There is no doubt that printing has been one of the most important technological inventions for
human civilization. Books, magazines, news papers, and so on have been printed for different
purposes such as distributing knowledge, thoughts, and news and commercializing products.
Tone reproduction for images has been one of the challenging parts of the printing technology
because the printing devices are restricted to a few color inks, whereas the original image
may consist of millions of color tones. In this chapter, the basics of the tone reproduction
are introduced. We begin with a brief history of halftoning and a short introduction of digitalization.
It is followed by the description on visual acuity of human visual system and its
relationship with the screen resolution. Then the basic and general concepts of tone reproduction,
such as screen frequency, print resolution, screen angle and Moiré pattern, and dot gain
are described and illustrated. Dot gain is only briefl y described and illustrated in this chapter as
it is thoroughly discussed in Physical Evaluation of the Quality of Color Halftone . Finally,
technologies for color reproduction and color halftoning are discussed.
Wiley , 2015.