PNG Amathuluzi

Tshintsha PNG kuya futhi kusuka kumafomethi ahlukahlukene

Mayelana PNG

Amafayela e-PNG asekela ukucaca futhi asebenzisa ukucindezela okungenakulahlekelwa, okwenza afaneleke kakhulu kuma-graphics, ama-logo, kanye nezithombe-skrini.

Ukusetshenziswa Okuvamile

Ukudala ama-logo nemifanekiso enezizinda ezisobala
Ukulondoloza izithombe-skrini kanye nobuciko bedijithali
Ihluzo zewebhu ezidinga ukucaca

PNG Ukushintsha

Yini ihele PNG?

I-PNG (Izithombe Zenethiwekhi Eziphathekayo) iyifomethi yefayela lezithombe ze-raster esekela ukucindezelwa kwedatha okungenakulahlekelwa kanye nokucaca.

Ingabe kukhona okulahlekile uma i-PNG iguqulwa ibe yifomethi engekho emthethweni?

Akukho data ye-pixel. PNG igcina isithombe ngokugcwele ngaphandle kokuyifinyelela, ngakho ukuguqulwa phakathi kwefomethi ezimbili ezingalahleki kuphindeka futhi kungaphinda kuphindeka ngaphandle kokulahlekelwa. Okungakwazi ukulahleka yizinto zonke ezingaphansi kwe-pixels — amaprofayili wemibala, ukubukeka okucacile, ukubukeka, i-metadata efakwe — ngoba usizo lwalezi luhluka kakhulu phakathi kwefomethi kune-pixel storage. I-PNG isebenzisa ukucindezeleka kwe-DEFLATE phezu kwemigqa yokuskena ehlolwe, ngakho wonke ama-pixel ahlala ngokugcwele, kanye ne-8-bit alfa channel ephelele.

Kungani amasithombe-skrini siphuma njenge PNG?

Ngenxa yokuthi isithombe-skrini siyisithombe esinjalo, lesi sifomethi singcono kakhulu. Okutholakala ku-screen simbala omnyama, umbhalo kanye ne-edge eqinile - ngokucacile isihloko siphatha kahle ukucindezeleka okungaba khona futhi umbhalo oshicilelwe u-encoder u-smears - futhi i-operating system iyazi, ngakho-ke ayikuhlinzeki ngesinqumo. Ukushintsha isithombe-skrini sibe yi-photo format kuvame ukukwenza kube mkhulu futhi kube buhlungu. I-PNG iyisinqumo esifanele sezithombe-skrini, amalogo, umdwebi we-line kanye nanoma yini eneziphetho eziqinile noma ezicacile — akukho ukusakaza, akukho umbala obandayo.

Kungani PNG yami ikhulu kakhulu kunale sithombe esifanayo njenge-JPG?

Ngenxa yokuthi igcina wonke ama-pixel, futhi kusithombe cishe akukho ama-pixel amabili afana. Ukucindezela okungaba khona kusebenza ngokuthola ukuphindeka, futhi imbewu, umsindo kanye ne-gradients inikeza okuncane kakhulu, ngakho ifayela lihlala lisencane kakhulu. Kusithombe-skrini, ilogo noma umdwebo we-line ucindezela ofanayo kubukeka kuhle. Lo mhlukaniso - omangalisayo kumbala oqinile, okhohlisa kuzithombe - yiqiniso lonke lapho lefomethi ilungile. I-PNG iyifomethi yesithombe esibi: isithombe esigcinwe njenge-PNG sivame ukuba likhulu izikhathi eziyisithupha kuya kweziyishumi kunesithombe esifanayo njenge-JPG noma i-WebP.

Ingabe i-PNG igcina isizinda esicacile?

Yebo - ifomu ligcina i-alpha channel engokoqobo, ngakho-ke ukucisha izithonjana, izithako ezibomvu kanye nezibopho zigcina ukubukeka kwazo ngaphandle kokufika ku-rectangle emhlophe. Ukushintsha kufomethi ngaphandle kwe-alpha kuyilapho kudlula khona okungalungile: izindawo ezibonakalayo zigcwele umbala oqinile, ngokuvamile omnyama noma obomvu, futhi akukho indlela yokubuyela emuva encane yokufihla isithako futhi.

Ingabe PNG iyifomethi efanele yezithombe-skrini ne-line art?

Yebo, ngenxa yesizathu esicacile ukuthi kuyinto engalungile yezithombe. I-chrome yokuxhumana, umbhalo kanye nama-graphic aqinile-e-edge ayizingxenye ezinkulu zombala ofanayo nezilimi eziqinile, eziphatha ukucindezeleka okungaba khona ngokuphumelelayo futhi ukucindezeleka okungaba khona ku-smears - i-tell iyi-halo emnyama evela ngaphesheya kokubhala lapho isithombe-skrini sidlula ku-encoder yezithombe. Gcina izithombe-skrini lapha futhi uguqule kuphela uma kukhona okuthile okuqhubekayo.

