当前位置:首页>农业>【智慧农业】YOLO-Light-Pruned:基于近地面与无人机RGB影像的玉米苗数及叶龄监测轻量化模型

【智慧农业】YOLO-Light-Pruned:基于近地面与无人机RGB影像的玉米苗数及叶龄监测轻量化模型

  • 2026-07-02 10:04:28
【智慧农业】YOLO-Light-Pruned:基于近地面与无人机RGB影像的玉米苗数及叶龄监测轻量化模型

玉米苗数和叶龄是反映作物早期生长状况的重要指标,对于田间精准管理和育种材料筛选具有重要意义。然而,传统田间调查方法不仅耗时耗力,而且容易受到人为主观因素的影响。近年来,基于深度学习的目标检测模型在作物苗数统计领域受到广泛关注,但现有多数模型计算复杂度较高、部署成本较大,限制了其在实际农业生产中的应用。同时,针对田间环境下玉米叶龄监测的研究仍相对匮乏。为此,本研究提出了两种用于田间RGB图像中玉米苗数统计与叶龄监测的轻量化模型——YOLOv8n-Light-Pruned(YOLOv8n-LP)和YOLOv11n-Light-Pruned(YOLOv11n-LP)。该模型在YOLOv8n和YOLOv11n基础上进行了改进,引入了DAttention注意力机制、优化的双向特征金字塔网络(BiFPN)、EfficientHead检测头以及基于层自适应幅值的剪枝(Layer-Adaptive Magnitude-Based Pruning)策略。

结果表明,所提出模型在降低模型复杂度和提升运行效率方面取得了显著效果。模型参数量减少超过73%,推理效率根据不同计算设备性能提升最高可达42.9%。在玉米苗数统计任务中,两种模型均表现出较高精度,其中YOLOv8n-LP和YOLOv11n-LP的平均检测精度(AP)分别达到0.968和0.969,决定系数(R²)分别达到0.91和0.94,相对均方根误差(rRMSE)分别为6.73%和5.59%。与此同时,模型规模显著缩小,参数量仅为0.8 M和0.7 M,训练后模型文件大小分别仅为1.8 MB和1.7 MB。进一步的鲁棒性验证表明,该模型在不同叶龄阶段(rRMSE = 4.07%–7.27%)、不同图像分辨率(rRMSE = 3.06%–6.28%)、不同苗情组成(rRMSE = 1.09%–9.29%)以及不同种植密度条件(rRMSE = 3.38%–10.82%)下均能够保持稳定且可靠的性能。最后,通过融合植株计数与叶龄估计功能,所提出模型实现了玉米叶龄的精准监测。在近地面图像条件下,YOLOv8n-LP和YOLOv11n-LP的叶龄估测相对均方根误差分别为5.73%和7.54%;在无人机影像条件下,其相对均方根误差分别为9.24%和14.44%。

综上所述,所提出的轻量化模型在检测精度、部署效率以及复杂田间环境适应性方面均表现出优异性能,可为精准农业中的作物苗情监测、叶龄评估及智能田间管理提供可靠的技术支撑。

图1. 实验设计流程图

图2. 近地图像采集

图3. 无人机数据预处理

图4. YOLOv8n-LP的网络架构

图5. YOLOv11n-LP的网络架构

图6. 不同模型对玉米幼苗的检测准确率

图7. 玉米幼苗实测数量与估计数量的对比。(a)YOLOv8n-LP模型应用于NG数据。(b)YOLOv11n-LP模型应用于NG数据。(c)YOLOv8n-LP模型应用于无人机数据。(d)YOLOv11n-LP模型应用于无人机数据。

图8. 不同叶期(从左至右依次为V2、V3、V4和V5)的实测幼苗数量与估计幼苗数量的对比。(a-d)YOLOV8n-LP的结果。(e-h)YOLOV11n-LP的结果。

图9. 基于不同空间分辨率图像,使用YOLOv8n-LP(a-e)和YOLOv11n-LP(f-j)对实测幼苗数量与估计幼苗数量的比较。从左至右的分辨率分别为1.87毫米、2.21毫米、2.95毫米、3.40毫米和4.47毫米。

图10. 基于不同幼苗组成图像,YOLOv8n-LP(a-d)和YOLOv11n-LP(e-h)估算的幼苗数量与真实值的对比。从左至右,小幼苗的比例分别为0%、20%、40%和60%。

图11. 不同种植密度的样地中,YOLOv8n-LP(a)和YOLOv11n-LP(b)估算的幼苗数量与实际数量的对比。

图12. 单株水平叶片计数的评估

图13. 地块级叶片计数的混淆矩阵。

本文源自:扬州大学智慧农业研究院

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  1. CONNECT:[ UseTime:0.000965s ] mysql:host=127.0.0.1;port=3306;dbname=h_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001611s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.037632s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.003069s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001733s ]
  6. SELECT * FROM `set` [ RunTime:0.010640s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001647s ]
  8. SELECT * FROM `article` WHERE `id` = 546313 LIMIT 1 [ RunTime:0.008308s ]
  9. UPDATE `article` SET `lasttime` = 1783170835 WHERE `id` = 546313 [ RunTime:0.045540s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.077542s ]
  11. SELECT * FROM `article` WHERE `id` < 546313 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001947s ]
  12. SELECT * FROM `article` WHERE `id` > 546313 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.012732s ]
  13. SELECT * FROM `article` WHERE `id` < 546313 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.017394s ]
  14. SELECT * FROM `article` WHERE `id` < 546313 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.003856s ]
  15. SELECT * FROM `article` WHERE `id` < 546313 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.014991s ]
0.405477s