Screening and Moiré Suppression in Printing and Its Analysis by Fourier Transform

Autor:	Yasuyuki Seguchi, Masao Okada, Yoshiharu Morimoto
Rok vydání:	1990
Předmět:	Halftone business.industry Image processing Moiré pattern Theoretical Computer Science Power (physics) symbols.namesake Optics Fourier transform Computational Theory and Mathematics Hardware and Architecture Aliasing Human visual system model symbols Dither business Information Systems Mathematics
Zdroj:	Systems and Computers in Japan. 21:98-106
ISSN:	1520-684X 0882-1666
Popis:	Moire patterns are often observed in printing when the image is reproduced as a bilevel image with halftone. A Fourier transform analysis of screening a picture by an optical method or an ordered dither method is presented. Conventional moire—suppressing techniques are discussed considering the human visual system. The moire fringes are explained as aliasing and visible moire fringes are especially due to high-frequency spectra with high power. From this viewpoint, a screening method is proposed which uses the Fourier transform for moire suppression. This method has the additional advantage that any pitch and any screen angle may be selected.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::098d425db16f77175b8325cf3329d48e https://doi.org/10.1002/scj.4690210210 Zobrazit plný text záznamu Plný text