Ingabe ngisebenzisa PNG ngokuqondile kwikhasi le-web?

Yebo — wonke umsakazi okhona uyenza ngokusemthethweni, ngakho-ke adinga ikhophi engekho futhi adinga ukuguquka ngesikhathi sokushicilela. Imibuzo ekhona isisindo ngaphezu kokuxhasa: isithombe esifanayo kwifomethi yewebhu yamanje sivame ukuba isithathu sobukhulu ngekhwalithi ebonakalayo efanayo, okudinga ukukwenziwa nganoma yini ebonakala phezulu kwe-fold.

Ubani olawula i PNG?

Akukho muntu, futhi lokho kuyinto ebalulekile. Ulwazi oluthile luyimfihlo, umuntu angalisebenzisa ngaphandle kokubuza noma ukukhokha, futhi akukho nkampani engakwazi ukushintsha izimo ngemuva - ngakho-ke amafayela, amaqembu ajwayelekile namaqembu asemthethweni achaza amafomethi afana nalesi sinye sezinto ezikhona ezizovula eminyakeni eyisithupha. Ukuthengiswa akulona ukuhambisana, okulungile; kuyilapho akukho umhlinzeki odinga ukuwabiza uma ezinye izithuluzi zisebenzisa i-spec kahle. I-PNG yakhiwa ngo-1996 njengento eshintshayo engekho emthethweni ye-GIF, futhi yashintsha ibe yifomethi yesithombe esingenalutho esizenzakalelayo se-web.

Ingabe ngingenza ngiphinde ngibize isiqephu endaweni yokushintsha PNG?

Kunzima kakhulu, futhi kufanelekile ukuqonda ukuthi kungani: isithonjana siyisihloko, ngenkathi ama-bytes ngaphakathi kufakwe ngefomethi eyodwa ekhethekile. Ukushintsha igama kwenza ihele igama lakhe lithembisa okuthile okuqukethwe kwayo akusho ukunikela, futhi noma yini evula ihele noma liyiphoqa noma liyifunda kabi. Ukuphela kwephutha elincane yifomethi ezimbili ezikhona ngokusemthethweni ibhokisi elifanayo ngaphansi kwezinhlamvu ezahlukene — futhi ngisho lapho ukuphinda ubhale kahle kuphephile kunalokho ukushintsha igama.

Ingabe ngiguqula isibaya esigcwele se PNG amafayela ngasikhathi sinye?

Nge-akhawunti, yebo — khiphana ndawonye futhi zibekwe njengemisebenzi eyodwa endaweni yokuphathwa ngayinye ngasikhathi sinye, ngezinhlelo ezifanayo ezisetshenziswa ngaphesheya kweqembu futhi izimpendulo zibuyiselwe ndawonye. Ukuguquka okumahhala kusebenza ihele elilodwa ngasikhathi sinye (amathuluzi okuxhuma athatha amabini); i-plan ekhokhelwa yilokho okuvulela ukuqhubekeka kweqembu kanye nobukhulu bomgwaqo wefayela ngalinye, okukwenza ukuguquka kwehele lonke lisebenze.

Ingabe ngingenza i-PNG ibe mkhulu ngaphandle kokushaya ikhanda?

Kuncane nje. Ama-pixels athathwe yimingwane yonke ekhona: ukukhululwa noma ku-interpolates, okugcoba ama-edge, noma kusetshenziswa i-AI upscaler, okuthuthukisa imingwane efanelekayo engazange ibe ku-original. Okubini kulungile ngesinqumo esiphezulu se-third noma njalo futhi akukho okuguqula ithumbnail ibe yi-poster. Qala kusuka ku-copy enkulu onayo futhi ushintshe ubukhulu ngezansi lapho ukhetho lukhona.

Yini ezoba nehele lami PNG ngemuva kokuguqulwa?

Kususwa. Ukulayisha kanye nemiphumela eguqulwe zombili zihlala kumhlinzeki kuphela uma umsebenzi ufuna futhi zisuswa ngokuzenzakalela; ukudluliswa kuhamba nge HTTPS emigwaqweni emibini. Akukho muntu ofunda okuqukethwe, akukho okuhlobene, futhi akukho okudluliswa kunoma ubani. Uma ufuna ukuyeka ukulindela ukuhlanzwa okuzenzakalelayo, ukuvala umsebenzi kuzosusa amafayela ngokushesha.