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Proceedings Paper

Sampling artifacts, system design, and image processing
Author(s): Gerald C. Holst
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Paper Abstract

Imaging system resolution depends upon Fλ/d where F is the focal ratio, λ is the wavelength, and d is the detector size. Assuming a 100% fill factor, no aliasing occurs when Fλ/d ≥ 2. However, sampling artifacts are quite acceptable and most systems have Fλ/d < 1. Sampling artifacts are most noticeable with periodic targets (bar patterns, picket fences, plowed fields, etc). Since real targets are aperiodic, the sampling theorem (frequency domain analysis) does not directly provide guidance in algorithm development. Sampling creates an edge location ambiguity of one pixel. Phasing effects and edge ambiguity are often overlooked when designing image processing algorithms.

Paper Details

Date Published: 26 September 2007
PDF: 7 pages
Proc. SPIE 6712, Unconventional Imaging III, 67120C (26 September 2007); doi: 10.1117/12.747757
Show Author Affiliations
Gerald C. Holst, JCD Publishing (United States)

Published in SPIE Proceedings Vol. 6712:
Unconventional Imaging III
Jean J. Dolne; Victor L. Gamiz; Paul S. Idell, Editor(s)

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