Abstract
Penumbral imaging is a technique for imaging of neutrons or other penetrating radiations. The technique uses the fact that spatial information can be recovered from the shadow or penumbra that an unknown source casts of a simple large circular aperture. The limitation is that the straightforward image reconstruction will introduce some significant distortion for a large field of view because of non-isoplanaticity of the aperture point spread function. In this paper, a genetic algorithm (GA) is proposed for reconstruction of penumbral images and the technique allows distortion-free reconstruction over a large field of view. Furthermore, because in GA the complicateda priori constraints can be easily incorporated by appropriate modification of the cost function, the algorithm is also very tolerant of the noise.
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References
K.A. Nugent and B. Luther-Davies: Opt. Commun.49 (1984) 393.
H.H. Barrett and W. Swindell:Radiological Imaging (Academic, New York, 1981).
Y.-W. Chen, N. Miyanaga, M. Yamanaka, H. Azechi, S. Ishikawa, T. Yamanaka, S. Nakai and S. Tamura: Opt. Commun.73 (1989) 337.
D. Ress, R.A. Lerche, R.J. Ellis, S.M. Lane and K.A. Nugent: Science241 (1988) 956.
Y.-W. Chen, N. Miyanaga, M. Yamanaka, T. Yamanaka, S. Nakai, T. Iguchi, M. Nakazawa, T. Iida and S. Tamura: IEICE Trans. Electron.E78-C (1995) 1787.
D. Ress:Proc. of 1989 IEEE Nuclear Science Symposium (USA, 1989).
Y.-W. Chen, Z. Nakao and I. Nakamura: IEICE Trans. Electron.E80-C (1997) 346.
Z. Michalewics:Genetic Algorithms+Data Structures=Evolution Programs (Springer-Verlag, Berlin, 1992).
K. Takazu, H. Sawai, S. Watanabe and M. Yonayama: IEICE Trans.J77-D-II (1994) 1168.
Y.-W. Chen, Z. Nakao, M. Iguchi and S. Tamura:Proc. of IEEE Int. Conf. on Neural Networks and Signal Processing (Nanjin, China, 1995) p. 1366.
Z. Nakao, Y.-W. Chen and F. Ali: J. Jpn. Soc. Fuzzy Theory Syst.8 (1996) 687.
H. Kitano:Genetic Algorithms (Sankyo-Tosyo, Tokyo, 1993).
A. Rosenfeld and A.C. Kak:Digital Picture Processing (Academic Press, New York, 1982) 2nd ed.
Y.-W. Chen, Z. Nakao and X. Fang:Neural Networks for Signal Processing VI, eds. S. Usuiet al. (IEEE Press, New York, 1996) p. 694.
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Chen, YW., Nakao, Z. & Arakaki, K. Genetic algorithms applied to neutron penumbral imaging. Optical Review 4, 209–215 (1997). https://doi.org/10.1007/BF02931683
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DOI: https://doi.org/10.1007/BF02931683