Visual detection of rice rows based on Bayesian decision theory and robust regression least squares method

Authors

  • Jing He Key Laboratory of Key Technology on Agricultural Machine and Equipment, Ministry of Education, South China Agricultural University, Guangzhou 510642, China
  • Ying Zang Key Laboratory of Key Technology on Agricultural Machine and Equipment, Ministry of Education, South China Agricultural University, Guangzhou 510642, China
  • Xiwen Luo Key Laboratory of Key Technology on Agricultural Machine and Equipment, Ministry of Education, South China Agricultural University, Guangzhou 510642, China
  • Runmao Zhao Key Laboratory of Key Technology on Agricultural Machine and Equipment, Ministry of Education, South China Agricultural University, Guangzhou 510642, China
  • Jie He Key Laboratory of Key Technology on Agricultural Machine and Equipment, Ministry of Education, South China Agricultural University, Guangzhou 510642, China
  • Jinkang Jiao Key Laboratory of Key Technology on Agricultural Machine and Equipment, Ministry of Education, South China Agricultural University, Guangzhou 510642, China

Keywords:

rice rows detection, Bayesian decision theory, clustering, RRLSM, credibility analysis, automatic tracking

Abstract

Paddy field management is complicated and labor intensive. Correct row detection is important to automatically track rice rows. In this study, a novel method was proposed for accurate rice row recognition in paddy field transplanted by machine before the disappearance of row information. Firstly, Bayesian decision theory based on the minimum error was used to classify the period of collected images into three periods (T1: 0-7 d; T2: 7-28 d; T3: 28-45 d), and resulting in the correct recognition rate was 97.03%. Moreover, secondary clustering of feature points was proposed, which can solve some problems such as row breaking and tilting. Then, the robust regression least squares method (RRLSM) for linear fitting was proposed to fit rice rows to effectively eliminate interference by outliers. Finally, a credibility analysis of connected region markers was proposed to evaluate the accuracy of fitting lines. When the threshold of credibility was set at 40%, the correct recognition rate of fitting lines was 96.32%. The result showed that the method can effectively solve the problems caused by the presence of duckweed, high-density inter-row weeds, broken rows, tilting (±60°), wind and overlap. Keywords: rice rows detection, Bayesian decision theory, clustering, RRLSM, credibility analysis, automatic tracking DOI: 10.25165/j.ijabe.20211401.5910 Citation: He J, Zang Y, Luo X W, Zhao R M, He J, Jiao J K. Visual detection of rice rows based on Bayesian decision theory and robust regression least squares method. Int J Agric & Biol Eng, 2021; 14(1): 199–206.

Author Biographies

Jing He, Key Laboratory of Key Technology on Agricultural Machine and Equipment, Ministry of Education, South China Agricultural University, Guangzhou 510642, China

He Jing, PhD, College of engineering, South China Agricultural University, Guangzhou, Guangdong

Ying Zang, Key Laboratory of Key Technology on Agricultural Machine and Equipment, Ministry of Education, South China Agricultural University, Guangzhou 510642, China

Zang Ying, PhD, Professor, College of engineering, South China Agricultural University, Guangzhou, Guangdong

Xiwen Luo, Key Laboratory of Key Technology on Agricultural Machine and Equipment, Ministry of Education, South China Agricultural University, Guangzhou 510642, China

Luo Xiwen, PhD, Professor, College of engineering, South China Agricultural University, Guangzhou, Guangdong

Runmao Zhao, Key Laboratory of Key Technology on Agricultural Machine and Equipment, Ministry of Education, South China Agricultural University, Guangzhou 510642, China

Zhao Runmao, PhD, College of engineering, South China Agricultural University, Guangzhou, Guangdong

Jie He, Key Laboratory of Key Technology on Agricultural Machine and Equipment, Ministry of Education, South China Agricultural University, Guangzhou 510642, China

He Jie, PhD, College of engineering, South China Agricultural University, Guangzhou, Guangdong

Jinkang Jiao, Key Laboratory of Key Technology on Agricultural Machine and Equipment, Ministry of Education, South China Agricultural University, Guangzhou 510642, China

Jiao Jinkang, PhD, College of engineering, South China Agricultural University, Guangzhou, Guangdong

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Published

2021-02-10

How to Cite

He, J., Zang, Y., Luo, X., Zhao, R., He, J., & Jiao, J. (2021). Visual detection of rice rows based on Bayesian decision theory and robust regression least squares method. International Journal of Agricultural and Biological Engineering, 14(1), 199–206. Retrieved from https://ijabe.migration.pkpps06.publicknowledgeproject.org/index.php/ijabe/article/view/5910

Issue

Vol. 14 No. 1 (2021): IJABE

Section

Information Technology, Sensors and Control Systems

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