Dithering   The article mentions that  Pointillism is analogous to the fourcolor CMYK printing process used by some color printers and large presses that place dots of Cyan blue Magenta red Yellow and Key black Televisions and computer monitors use a similar technique to represent image colors using Red Green and Blue RGB colors  The technique used by CMYK printing is dithering among others The CMYK article even says so Should there not be mention on this page of dithering especially seeing as how its popularly used for sprite and pixel art with a constricted palette