Journal ArticleDOI
Multiplex imaging with multiple-pinhole cameras
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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.Abstract:
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 analogous to that in a multiplexing device such as a Fourier spectroscope. Some advantages and problems arising with such use of the camera are discussed, and expressions are derived to describe the relative efficacy of three exposure/postprocessing schemes using multiple‐pinhole cameras.read more
Citations
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Proceedings ArticleDOI
Range estimation based on multiple imaging
TL;DR: Since only a single compact camera is used, the need for extrinsic camera calibration is avoided, greatly reduced the computational demanding of correspondence problem and the use of refractive element, prism array, instead of pinhole array, can greatly increase the light transmission and the resolution of images.
Journal ArticleDOI
Unbiased and biased estimators in coded aperture imaging for far field standoff detection at low count rates.
TL;DR: It is shown that the unbiased mean estimator from Fenimore's balanced convolution method is a special case of the general conditions and a practical example of designing restoring arrays for a coded aperture system with a random mask.
Point spread functions of integral-code measurement systems with multiple-pinhole hexagonal coding collimators ionizing radiation measurements
TL;DR: In this article, the tomographic properties of integral-code (multiplexed) measurement systems with multiple-pinhole hexagonal coding collimators are investigated, and it is established that systems designed on the basis of nonextended classical pseudorandom sequences possess the best point spread functions (PSF).
Proceedings ArticleDOI
Iterative Deconvolution for Multidimensional Signals
TL;DR: In this article, a new method for deconvolution of two multi-dimensional discrete signals is proposed to recover the original source intended for capture, which has been verified using two and three dimensional matrices and has been thus extended for m-dimensional signals.
References
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Journal ArticleDOI
Fourier transform photography: a new method for X-ray astronomy
TL;DR: In this paper, a pinhole camera with resolutions better than 10−3 rad is presented. But the apertures are very small, not greater than about 10−4 cm2.
Journal ArticleDOI
On the synthesis of two-dimensional arrays with desirable correlation properties
Domenick Calabro,Jack K. Wolf +1 more
TL;DR: This paper considers the synthesis of two-dimensional, periodic, binary and nonbinary sequences (arrays) which exhibit similar properties for their two- dimensional autocorrelation functions and methods of constructing arrays based upon good one-dimensional sequences.