- The technique that simulates continuous tone imagery through the use of dots, varying either in size or in spacing. “Halftone” can also be used to refer specifically to the image that is produced by this process. Where continuous tone imagery contains an infinite range of colors or grays (much like the human eye perceives the world), the halftone process reduces visual reproductions to an image that is printed with only one (or 4) colors of ink. This reproduction relies on a basic optical illusion—that these tiny dots are blended into smooth tones by the human eye. Color printing is made possible by repeating the halftone process for each of 4 colors—Cyan, Magenta, Yellow and Black. The semi-opaque property of ink allows halftone dots of different colors to create another optical effect—full-color imagery.
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