A Comparative Benchmark of Real-time Detectors for Blueberry Detection towards Precision Orchard Management

• URL: http://arxiv.org/abs/2509.20580v2
• Date: Sat, 04 Oct 2025 18:40:50 GMT
• Title: A Comparative Benchmark of Real-time Detectors for Blueberry Detection towards Precision Orchard Management
• Authors: Xinyang Mu, Yuzhen Lu, Boyang Deng,
• Abstract summary: This study presents a novel comparative benchmark analysis of advanced real-time object detectors.<n>This dataset comprises 661 canopy images collected with smartphones during the 2022-2023 seasons.<n>Among the YOLO models, YOLOv12m achieved the best accuracy with a mAP@50 of 93.3%.
• Score: 2.667064587590596
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: Blueberry detection in natural environments remains challenging due to variable lighting, occlusions, and motion blur due to environmental factors and imaging devices. Deep learning-based object detectors promise to address these challenges, but they demand a large-scale, diverse dataset that captures the real-world complexities. Moreover, deploying these models in practical scenarios often requires the right accuracy/speed/memory trade-off in model selection. This study presents a novel comparative benchmark analysis of advanced real-time object detectors, including YOLO (You Only Look Once) (v8-v12) and RT-DETR (Real-Time Detection Transformers) (v1-v2) families, consisting of 36 model variants, evaluated on a newly curated dataset for blueberry detection. This dataset comprises 661 canopy images collected with smartphones during the 2022-2023 seasons, consisting of 85,879 labelled instances (including 36,256 ripe and 49,623 unripe blueberries) across a wide range of lighting conditions, occlusions, and fruit maturity stages. Among the YOLO models, YOLOv12m achieved the best accuracy with a mAP@50 of 93.3%, while RT-DETRv2-X obtained a mAP@50 of 93.6%, the highest among all the RT-DETR variants. The inference time varied with the model scale and complexity, and the mid-sized models appeared to offer a good accuracy-speed balance. To further enhance detection performance, all the models were fine-tuned using Unbiased Mean Teacher-based semi-supervised learning (SSL) on a separate set of 1,035 unlabeled images acquired by a ground-based machine vision platform in 2024. This resulted in accuracy gains ranging from -1.4% to 2.9%, with RT-DETR-v2-X achieving the best mAP@50 of 94.8%. More in-depth research into SSL is needed to better leverage cross-domain unlabeled data. Both the dataset and software programs of this study are made publicly available to support further research.

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