tashar Alpha ta bayyana a cikin harshen turanci bayyananne
Tashar alpha ɓangaren hoto ne da ke adana ** yadda kowane pixel ya kamata ya kasance a bayyane **. Tashoshin launi suna bayyana ja, kore, da shuɗi. Alpha ya bayyana rashin fahimta.
Idan ka cire bango kuma ka fitar da PNG bayyananne, ba kawai kake share launi ba. Kuna rubuta ƙimar alpha waɗanda ke cewa: kiyaye wannan pixel, ɓata wannan gefen, ko sanya wannan yanki gaba ɗaya ganuwa.
Abin da ya sa keɓaɓɓen yankewa na iya zama dabi’a lokacin da aka sarrafa gefuna masu laushi da kyau - kuma dalilin da yasa fitar da kaya mara kyau ba daidai ba ne koda kuwa batun kansa yana da kaifi.
Samfurin mai sauƙi
Ga kowane pixel, alfa yana amsa tambaya ɗaya:
- cikakken opaque: batun ya nuna gaba daya
- cikakken m: babu abin da ya rage daga wannan pixel
- wani ɓangare na fili: pixel yana haɗuwa da duk abin da ke zaune a bayansa
Bayyanar ɓarna shine dalilin da ya dace gashi, Jawo, da ƙwanƙwasa masu laushi na iya zama abin gaskatawa maimakon yanke da almakashi.
Me yasa wannan ya shafi cire bayanan baya
Cire bangon baya ba kawai “share bayanan ba.” Kyakkyawan sakamako kuma yana buƙatar iyakar da ke aiki daidai lokacin da aka sanya hoton a wani wuri dabam.
Alpha shine abin da ke sa waɗannan sakamako mai yiwuwa:
- batun yana iyo akan sabon launi
- gefuna masu laushi suna haɗuwa maimakon kallon hatimi
- Duban samfoti na iya nuna yankuna marasa komai
Ba tare da alpha ba, “cire bangon baya” yakan zama farantin faranti ko wani cikas mai ƙarfi.
Gefuna masu laushi vs gefuna masu wuya
Ƙaƙƙarfan gefuna galibi yanke shawara ne mara kyau-ko-m. Gefuna masu laushi suna amfani da haɗuwa.
Wannan cakuda yana da amfani ga:
- gashin gashi
- fur
- Semi-m robobi
- Motsin da ba su da kyau
Shi ne kuma inda matsala ta bayyana. Idan alpha ya yi sauri sosai, batun yana kama da yanke. Idan alpha ya lalace, za ku sami gefuna da halo.
Menene alpha ba
Alpha ba:
- farin bango
- tsarin checkerboard kanta
- garanti na cikakken ingancin gefen
Checkerboard babban taron samfoti ne kawai. Fari ne har yanzu launi. Alpha shine bayanan gani.
Misalin Aiki
Ka yi tunanin yanke samfurin da aka sanya akan banner mai duhu:
- mai kyau alpha: batun yana zaune a tsabta ba tare da kodadde baki ba
- Alfa mai rauni: farar fata mai laushi ko launi mai launi ya rage a kusa da kwane-kwane
Gefen yakan kasance barna da dabi’a na gefe, ba mai ban mamaki “kwarorin PNG.”
Yadda wannan ya haɗa zuwa Easy Background Remover
A cikin wannan tsarin aiki:
- Buɗe hoton tushe mai goyan baya
- Cire bangon gida
- Gyara gefuna idan an buƙata
- Fitar da PNG don haka ana kiyaye gaskiya (alpha).
Ba kwa buƙatar sarrafa tashoshi alpha da hannu kamar a cikin cikakken zane-zane. Kuna buƙatar fahimtar dalilin da yasa tsarin fitarwa da tsaftar gefen al’amarin.
Kuskuren gama gari
Kuskure 1: ɗaukar alpha azaman jargon zaɓi
Idan kana buƙatar sake amfani da bangon bango, alpha shine gabaɗayan batu.
Kuskure na 2: ruɗe baki mai laushi tare da ragowar bangon baya
Wasu taushi yana da kyau. Ganuwa tsohon-bayan launi ba.
Kuskure 3: Sake adanawa zuwa tsarin da ya sauke bayyananne
Idan alpha ya ɓace, yanke ya daina zama mai sassauƙa.
Kuskure 4: zargi ra’ayi maimakon gefe
Fayil na gaskiya na iya zama mara kyau idan abin rufe fuska yana da muni.
Table mai sauri
| Wa’adin | Ma’ana a fili | |------------------| | Alfa | Yadda ake ganin pixel | | M PNG | Hoton da zai iya ajiye wuraren da babu kowa ta hanyar alpha | | Taushi mai laushi | Partal alpha kewayen iyaka | | Halo/fasa | Launin gefen da ba a so wanda ya tsira daga yanke |
Don sigar farko ta wannan ra’ayi, duba Menene PNG na gaskiya?. Don tsaftacewa bayan yanke, ci gaba da Launi mai zubewa da tsinkewa.