Umurongo wa Alpha warasiguwe mu congereza gisanzwe
Umurongo wa alpha ni igice c’ishusho kibika ingene pixel yose ikwiye kuboneka. Imirongo y’amabara idondora umutuku, icatsi kibisi n’ubururu. Alpha idondora ububabare.
Iyo ukuyeho inyuma maze ugarungika hanze PNG ibonerana, ntuba uriko urafuta ibara gusa. Uriko urandika agaciro ka alpha kavuga ngo: gumana iyi pixel, uzimye iyi nzira, canke utume aka karere kataboneka rwose.
Ni co gituma ibicapo bibonerana bishobora gusa n’ibisanzwe iyo imirongo yoroshe ifashwe neza — kandi ni co gituma ibisohoka bibi hanze bisa n’ibitari vyo mbere n’igihe ikiganiro ubwaco ari gikomeye.
Icogereranyo coroshe
Ku pixel yose, alpha yishura ikibazo kimwe:
- opaque yuzuye: ikiganiro kigaragaza vyose
- bigaragara neza: nta kintu na kimwe muri iyo pixel gisigaye
- igice gica ibibatsi: pixel ivanga n’ico cose cicaye inyuma yayo
Uguca ibibatsi kw’igice ni co gituma umushatsi, ubwoya be n’imirongo yoroshe bishobora gusa n’ibishobora kwemerwa aho gukata n’umukasi.
Kubera iki ivyo bihambaye mu gukuraho inyuma
Gukuraho ivy’inyuma si “ugukuraho ivy’inyuma” gusa. Iciyumviro ciza gikeneye kandi urubibi rwitwararika neza iyo ishusho ishizwe ahandi hantu.
Alpha ni co gituma ivyo bivako bishoboka:
- ikintu kireremba hejuru y’ibara rishasha
- imirongo yoroshe iravanga aho gusa n’iyiteye ikidodo
- Urubaho rw’imbere rushobora kwerekana uturere ubusa
Iyo ata alfa, “inyuma yakuweho” akenshi iba isahani yera canke ikindi kintu gikomeye cuzuye.
Imirongo yoroshe n’imirongo ikomeye
Ivyiyumviro bikomeye ni ahanini ingingo zitaboneka canke zitaboneka. Ivyuma vyoroshe bikoresha umuvango.
Uwo muvumba ni ngirakamaro kuri:
- imirongo y’imisatsi
- ubwoya
- amapulasitike agaragara
- imirongo y’imirongo y’inyigisho
Ni ho kandi ingorane zibonekera. Iyo alpha ari bukwi na bukwi cane, ikiganiro kirasa n’icacitse. Iyo alpha ari umuvurungano, uronka fringe na halo.
Ni igiki alpha atari
Alpha sivyo:
- inyuma y’umweru
- igishushanyo c’urubaho rw’amabara ubwaco
- icemezo c’uburyo bwiza bw’urubibi
Checkerboard ni ikoraniro ry’imbere y’igihe gusa. Umweru n’ubu ni ibara. Alpha ni amakuru aboneka.
Akarorero ngirakamaro
Ibaze igicuruzwa gicaguwe gishizwe ku bendera y’umwiza:
- alpha nziza: ikiganiro cicara neza ata n’uruzitiro rw’agahama
- alpha y’intege nke: umurongo w’umweru canke w’ibara usigaye ukikuje umurongo
Ico gice c’inyuma akenshi ni inyifato y’inyuma y’amasigarira, si “igikoko ca PNG” c’akabanga.
Uko ivyo bifatanya na Easy Background Remover
Muri iyi nzira y’akazi:
- Gufungura ishusho y’inkomoko ishigikiwe
- Kuraho inyuma mu karere
- Gutunganya imirongo nimba bikenewe
- Wohereze hanze PNG kugira ngo uguseruka (alpha) kuzigame
Ntukeneye gucunga imirongo ya alpha n’amaboko nk’uko biri mu bishushanyo vyuzuye. Ukeneye gutahura igituma uburyo bwo kohereza hanze n’ugusukura urubibi bihambaye.
Amakosa asanzwe
Ikosa rya mbere: gufata alpha nk’ijambo ry’ubuhinga
Niba ukeneye gusubira gukoresha mu mice yose, alpha ni co kintu cose.
Ikosa rya 2: gutera urujijo urubibi rworoshe n’inyuma
Uburyohe bumwe bumwe ni bwiza. Ibara riboneka ry’inyuma rya kera si ryo.
Ikosa rya 3: gusubira kubika mu buryo bugabanya uguseruka
Iyo alpha itakaye, igice gica gihagarika guhinduka.
Ikosa rya 4: gutera iteka iciyumviro aho gutera iteka urubibi
Dosiye ibonerana ishobora kuguma isa nabi iyo iyo mask ari mbi.
Imeza yihuta
| Igihe | Insobanuro itomoye | | | Alfa | Uko pixel iboneka | | PNG igaragara | Ishusho ishobora kugumiza ahantu hari ubusa biciye ku alpha | | Urubibi rworoshe | Alpha y’igice ikikuje urubibi | | Halo / umurongo | Ibara ry’urubibi ridakenewe rirokoka gutemwa |
Ku bijanye n’intango y’iciyumviro kimwe, raba PNG ibonerana ni iki?. Ku bijanye no gusukura inyuma yo gukata, komeza ukoresheje Ibara ry’ugusesa n’ugutera imirongo ku bicapo.