Kukho imifanekiso yefomathi engasetyenziselwa kumaphepha ewebhu. Ezinye izibonelo eziqhelekileyo zi- GIF , JPG , kunye ne- PNG . Iifayile ze-SVG nazo zisetyenziswa ngokubanzi kumawebhusayithi namhlanje, ukunika abaqulunqi bewebhu kwakhona enye inketho kwi-inthanethi yomfanekiso.
GIF Izithombe
Sebenzisa iifayile ze-GIF kwimifanekiso enomncinci, inombolo ehleliweyo yemibala. Iifayile ze-GIF zihlala zinciphisa zingabi ngaphezu kwama-256 imibala ekhethekileyo. I-algorithm yokunciphisa iifayile ze-GIF ayinzima kakhulu kunokuba iifayile zeJPG, kodwa xa zisetyenziswe kwimifanekiso eqingqiweyo yombala kunye nokubhala ithengisa ubuncinane befayili yefayile .
Ifomathi ye-GIF ayifanelekanga imifanekiso yezithombe okanye imifanekiso eneembala ze-gradient. Ngenxa yokuba ifomathi ye-GIF inenani elincinci lemibala, iiladidi kunye neefoto ziya kugqiba nge-banding kunye ne-pixelation xa igcinwe njengefayile ye-GIF.
Ngokucacileyo, ungasebenzisa i-GIF kuphela kwimifanekiso elula kunye nemibala embalwa kuphela, kodwa ungasebenzisa kwakhona i-PNGs (nangaphezulu kwangoko kungekudala).
Izithombe zeJPG
Sebenzisa imifanekiso ye-JPG yezithombe kunye nemifanekiso enemifanekiso yemibala. Isebenzisa i-algorithm eqinileyo yokuncintisana evumela ukuba udale imifanekiso emfutshane ngokulahlekelwa emgangathweni komgangatho womfanekiso. Oku kubizwa ngokuthi "ukulahlekelwa" ukunyanzeliswa ngenxa yokuba enye yenkcazelo yomfanekiso ilahlekile xa umfanekiso ucacisiwe.
Ifomathi yeJPG ayifanelekanga kwimifanekiso eneetekisi, iibhloko ezinkulu zombala, kunye nemilo elula ngeenxa zonke. Oku kungenxa yokuba xa umfanekiso ucacisiwe, umbhalo, umbala, okanye imigca ingadibanisa ngenxa yomfanekiso ongacacile njengoko uya kugcinwa kwenye ifomathi.
Iimifanekiso zeJPG zisetyenziswe kakuhle kwiifoto kunye nemifanekiso enemibala kunye nemininzi yembala yemvelo.
Izithombe zePNG
Ifomathi ye-PNG yenziwe njengomtshintshi wefomathi ye-GIF xa kubonakala ukuba iifoto ze-GIF ziya kuxhomekeka kwimirhumo yemali. Iifayile zePNG zinezinga elingcono lokuncintisana kunezithombe zeGIF ezibangelwa imifanekiso encinci kunefayile efanayo egcinwe njengeGIF. Iifayile ze-PNG zinikezela ngokubonakalisa i-alpha, oku kuthetha ukuba unokufumana indawo yeemifanekiso zakho ezibonakalisa ngokucacileyo okanye zisebenzise uluhlu lwe-alpha transparency. Ngokomzekelo, isithunzi somthunzi sisebenzisa uhla lwezinto ezibonakalayo kwaye ziyakulungele i-PNG (okanye usenokuphela kuphela usebenzisa i-CSS izithunzi).
Imifanekiso ye-PNG, njenge-GIF, ayifanelekanga ngokufanelekileyo kwiifoto. Kunokwenzeka ukuba ujikeleze umcimbi wokubhanqa ochaphazela iifoto ezigcinwe njengeifayile ze-GIF usebenzisa imibala yeyona nto, kodwa oku kungakhokelela kwimifanekiso enkulu kakhulu. Iimifanekiso ze-PNG nazo azixhaswa kakuhle ngamafowuni asekudala kunye neefowuni zomnxeba.
Sisebenzisa i-PNG nayiphi na ifayile efuna ukukhanya. Sisebenzisa kwakhona i-PNG-8 nayiphi na ifayile eya ku fa nefana ne-GIF, usebenzisa le fom yePNG esikhundleni.
SVG Images
I-SVG imele iValable Vector Graphic. Ngokungafani neefom e-raster-based based found in JPG, GIF, kunye ne-PNG, ezi fayile zisebenzisa ama-vectors ukwenza iifayile ezincinci ezinokuthi zinikezelwe nawaphi na ubungakanani ngaphandle kokulahleka komgangatho wokwanda kwefayile yefayile. Ziyidalwe kwimifanekiso enjengeempawu kunye neempawu.
Ukulungiselela Imifanekiso Yokunikezelwa Kwewebhu
Kungakhathaliseki ukuba yiyiphi ifomati oyisebenzisayo, kunye newebhusayithi yakho ngokuqinisekileyo isebenzise inani leefomathi ezahlukeneyo kuwo onke amaphepha alo, kufuneka uqinisekise ukuba yonke imifanekiso kwiwebhusayithi ilungiselelwe ukuhanjiswa kwewebhu . Imifanekiso emikhulu inokubangela ukuba indawo isebenze ngokukhawuleza kwaye ibe nefuthe le ntsebenzo jikelele. Ukulwa nale nto, loo mifanekiso kufuneka ilungele ukufumana ukulinganisela phakathi komgangatho ophezulu kunye nobukhulu befayile obuphantsi kunokwenzeka kwilo nqanaba lomgangatho.
Ukukhetha ifomathi yefayile efanelekileyo yinxalenye yemfazwe, kodwa kwakhona ukuqinisekisa ukuba uzilungiselele ezo fayile yiyathelo elilandelayo kule nkqubo ebalulekileyo yokunikezelwa kwewebhu.
Inqaku loqobo loJennifer Krynin. Ehlelwe nguJeremy Girard.