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. 2023 Oct 18;23(20):8566. doi: 10.3390/s23208566

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© 2023 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 (https://creativecommons.org/licenses/by/4.0/).

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The different image pairs after bi-directional matching according to two strategies: (a) roads; (b) buildings; (c) farmlands; (d) forests. The corresponding points are connected by red lines.

The different image pairs after bi-directional matching according to two strategies: (a) roads; (b) buildings; (c) farmlands; (d) forests. The corresponding points are connected by red lines.