Designing halftoning dots has been done with fine craftsmanship and details about it have never been disclosed because the method is classified knowhow of the companies or the craftspersons up to now. At this time, the mathematical method to design halftoning dots without such craftsmanship, is invented and it is verified that the same halftoning dots like the dots offered by many prepress companies are designed only based on the parameters and equations. The main issues are (1) How to find out the shape of halftoning dot pattern and (2) How to number the pixels within the halftoning dot. In this paper, the algorithm about how to design the halftoning dots is made clear.
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