ABSTRACT
This chapter discusses a general framework for color halftoning with green-noise that not only regulates the clustering of dots within a specific color or channel, but also regulates the amount of clustering across channels. Printers can, therefore, be tuned to either increase or decrease the amount of dot overlap between dots of different colors. Just as green-noise has been tuned to the constraints of the printed dot in monochrome halftoning, green-noise can also be tuned to the constraints of the printed dots in color halftoning. A major advantage of using stochastic halftoning techniques such as blue-noise over amplitude modulated halftoning is the absence of moiré when superimposing the halftone patterns of cyan, magenta, yellow, and black – eliminating the need for screen angles and screen rulings. Through the use of a green-noise mask, halftoning can create a stochastic patterning of dots with adjustable coarseness but with the same computational freedom as ordered-dither halftoning schemes.
