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• W2899809728 abstract "In this paper, we present an algorithm for effectively reconstructing an object from a set of its tomographic projections without any knowledge of the viewing directions or any prior structural information, in the presence of pathological amounts of noise, unknown shifts in the projections, and outliers among the projections. The outliers are mainly in the form of a number of projections of a completely different object, as compared to the object of interest. We introduce a novel approach of first processing the projections, then obtaining an initial estimate for the orientations and the shifts, and then define a refinement procedure to obtain the final reconstruction. Even in the presence of high noise variance (up to $50%$ of the average value of the (noiseless) projections) and presence of outliers, we are able to successfully reconstruct the object. We also provide interesting empirical comparisons of our method with the sparsity based optimization procedures that have been used earlier for image reconstruction tasks." @default.
• W2899809728 created "2018-11-16" @default.
• W2899809728 creator A5072824358 @default.
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• W2899809728 date "2018-11-12" @default.
• W2899809728 modified "2023-09-27" @default.
• W2899809728 title "Noise- and Outlier-Resistant Tomographic Reconstruction under Unknown Viewing Parameters" @default.
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• W2899809728 hasPublicationYear "2018" @default.
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