Semi-Supervised Weed Detection in Vegetable Fields: In-domain and Cross-domain Experiments

• URL: http://arxiv.org/abs/2502.17673v1
• Date: Mon, 24 Feb 2025 21:39:47 GMT
• Title: Semi-Supervised Weed Detection in Vegetable Fields: In-domain and Cross-domain Experiments
• Abstract summary: This study introduces semi-supervised object detection (SSOD) methods for leveraging unlabeled data for enhanced weed detection.<n>An experimental comparison of four SSOD methods, including three existing frameworks, was conducted for weed detection in both in-domain and cross-domain contexts.<n>The YOLOv8-based WeedTeacher achieved the highest accuracy among all four methods, with an improvement of 2.6% mAP@50 and 3.1% mAP@50:95 over its supervised baseline.
• Score: 5.840507501444088
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: Robust weed detection remains a challenging task in precision weeding, requiring not only potent weed detection models but also large-scale, labeled data. However, the labeled data adequate for model training is practically difficult to come by due to the time-consuming, labor-intensive process that requires specialized expertise to recognize plant species. This study introduces semi-supervised object detection (SSOD) methods for leveraging unlabeled data for enhanced weed detection and proposes a new YOLOv8-based SSOD method, i.e., WeedTeacher. An experimental comparison of four SSOD methods, including three existing frameworks (i.e., DenseTeacher, EfficientTeacher, and SmallTeacher) and WeedTeacher, alongside fully supervised baselines, was conducted for weed detection in both in-domain and cross-domain contexts. A new, diverse weed dataset was created as the testbed, comprising a total of 19,931 field images from two differing domains, including 8,435 labeled (basic-domain) images acquired by handholding devices from 2021 to 2023 and 11,496 unlabeled (new-domain) images acquired by a ground-based mobile platform in 2024. The in-domain experiment with models trained using 10% of the labeled, basic-domain images and tested on the remaining 90% of the data, showed that the YOLOv8-basedWeedTeacher achieved the highest accuracy among all four SSOD methods, with an improvement of 2.6% mAP@50 and 3.1% mAP@50:95 over its supervised baseline (i.e., YOLOv8l). In the cross-domain experiment where the unlabeled new-domain data was incorporated, all four SSOD methods, however, resulted in no or limited improvements over their supervised counterparts. Research is needed to address the difficulty of cross-domain data utilization for robust weed detection.

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