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Scientia Silvae Sinicae ›› 2020, Vol. 56 ›› Issue (10): 199-208.doi: 10.11707/j.1001-7488.20201022

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YOLOv3 Mouse Hole Recognition Based on Remote Sensing Images from Technology for Unmanned Aerial Vehicle

Bochao Cui1,2,Jianghua Zheng1,2,*,Zhongjun Liu3,Tao Ma1,2,Jianglong Shen1,2,Xuemi Zhao1,2   

  1. 1. College of Resources and Environmental Science, Xinjiang University Urumqi 830046
    2. Key Laboratory of Oasis Ecology of Ministry of Education, Xinjiang University Urumqi 830046
    3. Forest Pest Control and Quarantine Bureau of Xinjiang Urumqi 830000
  • Received:2019-07-04 Online:2020-10-25 Published:2020-11-26
  • Contact: Jianghua Zheng

Abstract:

Objective: Unmanned aerial vehicle (UAV) remote sensing combined with machine vision is used to identify large gerbil holes in desert forests,and the technology can automatically,accurately and efficiently acquire the distribution of rat holes and provide support for improving the efficiency of scientific rodent pest management. Method: In this paper,a method for identifying and locating rat holes was proposed by combining machine vision with remote sensing of unmanned aerial vehicle (UAV),which is suitable for the typical haunt of rodents of desert forests in the southern edge of Gurbantunggut Desert. The method includes two schemes for identifying rat holes using the YOLOv3 network and its lightweight solution YOLOv3-tiny network. First,the appropriate images were selected from the two low-altitude remote sensing images,and the images were cropped to 416×416 pixel images. The rat holes in the images were labeled with a labeling tool,and data set of the gerbil holes in desert forest was constructed. Then,k-means clustering algorithm was used to cluster the number and aspect ratio dimensions of target candidate boxes in the gerbil hole data set,so as to select a prior box suitable for the data set. Finally,the adjusted parameters were used to train the network,and the target detection precision (P),recall (R) and average precision (AP) of the rat hole data set were used as the evaluation indexes of the target detection algorithm. Result: The average accuracy of YOLOv3 network on the rat hole data set is 92.37%,the average accuracy of YOLOv3-tiny is 85.86%,and the AP of YOLOv3 network is 6.51% higher than that of YOLOv3-tiny network,but the number of YOLOv3-tiny parameters is only 1/13 of that of YOLOv3. The average time for the YOLOv3 network to detect a single image in this paper's hardware environment is 0.83 s,and that detection time for YOLOv3-tiny is 0.22 s. Conclusion: The above results indicate that UAV remote sensing combined with YOLOv3 network and YOLOv3-tiny network can realize the identification and location of large gerbil holes,effectively monitor the distribution of rat holes,and make up the deficiency of traditional methods in monitoring rat damage and improve the real-time and flexibility of monitoring gerbil damage.

Key words: machine vision, UAV, monitoring, mouseholes to identify, target detection, YOLOv3

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