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Proceedings Paper

Influence of dot structure on hardcopy MTF
Author(s): Sei-ichi Taguchi
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Paper Abstract

Black and white photographic film images consist of randomly located sdlver grains converted from photo-sensitive silver halide crystals as image recording unit, thus resulting in a granular structure from a microscopic viewpoint. In color photographic films, dye clouds are formed around developed silver halide grains. Such granular structures tend to provoke an impression of graininess and are known to further affect image sharpness' as well as bit capacity 2 ) The effect of the image structure on image sharpness also takes place in electronic still cameras using CCD image sensors though of course there is a clear difference in the regularity of imaging unit arrangement. It is thus of theoretical and practical importance to explicitly separate the two factors i.e., the optical and granular contributions influencing upon the image sharpness. The present paper proposes a new analyzing method of separating granular contribution and further characterizes typical imaging systems in terms of optical and granular contributions to their sharpnesses.

Paper Details

Date Published: 1 July 1990
PDF: 10 pages
Proc. SPIE 1253, Hard Copy and Printing Materials, Media, and Processes, (1 July 1990); doi: 10.1117/12.19836
Show Author Affiliations
Sei-ichi Taguchi, Fuji Photo Film Co., Ltd. (Japan)

Published in SPIE Proceedings Vol. 1253:
Hard Copy and Printing Materials, Media, and Processes
Joseph Gaynor, Editor(s)

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