Alpha channel kyerɛkyerɛɛ mu wɔ Borɔfo kasa a ɛnyɛ den mu

By Technical specialist

Alpha channel yɛ mfonini no fã a ɛkora sɛnea ɛsɛ sɛ piksel biara da adi. Kɔla akwan no kyerɛkyerɛ kɔkɔɔ, ahabammono, ne bruu mu. Alpha kyerɛkyerɛ opacity mu.

Sɛ woyi akyi na wode PNG a ɛda adi kɔ amannɔne a, ɛnyɛ kɔla nko na worepopa. Worekyerɛw alpha values ​​a ɛka sɛ: fa pixel yi sie, fade this edge, anaa ma saa beae yi nyɛ nea wontumi nhu koraa.

Ɛno nti na transparent cutouts betumi ayɛ sɛ abɔde bere a wɔadi anoano a ɛyɛ mmerɛw ho dwuma yiye — ne nea enti a nneɛma bɔne a wɔde kɔ amannɔne hwɛ sɛ ɛnteɛ bere mpo a asɛmti no ankasa yɛ nnam.

Nhwɛso a ɛnyɛ den no

Wɔ piksel biara mu no, alpha bua asɛmmisa biako:

• fully opaque: asɛmti no kyerɛ koraa
• a ɛda adi koraa: biribiara nni hɔ a efi saa piksel no mu nka
• fã bi a ɛda adi: piksel no ne biribiara a ɛte n’akyi di afra

Nwi fã bi a ɛda adi pefee ne ade titiriw nti a nhwi, aboa nhoma, ne nwi a ɛyɛ mmerɛw betumi ayɛ sɛ nea wotumi gye di sen sɛ wɔde nkankyee bɛtwitwa.

Nea enti a eyi ho hia ma akyi a woyi fi hɔ

Ɛnyɛ sɛ “wopopa akyi mfonini no” nko na akyi a woyi fi hɔ no. Nea ebefi mu aba pa nso hia ɔhye a ɛyɛ n’ade yiye bere a wɔde mfonini no asi baabi foforo no.

Alpha ne nea ɛma nea efi mu ba yi tumi yɛ yiye:

• asɛmti no floats wɔ kɔla foforo bi so
• soft edges blend sen sɛ ɛbɛhwɛ sɛ stamped
• checkerboard previews betumi akyerɛ mpɔtam a hwee nni mu

Sɛ alpha nni hɔ a, “akyi a wɔayi afi hɔ” taa bɛyɛ prɛte fitaa anaasɛ ade foforo a ɛyɛ den a wɔde ahyɛ mu ma.

Nsonsonoe a ɛyɛ mmerɛw vs anoano a ɛyɛ den

Hard edges dodow no ara yɛ gyinaesi ahorow a ɛnyɛ nea ɛda adi anaasɛ ɛda adi pefee. Nsonsonoe a ɛyɛ mmerɛw de afrafra di dwuma.

Saa afrafra no ho wɔ mfaso ma:

• nwi nhama
• aboa
• a ɛyɛ plastic a ɛyɛ fã bi a ɛyɛ mmerɛw
• a ewo motion-blurred contours

Ɛhɔ nso na ɔhaw da adi. Sɛ alpha yɛ mpofirim dodo a, ɛte sɛ nea asɛmti no atwa. Sɛ alpha yɛ basabasa a, wunya fringe ne halo.

Nea alpha nyɛ

Alpha nyɛ:

• a ewo akyi fitaa
• a ewo checkerboard nsusuie no ankasa
• a ewo ho a ewo edge quality a edi mu

Checkerboard yɛ nhyiam a wɔde hwɛ nneɛma ansa na wɔayɛ. Fitaa da so ara yɛ kɔla. Alpha yɛ data a wotumi hu.

Nhwɛso a mfaso wɔ so

Fa no sɛ wɔde afiri bi a wɔatwa agu frankaa a ɛyɛ sum so:

• alpha pa: asɛmti no tena ho tew a enni rim a ɛyɛ mmerɛw
• alpha a ɛyɛ mmerɛw: fringe fitaa anaa kɔla a ɛyɛ mmerɛw ka ho twa contour no ho hyia

Mpɛn pii no, fringe no yɛ anoano nneyɛe a aka, na ɛnyɛ ahintasɛm “PNG mmoawa.”

Sɛnea eyi ne Easy Background Remover di nkitaho .

Wɔ saa adwumayɛ nhyehyɛe yi mu no:

1. Bue fibea mfonini a wɔboa
2. Yi akyi no fi mpɔtam hɔ
3. Sɛ ɛho hia a, siesie anoano
4. Fa PNG kɔ amannɔne sɛnea ɛbɛyɛ a wɔbɛkora transparency (alpha) so

Ɛho nhia sɛ wode nsa di alpha channels ho dwuma te sɛ nea ɛwɔ graphics suite a edi mũ mu. Ɛsɛ sɛ wote nea enti a export format ne edge cleanup ho hia no ase.

Mfomso a wɔtaa di

Mfomso 1: alpha a wɔde di dwuma sɛ kasakoa a wobetumi apaw

Sɛ ɛho hia sɛ wosan de di dwuma wɔ akyi nsɛm nyinaa mu a, alpha ne asɛm no nyinaa.

Mfomso 2: adwene a ɛyɛ basaa soft edge ne leftover backdrop

Dwodwo bi ye. Kɔla dedaw a wotumi hu no nyɛ saa.

Mfomsoɔ 3: wosan de sie kɔ format a ɛma transparency gyae

Sɛ alpha yera a, cutout no gyae sɛ ɛbɛyɛ nea ɛyɛ mmerɛw.

Mfomso 4: asodi a wɔde bɛto adwene no so mmom sen sɛ wɔde bɛto anoano no so

Fael a ɛda adi pefee da so ara betumi ayɛ bɔne sɛ mask no yɛ rough a.

Ntɛmntɛm pon

Sɛ wopɛ adwene koro no ara a wofi ase a, hwɛ Dɛn ne PNG a ɛda adi?. Sɛ wopɛ sɛ wosiesie wo ho wɔ cutout akyi a, toa so fa Color spill and fringing on cutouts.