ʻO RGB he hoʻohui ʻana o ke kukui, ʻo CMYK he hoʻemi ʻana o ka inc. He paʻakikī ke hoʻololi ʻana i waena nō ia i ka ʻanuʻu āpau ma mua o ka paʻi ʻana.
Pehea e hana ai ka kahuli mai RGB i CMYK
- E maʻemaʻe i nā kanal: kaumaha i R, G a me B e 255.
- E kiʻi i ka kanal normali loa a helu i ka key K = 1 − max.
- E lanakila i ka cyan, magenta a me yellow ma ka wehe ʻana i kēlā ʻāpana ʻeleʻele: C = (1 − R − K) / (1 − K), a pēlā aku.
- E hoʻololi i nā waiwai ʻehā a pau i nā pākēneka ma waena o 0 a 100.
Laʻana i hana
He approximation ʻana ia me ka ʻole o ka profile waihoʻoluʻu. Hoʻohana nā hale paʻi i nā ICC profile a me nā ink limits, no laila he kuhikuhi paʻa kēia mau helu, ʻaʻole he separation i hoʻomākaukau ʻia no ka press.
RGB a me CMYK wehewehe
He aha ka RGB?
Hōʻike ka RGB i kahi waihoʻoluʻu ma mau kanaloku ʻekolu o ke kukui — ʻulaʻula, ʻōmaʻomaʻo a me ke kanaloku polū — kēlā me kēia mai 0 a 255. Hoʻohuli ia i ka hana o nā pale maoli: inā pau nā ʻekolu i 255, makaʻele ke keʻokeʻo; inā pau i 0, makaʻele ka ʻeleʻele. He kūpono ka RGB inā pono ʻoe e hoʻoluku me kahi waihoʻoluʻu, a hoʻohui ʻia ka rgba() no ka ʻolepili.
- Hana kikokiko:
- rgb(R, G, B)
- Awāwa:
- 0–255 per channel
- Mākou kūpono no:
- code, canvas, koʻikoʻi me rgba()
He aha ka CMYK?
ʻO CMYK ka hiʻohiʻona ʻehā-ink i hoʻohana ʻia i ka paʻi: cyan, magenta, melemele a me ke key (ʻeleʻele), kēlā me kēia ma kahi pākēneka mai 0 a 100. Hoʻemi ka ʻinki i ka mālamalama ma ke ala o ka hoʻopau ʻana, ʻaʻole e hoʻokuʻu mai, no laila ʻoi aku ka liʻiliʻi o nā waihoʻoluʻu a hiki i CMYK ma mua o ka pale — no laila hiki i nā waihoʻoluʻu ʻālohilohi o ka pale ke ʻike i ka maʻū ma ka paʻi ʻana.
- Hana kikokiko:
- cmyk(C%, M%, Y%, K%)
- Awāwa:
- 0–100% per ink
- Mākou kūpono no:
- paʻi, hoʻopaʻa pūʻolo, artwork mākaukau no ka press
RGB to CMYK reference table
Nā waihoʻoluʻu CSS maʻamau loa, i kahuli ʻia mai RGB a i CMYK.
| Waihoʻoluʻu | RGB | CMYK |
|---|---|---|
| black | rgb(0, 0, 0) | cmyk(0%, 0%, 0%, 100%) |
| white | rgb(255, 255, 255) | cmyk(0%, 0%, 0%, 0%) |
| red | rgb(255, 0, 0) | cmyk(0%, 100%, 100%, 0%) |
| lime | rgb(0, 255, 0) | cmyk(100%, 0%, 100%, 0%) |
| blue | rgb(0, 0, 255) | cmyk(100%, 100%, 0%, 0%) |
| yellow | rgb(255, 255, 0) | cmyk(0%, 0%, 100%, 0%) |
| orange | rgb(255, 165, 0) | cmyk(0%, 35%, 100%, 0%) |
| teal | rgb(0, 128, 128) | cmyk(100%, 0%, 0%, 50%) |
| purple | rgb(128, 0, 128) | cmyk(0%, 100%, 0%, 50%) |
| gray | rgb(128, 128, 128) | cmyk(0%, 0%, 0%, 50%) |