Uniformly redundant arrays: digital reconstruction methods

Journal Article · Fri May 15 04:00:00 EDT 1981 · Appl. Opt.; (United States)

DOI:https://doi.org/10.1364/AO.20.001858· OSTI ID:6329809

Fenimore, E E; Cannon, T M

Several new digital reconstruction techniques for coded aperture imaging are developed which are especially applicable to uniformly redundant arrays (URAs). The techniques provide improved resolution without upsetting the artifact-free nature of URAs. Two new techniques are described; one which allows self-supporting URAs and one which avoids (or at least mitigates) a blur which has been associated with previous correlation analyses. Each of the methods and their resolution improvements are demonstrated with reconstructions of a laser-driven compression. Particular emphasis has been placed on the special sampling required of the encoded picture and the decoding function if artifacts are to be avoided. For large URAs, it is shown that another new digital technique, periodic decoding, is much faster. Periodic decoding does produce artifacts, but they usually are negligible.

• Research Organization: University of California, Los Alamos Scientific Laboratory, P.O. Box 1663, Los Alamos, New Mexico 87545
• OSTI ID: 6329809
• Journal Information: Appl. Opt.; (United States), Journal Name: Appl. Opt.; (United States) Vol. 20:10; ISSN APOPA
• Country of Publication: United States
• Language: English

Related Subjects

657005* -- Theoretical Physics-- Optics
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ARRAY PROCESSORS
DIGITAL SYSTEMS
ELECTROMAGNETIC RADIATION
IMAGES
IONIZING RADIATIONS
RADIATIONS
RESOLUTION
X RADIATION