RBG to CMYK

Did you ever asked yourself what is going on when you convert image from RGB to CMYK in Photoshop, or some other image editing software? One of the main operations of prepress is that conversion in process of preparation for printing. For this specific conversions image editing programs are using software structure called a lookup table. This article describes the rationale behind lookup tables, and why they are there, how it all works, and something more about ICC colour profiles. Read more.