Coded‐aperture x‐ or γ‐ray telescope with least‐squares image reconstruction. II. Computer simulation

1989 ◽  
Vol 60 (11) ◽  
pp. 3410-3420 ◽  
Author(s):  
Truman P. Kohman
Keyword(s):  
Computer Simulation ◽  
Image Reconstruction ◽  
Least Squares ◽  
Coded Aperture ◽  
Γ Ray

scholarly journals Gamma-Ray Imaging of the Galactic Center Region

1989 ◽  
Vol 136 ◽  
pp. 581-585
Author(s):  
W. R. Cook ◽  
D. M. Palmer ◽  
T. A. Prince ◽  
S. M. Schindler ◽  
C. H. Starr ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Galactic Center ◽  
Coded Aperture ◽  
Center Region ◽  
Gamma Ray Imaging ◽  
The Galaxy ◽  
Γ Ray ◽  
Luminous Objects

The Caltech imaging γ-ray telescope was launched by balloon from Alice Springs, NT, Australia and performed observations of the galactic center during the period 12.62 to 13.00 April 1988 UT. The first coded-aperture images of the galactic center region at energies above 30 keV show a single strong γ-ray source which is located 0.7±0.1° from the galactic nucleus and is tentatively identified as 1E1740.7-2942. If the source is at the distance of the galactic center, it is one of the most luminous objects in the galaxy at energies from 35 to 200 keV.

Gamma ray imaging using coded aperture masks: a computer simulation approach

1991 ◽  
Vol 30 (5) ◽  
pp. 549 ◽  
Author(s):  
J. Jimenez ◽  
Pedro Olmos ◽  
J. L. de Pablos ◽  
J. M. Perez
Keyword(s):  
Computer Simulation ◽  
Gamma Ray ◽  
Coded Aperture ◽  
Simulation Approach ◽  
Gamma Ray Imaging

Image Reconstruction on Quincunx Patterned Green Channel

2013 ◽  
Vol 717 ◽  
pp. 493-496
Author(s):  
Gwang Gil Jeon
Keyword(s):  
Image Reconstruction ◽  
Least Squares ◽  
Least Squares Method ◽  
Interpolation Method ◽  
Experimental Results ◽  
Color Filter ◽  
Image Artifacts ◽  
Green Channel ◽  
Filter Array ◽  
Single Sensor

This paper addresses the issue of the quincunx patterned green channel interpolation method that is obtained by single sensor cameras. Our goal is to reconstruct the green channel in Bayer color filter array (CFA) data. We present a new filter-based method for the reduction of image artifacts in green channel. To reconstruct green channel, we trained a filter using least squares method. Experimental results confirm the effectiveness of the proposed method. Compared to other bilinear and bicubic filters, the improvement in quality has been achieved.

The use of an active coded aperture for improved directional measurements in high energy γ-ray astronomy

1980 ◽  
Vol 27 (1) ◽  
pp. 375-380 ◽  
Author(s):  
A. Johansson ◽  
B. L. Beron ◽  
L. Campbell ◽  
R. Eichler ◽  
P. Gorodetsky ◽  
...  
Keyword(s):  
High Energy ◽  
Coded Aperture ◽  
Γ Ray
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