Kuyini GIFCA? I-GIF-image "VKontakte" hhayi kuphela

Kulo nyaka esisuka kuwona, izithombe animated aye abe ingxenye eyinhloko zokuxhumana kanye ukuzijabulisa imithombo. Kule ndaba, abasebenzisi "VKontakte" nezinye ezokuxhum unesithakazelo umbuzo yini SIFCO.

Umqondo ifomethi

I-GIF kungenziwa ziqala ngokuthi "format ukushintshisana izithombe ingcaca." Lwakhiwe nge CompuServe ngo-1987 ukuthumela bitmaps ngenethiwekhi.

Isithombe ne .GIF isandiso ingagcinwa ngaphandle kokuyekethisa ikhwalithi ufike 256 imibala ezivamile. Kungenzeka ukusekela kanye inqwaba shades e izithombe uma une Iphalethi ahlukene lohlaka ngalunye, futhi zero olephakathi izithombe. Ifomethi kuhilela ukusebenza standard umbala Palette. Isithombe lilondolozwe ngomugqa. Ngenxa amafayela LZW-onomfutho ngenombolo enkulu izifunda eyohlobo onomfutho kalula. Isithombe akaphelelwa definition.

Advanced-GIF-image

Kusho ukuthini GIFCA umsebenzisi yesimanje, uma ingenayo izithombe? Lena akuyona ukuthi ufunani. Ngakho-ke, ngokushesha ngemva kokudalwa kuka ifomethi ithuthukisiwe: kusukela 1989-GIF-amafayela kungaba ashukumisayo futhi aqukethe izindawo esobala. Animated GIFCA - isithombe equkethe izakhiwo eziningi, kanye nolwazi mayelana nobuningi ngendlela yokubonisa yabo. Ngokuvamile, le nqubo ibizwa looped, futhi ngemva kombukiso GIFCA iqalisiwe.

Phakathi palette imibala kungenziwa limenyezelwe ecacile. Kulokhu, iziphequluli yesimanje izoveza ngemuva ngokusebenzisa izindawo unpainted. obala Abantu Ngokukhetha, zisekelwa-PNG, i-gifok nobuntu: pixel elingu kungaba efayiliwe noma obala.

Lapho kuphumeleleka khona-GIF-format?

Ukwazi kahle ukuthi GIFCA, singaphetha ngokuthi lolu hlobo isithombe iyasiza lapho ifayela kufanele ibe usayizi ubuncane. Le ndawo kwi-Inthanethi: ekuphishekeleni ijubane ukulayisha amakhasi, onjiniyela ozama ukwehlisa ukusetshenziswa "ezisinda" kangaka izithombe, zikhetha GIFCA engasindi.

Ifomethi-GIF kuvamile nomklamo wewebhu. Akuve efanelekayo ukudluliselwa izithombe ezincane, e Umq. H. Iqukethe umbhalo. Kamnandi ehlotshiswe ezihlukahlukene amalebula inkinobho - hhayi ukuthi abanye, njengoba SIFCO. Noma kunjalo, i-GIF asifanele ukubeka izithombe. Ngenxa yale njongo-JPEG ekahle (JPG): Lokhu format akugcini kunombolo imibala okubonisa.

Animated SIFCO ngokuvamile sisetshenziswa umklamo amawebhusayithi. With ikhono ukushiya pixels esobala, GIF-isithombe ukulingana kahle ku uchungechunge ezinye izithombe.

izici lobuchwepheshe

Kuyini GIFCA? Okokuqala, it kuyehla "isisindo" isithombe. Indlela yokumiswa LZW-kokucindezelwa, okuyinto ikuvumela ukuba sihlanganise Amaphikseli impinda. Ngakho-ke, izindawo eyohlobo ngaphezulu, namandla uzobe isithombe encishisiwe. I-algorithm ivumela ukunqinda ayisishiyagalombili-bit izithombe Iphalethi ngaphandle izinga owenza umhlatshelo: idatha onomfutho kungenziwa wasimama ngokugcwele. Njengoba for the izithombe, kumkhawulo 256 imibala kuyoba engelapheki.

LZW algorithm efuna ifayela iziza efanayo ngokuthi amabinzana, esabela kubo nakomaka futhi kugcwalisa itafula. Ngokwesibonelo, isithombe has 70 amasethi Amaphikseli enombala owolintshi, ophuzi kanye pink ngombala. Ngamunye wabo bayonikezwa kwenani elifanayo - ngokwesibonelo, 8. Idatha izogcinwa ngesimo izikhathi 70 nokufaka eziyisishiyagalombili. The ephansi umsindo esithombeni, zlib isezingeni eliphakeme.

Esinye isici ifomethi iyona ndlela interlace yokugcina ulwazi. Imigqa zihlukaniswe amaqembu, ukushintsha oda zabo ngaphakathi ifayela. Nakuba isithombe ukulayishwa, kancane kancane ukuvela. Ngakho, nakuba ngokungangabazeki GIFCA alulayishiwe ngokugcwele, kungabonwa, kodwa ngokulungiswa aphansi.

Okokuqala eqoshiwe 1, 5, 9 futhi imigqa eyengeziwe ngezikhawu "4" oda efanayo zivela qalisa. Lapho u-25% ilandelwa, ungabona isithombe esilufifi. Ngaphezu kwalokho bavele 3, 7, 11 kanye eminye imigqa, isithombe likhanya izikhathi 2. Khona-ke balayisha nezinye uchungechunge (2, 6, 10, ... futhi 4, 8, 12 ...), futhi ethola ifomu sokugcina isithombe. Le ndlela ukuqoshwa kancane kwandisa usayizi SIFCO, kodwa ukukwazi ukubona wakhe ngaphambi kokuphela ukulanda kahle ukuthi leli phutha kancane.

Kuyini GIFCA "In Touch"?

Izithombe zopopayi, kulayishwe BK - lawa izithombe ezihambayo ngefomethi ye-GIF. Kulabo vele ukuthi GIFCA ukwazi indlela ngiyibeke phezu yokuxhumana.

Ukuze unamathisele izithombe kusuka kwenye indawo, kudingeka chofoza inkinobho yegundane kwesokudla bese ukuthola imenyu elikuvumela ukuba kopisha ikheli (URL). Khona-ke kumelwe iya kusayithi "VKontakte" bese unamathisela ikheli lendawo lapho avele GIFCA (isibonelo, emkhakheni lapho obhala ngayo iposi umbhalo odongeni). Uhlelo izolanda ngokuzenzakalelayo isithombe, bese isixhumanisi kungaba zisuswe. Cindezela u-Enter ukuze ushicilele SIFCO.

SIFCO ukulanda kusuka kwikhompyutha yakho, kufanele afakwe "Imibhalo" kwesigaba (ukwahlukanisa sivuliwe ku izilungiselelo). Chofoza "ukungeza idokhumenti", khetha ukufinyelela ezingeni. Ukuze SIFCO embikweni noma ngeposi, kufanele ucindezele inkinobho "Namathisela" futhi ukuthola ifayela.

Izithombe zopopayi, ukubonwa abangane, ungagcina ngokwakho. Ukuze wenze lokhu, kudingeka akusebenzise isithombe ne "+", chofoza kukho, qhafaza kwesokudla bese ukhethe imenyu into efiselekayo.

Kuyini SIFCO e VC? Lena yindlela emangalisayo ukuhlobisa iphrofayela yakho, imizwa, ukujabulisa wena kanye nabangane. Engeza izithombe ku ukuxhumana noma udonga nge computer yakho siqu noma amawebhusayithi: Manje uyazi indlela yokukwenza!