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Journal of Tea Science ›› 2023, Vol. 43 ›› Issue (5): 691-702.doi: 10.13305/j.cnki.jts.2023.05.007

• Research Paper • Previous Articles     Next Articles

Exploratory Study on the Image Processing Technology-based Tea Shoot Identification and Leaf Area Calculation

LÜ Danyu1, JIN Zijing2, LU Lu1, HE Weizhong3, SHU Zaifa3, SHAO Jingna3, YE Jianhui1,*, LIANG Yuerong1   

  1. 1. Tea Research Institute, Zhejiang University, Hangzhou 310058, China;
    2. Zhejiang Agricultural Technical Extension Center, Hangzhou 310000, China;
    3. Lishui Institute of Agriculture and Forestry Sciences, Lishui 323000, China
  • Received:2023-05-29 Revised:2023-08-23 Online:2023-10-15 Published:2023-11-06

Abstract: In this study, based on the picture collection of tea shoot growth in the field, we used deep learning target detection algorithm YOLOv5 to construct a model for identifying different growth stages of tea shoots, and the testing results indicate that the model had high accuracy. Furthermore, the Image-J software and the image processing methods of threshold cutting based on Gray, RGB and HSV values were applied to process tea leaf area, and the accuracy and efficiency of different methods were compared. The results show that the accuracy of HSV-based algorithm system of cutting tea leaves and automatically calculating tea leaf area was over 94%, which had better performance than RGB-based algorithm system. The research results provide technical support for the intelligent recognition model of tea growth state and information extraction algorithm of leaf traits, and also build a theoretical basis for the development of tea bud automatic recognition module of tea plucking machinery.

Key words: computer image processing technology, YOLO, tea shoot, growth stage, leaf area, model building

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