okuthile okukhethekile ku JPEG okufanele ngikwazi ngaphambi kokucindezela?

Yebo — i.jpeg ne.jpg izixhumanisi ziyi-bitstream efanayo, ngakho akukho okuthile lapha okuzosebenza ngokuhlukile ku-.jpg — igama lefayela kuphela elishintshayo. Kubalulekile ukwazi ngaphambi kokubhala ngaphezulu okujwayelekile okungahle kudinga ukuphinda.

Yini iphutha elivame kakhulu uma licindezela JPEG images?

Ukucindezela ifayela elifanayo ngokuphindaphinda. Ukuhamba ngalinye kwifomethi elahlekile kuyisizukulwane esitsha sokulimala futhi ukulondolozwa kuncane uma ukulimala kuqoqwa. Iya kusuka kukuqala kuya kunjongo yakho ngenyathelo eyodwa, futhi ugcine okukuqala.

Yini engikwazi ukuyifaka ku Cindezela JPEG?

Noma yini emndenini we-lossy raster — JPG, JPEG, JFIF ne-WebP — kanye nefomethi engalahleki (PNG, BMP, TIFF) uma ufuna ukuzixhuma ndawonye. Ifomethi ifundwa kusuka kuhele lombhalo ophezulu, hhayi isizukulwane, ngakho isithombe esigcinwe nge-suffix engalungile sizoqhubeka sihamba.

Ingabe kunesilinganiselo sobukhulu behele ku Cindezela JPEG?

Yebo: ama-akhawunti amahhala asebenza ngezithombe kuze kube yi-25 MB ngayinye, ehlanganisa ngokuyinhloko yonke ikhamera JPG nesithombe sefoni; umsebenzi ukwenziwa yi-libjpeg-turbo ne-libwebp, ama-library afanayo umhleli wedesktop uxhumana nawo. Amafayela amakhulu yizinto ezincane ezizokuvimbela ukungena ku-free level, futhi umkhawulo uhele ngalinye hhayi iqembu ngalinye.

Ingabe Cindezela JPEG izonciphisa ukhwalithi ye JPEG images yami?

Umsuka olahlekelwayo usuke umphumela wesikhathi sokungena esingu-1, futhi noma yisiphi isenzo esidinga ukuphinde sikhombise sifaka isithupha. lapho umsebenzi ungakwenziwa khona ngaphandle kokuchofoza i-pixel data sizokwenza lokho endaweni, futhi lapho kungasakwazi khona ukhetha i-quality factor wena ngokwakho ngaphezu kokuthola iphutha eliqinile.

Ingabe ngizosebenzisa Cindezela JPEG ku JPEG images amaningi ngasikhathi sinye?

Yebo. Thola isethulo esigcwele endaweni yokulayisha bese zihamba ngokufanayo nezilungiselelo ezifanayo - lokhu kuyisizathu esiyinhloko sokwenza lokhu kubrowser ngaphezu kwefayela elilodwa ngasikhathi sinye kumhleli. Ama-akhawunti amahhala aqhuba ifayela elilodwa ngasikhathi sinye; i-pass lifts that.

Kungani i EPUB site i host Cindezela JPEG?

EPUB.to ifakwe evulekile eBook format - XHTML e zip, reflowable ngokudweba, futhi efundeka ku hardware akukho umuntu ocabanga mayelana layout for. Incwadi iyi-zip egcwele i-markup, izithombe nefonti, ngakho-ke cishe yonke imisebenzi abantu abaletha kuwebhusayithi ye-eBook isebenza kakhulu kusinye sezizinto. Cindezela JPEG isebenza ku-upload efanayo ne-akhawunti efanayo njenge-conversions ngoba lapho idingeka khona.

Yini okufanele ngiyenze ngemiphumela uma i Cindezela JPEG iqediwe?

Isiguquli kule ndawo sihamba namabhuku phakathi kwe-EPUB, MOBI, AZW3, PDF ne-DOCX, ngakho-ke isihloko siphele kunoma yisiphi isisetshenziswa esizofunda. Ukwenza lokhu ngemuva kwe Cindezela JPEG kusho ukuthi ukuguqulwa kwenziwa kusuka kuhlobo olusetshenziswe, hhayi kusuka kulowo ongeke uphinde ulungise.

Ingabe Cindezela JPEG lapha ithuluzi elifanayo lezindawo ezifanayo ezisebenza?

Ama-engine ahlukaniswe - i-toolchain efanayo, abasebenzi abafanayo, ama-limits afanayo. Okuthi EPUB site ikhuphule yimbono yokubuyela emuva: iyiphi yalezi misebenzi incwadi ebuyela emuva eqinisweni ixhasa, nokuthi iyiphi kuphela eyenza umbono ku-fixed-layout media ngaphakathi kwayo. Iqala futhi kusuka kuqiniso elinye mayelana nefomethi le site ibizwa ngemuva: incwadi iyi-zip ye-XHTML ene-manifest, ngakho-ke umbhalo ubiza cishe akukho futhi wonke umzamo obalulekile ukhuluma ngezithombe ezifakwe ngaphakathi nefonti eziseduze.

Ngidinga i-akhawunti, futhi yini egcinwa?

Akukho akhawunti, futhi akukho okugcinwa: ukuthunyelwa kususwa abasebenzayo ngemuva komsebenzi oqediwe, akukho okufundwayo futhi akukho okuhlobene. Ama-akhawunti amahhala akhona ngembali nenani leqembu, hhayi ukufinyelela.