HALFTONING MYTHS AND REALITY. WHAT IS ADAPTIVE TO WHAT IN SCREENING?

Abstract

Halftone image quality is basically dependent on printing element area, form and placement geometry. So, the screening procedure has Always comprised the actual, cornerstone R&D issue of illustrative printing technology. The multiple of currently available, announced or upcoming screening techniques pretend on their practical use. At the same time, the screening technologies estimations are accompanied today by the number of misconceptions. Along with the importance and interest to this matter the great amount of “halftoning myths” does exist. They are herein below regarded in the light of several fundamental positions of halftone imaging and on the basis of myth/reality withstanding. Discussion is completed by overview and particular examples of the, so called, “adaptive” halftoning with an accent on proper defining the image local property for control the screening algorithm variation over a reproduced picture area.