Recovering fine details from under-resolved electron tomography data using higher order total variation ℓ1 regularization
- Arizona State Univ., Tempe, AZ (United States). School of Mathematical and Statistical Sciences
- Dartmouth College, Hanover, NH (United States). Department of Mathematics
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Fundamental and Computational Sciences Directorate
- Lehigh Univ., Bethlehem, PA (United States). Department of Chemistry
Over the last decade or so, reconstruction methods using ℓ1 regularization, often categorized as compressed sensing (CS) algorithms, have significantly improved the capabilities of high fidelity imaging in electron tomography. The most popular ℓ1 regularization approach within electron tomography has been total variation (TV) regularization. In addition to reducing unwanted noise, TV regularization encourages a piecewise constant solution with sparse boundary regions. In this paper we propose an alternative ℓ1 regularization approach for electron tomography based on higher order total variation (HOTV). Like TV, the HOTV approach promotes solutions with sparse boundary regions. In smooth regions however, the solution is not limited to piecewise constant behavior. We demonstrate that this allows for more accurate reconstruction of a broader class of images – even those for which TV was designed for – particularly when dealing with pragmatic tomographic sampling patterns and very fine image features. In conclusion, we develop results for an electron tomography data set as well as a phantom example, and we also make comparisons with discrete tomography approaches.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1341752
- Report Number(s):
- PNNL-SA-123416; PII: S0304399116301474
- Journal Information:
- Ultramicroscopy, Vol. 174; ISSN 0304-3991
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Reconstruction of catadioptric omnidirectional images using dual alternating total variation minimization
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journal | November 2018 |
Multiscale higher-order TV operators for L1 regularization
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journal | October 2018 |
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