Inkulumo ethi "ngaphandle kwe-gamut" ibhekisela kumbala wezinhlobonhlobo ezingenakwenziwa kabusha ngaphakathi kwesikhala sombala we- CMYK esetshenziselwa ukunyathelisa kwezohwebo. Isofthiwe yezithombe iklanyelwe ukusebenza ngezithombe ku-RGB isikhala sombala kulo lonke uhlelo lokuhlela.
Isikhala sombala we-RGB sinokububanzi obubanzi obukhulu bokubukeka kunemibala ye- CMYK echaza ukuthi kungani imibala ye-RGB ivame ukunyamalala uma ithuthelelwe ku-CMYK. Uma ushicilela isithombe kumele kuphishwe kabusha ngama-inks futhi la ma-inki awakwazi ukukhiqiza ububanzi obufanayo bemilayezo esingayibona ngamehlo ethu ngoba isikhala sombala se-RGB sisebenzisa ukukhanya, hhayi ukuhlobisa, ukuveza umbala.
Ngenxa yokuthi umbala wombala ongasetshenziswa kabusha ngeyinki umncane kakhulu kunalokho esikubonayo, noma imuphi umbala ongenakwenziwa kabusha ngeyinki ubizwa ngokuthi "ngaphandle kwe-gamut." Kwi-software yehluzo, uvame ukubona isixwayiso ngaphandle kwe-gamut uma ukhetha imibala eyoshintsha uma isithombe siguquliwe kusuka kumbala wombala we-RGB osetshenziselwa inqubo yokuhlela, kwesikhala se-CMYK esetshenziselwa ukunyathelisa kwezohwebo.
Isithombe esingenhla sinikeza umbono obala kakhulu wokuqonda i-gamut. Ibhokisi elingaphandle liwumbala owaziwayo kumuntu wanamuhla, kuhlanganise yonke imibala esingayibona nalabo esingenakukwazi, njenge-Ultraviolet ne-Infrared.
Isiyingi sokuqala imibala eyizigidi ezingu-16 ezitholakalayo emgqeni webala le-RGB kanye nombuthano wangaphakathi yonke imibala engayenziwa kabusha ngomshini wokunyathelisa. Leyo dot phakathi nendawo, kuzo zonke izinhloso nangezinhloso, iyimbobo emnyama. Uma usuka ekhoneni lebhokisi kuya echashaza, imibala ibonakala ibumnyama. Baqala ukukhanya njengoba uhamba.
Uma ukhetha umbala ku-gamut ye-RGB, iyoba neyilingana kumdlalo we-CMYK kodwa, umahluko. Uma umbala uhambela kulelo dot uthola umnyama.
Kubuyekezwe ngu-Tom Green
I-Graphics Glossary