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Creators/Authors contains: "Zehni, Mona"

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  1. ; ; ; (, SIAM Journal on Imaging Sciences)
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  2. ; (, International Conference on Acoustics, Speech, and Signal Processing (ICASSP))
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  3. ; (, IEEE Transactions on Computational Imaging)
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  4. ; (, 2021 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP))
    null (Ed.)
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  5. ; (, 2021 IEEE 18th International Symposium on Biomedical Imaging)
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  6. ; ; ; ; ; ; (, SIGIR '21: Proceedings of the 44th International ACM SIGIR Conference on Research and Development in Information Retrieval)
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  7. ; ; ; (, IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP))
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  8. ; ; ; ; (, IEEE Transactions on Image Processing)
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  9. ; ; ; (, ICASSP 2019 - 2019 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP))
    In this paper, we study a 2D tomography problem for point source models with random unknown view angles. Rather than recovering the projection angles, we reconstruct the model through a set of rotation-invariant features that are estimated from the projection data. For a point source model, we show that these features reveal geometric information about the model such as the radial and pairwise distances. This establishes a connection between unknown view tomography and unassigned distance geometry problem (uDGP). We propose new methods to extract the distances and approximate the pairwise distance distribution of the underlying points. We then use the recovered distribution to estimate the locations of the points through constrained non-convex optimization. Our simulation results show that our point source reconstruction pipeline is robust to noise and outperforms the regularized expectation maximization (EM) baseline. 
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