Uniformly redundant arrays

Conference · Sat Jan 01 04:00:00 EST 1977

OSTI ID:5259442

Fenimore, E E; Cannon, T M

A recent development in coded aperture imaging removed the basic limitation on the quality of the reconstructed images when a correlation analysis is used. A pattern of holes for the aperture was designed that has an autocorrelation that is perfectly flat. The pattern is referred to as a uniformly redundant array (URA) and combines the high-transmission characteristics of the random arrays and Fresnel zone plate with the flat sidelobe advantage of the nonredundant pinhole array. An analysis procedure was developed (balanced correlation) that, when combined with the URA, gives a system point-spread function which is exactly a delta function. Computer simulations were used to demonstrate that, with random arrays, the balanced correlation is able to improve the reconstructed images by orders of magnitude. Additional orders of magnitude improvement are possible if the URA pattern is used. 6 figures.

• Research Organization: Los Alamos Scientific Lab., N.Mex. (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5259442
• Report Number(s): LA-UR-77-2683; CONF-771206-22
• Country of Publication: United States
• Language: English

Related Subjects

99 GENERAL AND MISCELLANEOUS
990200* -- Mathematics & Computers
ALGORITHMS
CORRELATIONS
IMAGE PROCESSING
MATHEMATICAL LOGIC
NOISE
SIGNALS
SIMULATION