Abstract

The halftone technique, which converts a continuous-tone picture into a binary image, is examined. A halftone screen function is used to specify configurations of binary image elements; their area determines the local average image irradiance and information about the spatial image irradiance variations is relfected in their boundaries. A halftone ring geometry is suggested to improve spatial image resolution. Experiments are reported to verify this prediction.

© 1978 Optical Society of America

Tone Reproduction in the “Halftone” Photo-Engraving Process

Herbert E. Ives
J. Opt. Soc. Am. 13(5) 537-552 (1926)

Analysis of halftone dot profile and aliasing in the discrete binary representation of images*

J. P. Allebach and B. Liu
J. Opt. Soc. Am. 67(9) 1147-1154 (1977)

Halftone method with edge enhancement and Moiré suppression

Paul G. Roetling
J. Opt. Soc. Am. 66(10) 985-989 (1976)

Fourier spectrum of halftone images

D. Kermisch and P. G. Roetling
J. Opt. Soc. Am. 65(6) 716-723 (1975)

Characterizing halftone noise: a technique

F. R. Ruckdeschel, A. M. Walsh, O. G. Hauser, and C. Stephan
Appl. Opt. 17(24) 3999-4002 (1978)