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• W2970296650 abstract "We consider a problem that recovers a 2-D object and the underlying view angle distribution from its noisy projection tilt series taken at unknown view angles. Traditional approaches rely on the estimation of the view angles of the projections, which do not scale well with the sample size and are sensitive to noise. We introduce a new approach using the moment features to simultaneously recover the underlying object and the distribution of view angles. This problem is formulated as constrained nonlinear least squares in terms of the truncated Fourier-Bessel expansion coefficients of the object and is solved by a new alternating direction method of multipliers (ADMM)-based algorithm. Our numerical experiments show that the new approach outperforms the expectation maximization (EM)-based maximum marginalized likelihood estimation in efficiency and accuracy. Furthermore, the hybrid method that uses EM to refine ADMM solution achieves the best performance." @default.
• W2970296650 created "2019-09-05" @default.
• W2970296650 creator A5010277466 @default.
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• W2970296650 date "2019-09-01" @default.
• W2970296650 modified "2023-09-26" @default.
• W2970296650 title "Two-Dimensional Tomography from Noisy Projection Tilt Series Taken at Unknown View Angles with Non-Uniform Distributi" @default.
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• W2970296650 doi "https://doi.org/10.1109/icip.2019.8803755" @default.
• W2970296650 hasPublicationYear "2019" @default.
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