In this paper, we present a hybrid halftoning algorithm called clustered AM/FM halftoning. It is a generalization of the AM/FM halftoning algorithm developed by the authors earlier. With tone-dependent clustering strength control, the algorithm generates dispersed-dot halftone as error diffusion in highlight area and clustered-dot halftone similar to clustered-dot screen in mid-tone and shadow areas. The transition of the halftone texture is smooth. Moreover, the algorithm shows good Moiré resistence. There-fore, it may be especially suitable for such application as electro-photograpic multi-function printer.
Zhen He, Charles A. Bouman, "Clustered AM/FM Halftoning Algorithm" in Proc. IS&T Int'l Conf. on Digital Printing Technologies (NIP20), 2004, pp 627 - 631, https://doi.org/10.2352/ISSN.2169-4451.2004.20.1.art00025_2