Automatic rape flower cluster counting method based on low-cost labelling and UAV-RGB images

文献类型： 外文期刊

第一作者： Li, Jie

作者： Li, Jie;Wang, Enguo;Li, Yi;Qiao, Jiangwei;Li, Li;Yao, Jian;Liao, Guisheng

作者机构：

关键词： Rape flower clusters; Pyramidal convolution; Attention mechanism; Bayesian loss

期刊名称：PLANT METHODS （ 影响因子：5.1； 五年影响因子：6.1 ）

ISSN：

年卷期： 2023 年 19 卷 1 期

页码：

收录情况： SCI

摘要： Background The flowering period is a critical time for the growth of rape plants. Counting rape flower clusters can help farmers to predict the yield information of the corresponding rape fields. However, counting in-field is a time-consuming and labor-intensive task. To address this, we explored a deep learning counting method based on unmanned aircraft vehicle (UAV). The proposed method developed the in-field counting of rape flower clusters as a density estimation problem. It is different from the object detection method of counting the bounding boxes. The crucial step of the density map estimation using deep learning is to train a deep neural network that maps from an input image to the corresponding annotated density map.Results We explored a rape flower cluster counting network series: RapeNet and RapeNet+. A rectangular box labeling-based rape flower clusters dataset (RFRB) and a centroid labeling-based rape flower clusters dataset (RFCP) were used for network model training. To verify the performance of RapeNet series, the paper compares the counting result with the real values of manual annotation. The average accuracy (Acc), relative root mean square error (rrMSE) and R2 of the metrics are up to 0.9062, 12.03 and 0.9635 on the dataset RFRB, and 0.9538, 5.61 and 0.9826 on the data set RFCP, respectively. The resolution has little influence for the proposed model. In addition, the visualization results have some interpretability.Conclusions Extensive experimental results demonstrate that the RapeNet series outperforms other state-of-the-art counting approaches. The proposed method provides an important technical support for the crop counting statistics of rape flower clusters in field.

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