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Showing 1 to 11 of 11 for “"Coded aperture imaging"”.
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Coded Aperture Imaging: Digital Decoding and Tomographic Artifacts
Made available in DSpace on 2014-12-12T20:54:34Z (GMT). No. of bitstreams: 1 7709189.pdf: 4576715 bytes, checksum: a01295fbefe6961b97ab6b87b5d1330d (MD5) Previous issue date: 1976
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Coded aperture imaging for fast neautron activation analysis
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1996, and Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
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Coded aperture imaging application in one-sided imaging of visually obscured objects
… and reveal their contents. However, traditional imaging techniques require a two-sided apparatus with a radiation source and a detector on opposite sides of the concealed object. One-sided imaging of concealed objects is made possible by a technique called backscatter imaging, utilizing high …
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Shape Dynamical Models for Activity Recognition and Coded Aperture Imaging for Light-Field Capture
… this dissertaion, we investigate computational imaging, an emerging field where the process of image formation involves the use of a computer. The current trend in computational imaging is to capture as much information about the scene as possible during capture time so that appropriate images …
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MOBILE, HYBRID COMPTON/CODED APERTURE IMAGING FOR DETECTION, IDENTIFICATION AND LOCALIZATION OF GAMMA-RAY SOURCES AT STAND-OFF DISTANCES
… truck-based, hybrid gamma-ray spectroscopic and imaging system able to quickly detect, identify and localize, radiation sources at standoff distances through improved sensitivity provided by multiple detection modes while minimizing the false alarm rate. Reconstruction of gamma-ray sources is …
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Detection of improvised explosive devices at long-range using coded aperture imaging of backscattered X-rays with dynamic reconstruction
… is to determine the feasibility of a large-area, Coded-Aperture Imaging (CAI) system using X-Ray backscatter as the source of radiation. A moving source-detector system required development of a new reconstruction technique, dynamic reconstruction (DR), which continually back-projects detected …
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Programmable Aperture Photography: An investigation into applications and methods
… photography are ever growing with new focuses on coded aperture imaging and its real-world applications. Research has shown that coded apertures are far superior to traditional circular apertures for various tasks. A variety of coded aperture patterns have been proposed and developed over the …
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Design of a near-field coded aperture cameras for high-resolution medical and industrial gamma-ray imaging
Coded Aperture Imaging is a technique originally developed for X-ray astronomy, where typical imaging problems are characterized by far-field geometry and an object made of point sources distributed over a mainly dark background. These conditions provide, respectively, the basis of artifact-free …
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GAMMA-RAY IMAGING OBSERVATIONS OF THE CRAB AND CYGNUS REGIONS
… keV to 9.3 MeV. It utilizes a technique known as coded aperture imaging in order to obtain spatially resolved images of the sky with an angular resolution of $3.8\sp\circ.$ This detector is the first flight-ready instrument of this type operating at energies above 160 keV. The first successful …
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Characterization and prototyping of the rotating modulator hard x-ray/gamma-ray telescope
… distances (100 m - 1 km). X-ray and gamma-ray imaging designs for astrophysics and security applications typically utilize a coded aperture imaging technique. The spatial resolution necessary, however, coupled with the specification of high sensitivity, requires a large number of readout …