Journal ArticleDOI
Fast decoding algorithm for uniformly redundant arrays.
TLDR
For quadratic residue arrays (uniformly redundant arrays-URAs), this work has developed fast deconvolution algorithms based on conventional decoding methods but taking advantage of the mathematical properties of the decoding matrices.Abstract:
Coded mask aperture imaging techniques are now used in various fields, in particular in x-ray and gamma-ray astronomy. With such systems it is possible to construct apertures which have autocorrelation functions with perfectly flat sidelobes. For quadratic residue arrays (uniformly redundant arrays—URAs), we have developed fast deconvolution algorithms based on conventional decoding methods but taking advantage of the mathematical properties of the decoding matrices. Balanced decoding, delta decoding, and finely sampled decoding are discussed.read more
Citations
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Journal ArticleDOI
New family of binary arrays for coded aperture imaging
TL;DR: With the addition of MURAs to the family of binary arrays, all prime numbers can now be used for making optimal coded apertures, increasing the number of available square patterns by more than a factor of 3.
Patent
Coded aperture imaging
TL;DR: In this paper, a coded aperture imaging apparatus and methods for the detection and imaging of radiation which results from nuclear interrogation of a target object is presented. But the method is not suitable for the handling of large objects.
Journal ArticleDOI
The SIGMA/Granat Telescope: Calibration and Data Reduction
TL;DR: The SIGMA Telescope as discussed by the authors was a French experiment, designed to provide high-resolution images in the hard X-ray and soft γ-ray band (35-1300 keV).
Journal ArticleDOI
Flight performance of an advanced CZT imaging detector in a balloon-borne wide-field hard X-ray telescope—ProtoEXIST1
Jongsuk Hong,B. Allen,J. E. Grindlay,S. Barthelemy,Robert G. Baker,A. Garson,Henric Krawczynski,Jeff Apple,W.H. Cleveland +8 more
TL;DR: The first high-altitude balloon flight of a wide-field hard X-ray coded-aperture telescope ProtoEXIST1, which was launched from the Columbia Scientific Balloon Facility at Ft. Sumner, New Mexico on October 9, 2009, was reported in this paper.
Journal ArticleDOI
Imaging techniques applied to the coded mask SIGMA telescope
TL;DR: In this paper, the authors describe the SIGMA imaging system and review the standard image reconstruction techniques and analysis procedures applied to the data collected by the French soft gamma-ray telescope SIGMA.
References
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PatentDOI
Coded aperture imaging with uniformly redundant arrays
E. E. Fenimore,Thomas M. Cannon +1 more
TL;DR: Computer simulations show that the URA with significant shot and background noise is vastly superior to random array techniques without noise, and permits a detector which is smaller than its random array counterpart.
Journal ArticleDOI
Uniformly redundant arrays: digital reconstruction methods
E. E. Fenimore,T. M. Cannon +1 more
TL;DR: Several new digital reconstruction techniques for coded aperture imaging are developed which are especially applicable to uniformly redundant arrays (URAs), and it is shown that another new digital technique, periodic decoding, is much faster.