Journal ArticleDOI
Coded aperture imaging with multiple measurements
TLDR
In this article, a general theory of coded aperture imaging with multiple measurements is presented, and an image reconstruction scheme from the coded images is described that results in a maximum signal-to-noise ratio.Abstract:
In coded aperture imaging, only aperture arrays consisting of (0, 1) elements are physically realizable. If multiple coded images are obtained with different aperture masks and the resulting detector images are suitably combined, a larger variety of aperture arrays, such as multilevel, complex-valued, vector-valued, or complementary arrays becomes applicable. We present a general theory of coded aperture imaging with multiple measurements. An image reconstruction scheme from the coded images is described that results in a maximum signal-to-noise ratio. Also, the design of sets of aperture arrays is addressed and explicitly solved for several important cases. It is shown how known classes of correlation arrays can be beneficially applied to coded aperture imaging.read more
Citations
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References
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Journal ArticleDOI
Imaging with coded-aperture masks
TL;DR: In this paper, a variety of instruments results from selecting different coding patterns and from simple geometrical variations on this theme and various schemes which have been proposed and used and the methods of interpreting the data obtained with them are reniewed and compared.
Journal ArticleDOI
Sets of One and Higher Dimensional Welti Codes and Complementary Codes
TL;DR: Methods for synthesizing sets of one-dimensional Welti codes with vanishing cross-correlation functions, and conditions upon their existence are discussed, and construction methods of sets of two and higher dimensional WeltI codes are presented.
Journal ArticleDOI
Gamma-Ray Imaging with a Rotating Hexagonal Uniformly Redundant Array
TL;DR: In this article, the authors used a NaI Anger camera and a rotating coded aperture mask to demonstrate the capabilities of a?-ray imaging system employing a new type of hexagonal uniformly redundant array, which is essentially antisymmetric under 60° rotation.
Journal ArticleDOI
Coded aperture imaging: the modulation transfer function for uniformly redundant arrays.
TL;DR: The modulation transfer function (MTF) of such a system employing uniformly redundant arrays (URA) is derived and it is shown that the MTF of a URA system is virtually the same as the M TF of an individual pinhole regardless of the shape or size of the pinhole.
Journal ArticleDOI
Multiplex imaging with multiple-pinhole cameras
TL;DR: In this article, the advantages and problems arising with such a camera are discussed, and expressions are derived to describe the relative efficacy of three exposure/postprocessing schemes using multiple-pinhole cameras.