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. 2020 Nov 25;20(23):6734. doi: 10.3390/s20236734

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Reconstructions from measurement data of aluminium specimen with side drilled holes. The reconstructions illustrate the performance of different compression matrix design approaches under heavy subsampling: (a) constant Rx spatial subsampling paired with max strategy, $N_{F} = 31$ , (b) varying Rx spatial subsampling with max strategy using $N_{F} = 31$ , (c) varying Rx spatial subsampling with energy based approach and $N_{F} = 31$ , (d) reference reconstruction using more channels and frequency samples for comparison.

Reconstructions from measurement data of aluminium specimen with side drilled holes. The reconstructions illustrate the performance of different compression matrix design approaches under heavy subsampling: (a) constant Rx spatial subsampling paired with max strategy, $N_{F} = 31$ , (b) varying Rx spatial subsampling with max strategy using $N_{F} = 31$ , (c) varying Rx spatial subsampling with energy based approach and $N_{F} = 31$ , (d) reference reconstruction using more channels and frequency samples for comparison.