On Phase Correction in Tomographic Research
| Autor: | Anatoly G. Yagola, Alexander S. Leonov, Ya. Wang, Dmitry Lukyanenko, V. D. Shinkarev |
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| Rok vydání: | 2020 |
| Předmět: |
Applied Mathematics
Numerical analysis Mathematical analysis Phase distortion 02 engineering and technology 01 natural sciences Regularization (mathematics) Industrial and Manufacturing Engineering 010101 applied mathematics 020303 mechanical engineering & transports 0203 mechanical engineering Bounded function Piecewise Tomography Boundary value problem 0101 mathematics Intensity (heat transfer) Mathematics |
| Zdroj: | Journal of Applied and Industrial Mathematics. 14:802-810 |
| ISSN: | 1990-4797 1990-4789 |
| DOI: | 10.1134/s1990478920040171 |
| Popis: | Under consideration is the problem of improving the contrast of the image obtained by processing tomographic projections with phase distortion. The study is based on the well-known intensity transfer equation. Unlike other works, this equation is solved in a bounded region of variation of the tomographic parameters. In a domain, a boundary value problem is posed for the intensity transfer equation which is then specialized for a three-dimensional parallel tomographic scheme. The case of two-dimensional tomography is also considered, together with the corresponding boundary value problem for the intensity transfer equation. We propose numerical methods for solving the boundary value problems of phase correction. The results are given of the numerical experiments on correction of tomographic projections and reconstruction of the structure of the objects under study (in particular, a slice of a geological sample) by using piecewise uniform regularization. |
| Databáze: | OpenAIRE |
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