The phase problem: Analysis of local extrema and image reconstruction algorithms
Autor: | S. D. Pol’skikh |
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Rok vydání: | 2008 |
Předmět: | |
Zdroj: | Journal of Communications Technology and Electronics. 53:208-221 |
ISSN: | 1555-6557 1064-2269 |
Popis: | Solution of the phase problem (reconstruction of the spectrum phase from the measured values of the spectrum amplitude) is considered from positions of global optimization. Local extrema (stagnation states of iterative procedures) are analyzed. It is shown that local image estimators are characterized by reconstruction of the low-frequency information, which is associated with the object position. An image-reconstruction strategy based on successive (iterative) refinement of the object position, which is the domain of attraction of the global extremum, is proposed. The results of numerical investigation of the proposed strategy are presented for the case of reconstruction of the image of a satellite model. |
Databáze: | OpenAIRE |
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