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Proceedings Paper

Synthesis Of Nonlinear Non-Monotonic Functions In Optical Image Processing
Author(s): S. R. Dashiell; A. A. Sawchuk
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Paper Abstract

When halftone screens are used to realize monotonic or non-monotonic nonlinear point transfer functions in a coherent optical system, the screens are usually composed of periodically repeated cells which are themselves monotonic in density. This is not necessary, and an algorithm for generating non-monotonic cells yielding a desired transfer function in the first diffraction order is described. In practice, the photographic operations are non-ideal and change the nonlinear characteristics from input to output. The effects of low film gamma and low film saturation density can be calculated, and, to some extent, compensated a priori.

Paper Details

Date Published: 9 July 1976
PDF: 7 pages
Proc. SPIE 0074, Image Processing, (9 July 1976); doi: 10.1117/12.954704
Show Author Affiliations
S. R. Dashiell, University of Southern California (United States)
A. A. Sawchuk, University of Southern California (United States)


Published in SPIE Proceedings Vol. 0074:
Image Processing
John C. Urbach, Editor(s)

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