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- W1985508082 abstract "An information divergence, such as Shannon mutual information, measures the distance between two probability-density functions (or images). A wide class of such measures, called α divergences, with desirable properties such as convexity over all space, was defined by Amari. Rényi’s information Dα is an α divergence. Because of its convexity property, the minimum of Dα is easily attained. Minimization accomplishes minimum distance (maximum resemblance) between an unknown image and a known reference image. Such a biasing effect permits complex images, such as occur in inverse synthetic-aperture-radar imaging, to be well reconstructed. The algorithm permits complex amplitudes to replace the probabilities in the Rényi form. The bias image may be constructed as a smooth version of the linear, Fourier reconstruction of the data. Examples on simulated complex image data with and without noise indicate that the Rényi reconstruction approach permits superresolution in low-noise cases and higher fidelity than ordinary, linear reconstructions in higher-noise cases." @default.
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- W1985508082 date "1995-07-10" @default.
- W1985508082 modified "2023-09-25" @default.
- W1985508082 title "Reconstruction of complex signals using minimum Rényi information" @default.
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- W1985508082 doi "https://doi.org/10.1364/ao.34.004086" @default.
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