Coded aperture imaging with uniformly redundant arrays.

  title={Coded aperture imaging with uniformly redundant arrays.},
  author={Edward E. Fenimore and T. Michael Cannon},
  journal={Applied optics},
  volume={17 3},
Uniformly redundant arrays (URA) have autocorrelation functions with perfectly flat sidelobes. The URA combines the high-transmission characteristics of the random array with the flat sidelobe advantage of the nonredundant pinhole arrays. This gives the URA the capability to image low-intensity, low-contrast sources. Furthermore, whereas the inherent noise in random array imaging puts a limit on the obtainable SNR, the URA has no such limit. Computer simulations show that the URA with… 

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  • Computer Science
  • 1998
A survey of all currently known construction methods for URA’s is given and the sizes and open fractions of the arrays resulting from each construction method are pointed out.

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A modified uniform redundant-array configuration suitable for portable and small-size gamma cameras is presented and its ability to reconstruct the image of several sources is analyzed.

Pattern design and imaging methods in 3-D coded aperture techniques

  • L. ZhangBerthold K. P. HornR. Lanza
  • Physics
    1998 IEEE Nuclear Science Symposium Conference Record. 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference (Cat. No.98CH36255)
  • 1998
The authors have conducted research on coded aperture patterns composed of cyclic difference set uniformly redundant arrays (URA) such that the system point-spread-function is a delta function and no

Analysis and Optimization of Aperture Design in Computational Imaging

It is shown that when SNR is high and thermal noise dominates shot noise, spectrally-flat masks are optimal, but that when shot noise dominates thermal noise, randomly generated masks with lower transmissivity offer greater performance.

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  • K. Ziock
  • Physics
    SPIE Optics + Photonics
  • 2004
Coded aperture imagers provide the optimum means to generate an all-sky survey at gamma-ray energies from 10's of keV to a few MeV. Unfortunately, such imagers are plagued by systematic noise that

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Four experiments were conducted to investigate the amount of noise reduction provided by coded apertures when used in photographic cameras, focusing on the effects of coding mask sizes, positioning, mosaicing and rotation.



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A best linear decoding of the coded image is presented and its superiority over the conventional matched filter decoding is shown.

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The general theory of coded-aperture imaging is presented, first for an arbitrary code and then for an on-axis zone plate, an off-axis Zone Plate, and a one-dimensional zone plate (or linear chirp).

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When making photographs in x rays or γ rays with a multiple‐pinhole camera, the individual images of an extended object such as the sun may be allowed to overlap; then the situation is in many ways

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A scatter‐hole x‐ray camera has been designed and flown in a rocket to measure solar x radiation. Its distinguishing feature is that many single pin‐hole images are allowed to overlap—a multiplexing

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A simple description of pseudo-random sequences, or maximal-length shift-register sequences, and two-dimensional arrays of area n = 2lm- 1 with the same property.