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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/).
Improved YOLOv7 network structure diagram. P1, P2, P3, P4 and P5 represent different levels of the feature pyramid. I and II represent the two locations where the attention mechanism is added.