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Sensors 2018, 18(3), 806; https://doi.org/10.3390/s18030806

Automatic Non-Destructive Growth Measurement of Leafy Vegetables Based on Kinect

1
College of Biosystems Engineering and Food Science, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
2
Key Laboratory of On Site Processing Equipment for Agricultural Products, Ministry of Agriculture, Beijing 100125, China
*
Author to whom correspondence should be addressed.
Received: 29 January 2018 / Revised: 27 February 2018 / Accepted: 5 March 2018 / Published: 7 March 2018
(This article belongs to the Collection Sensors in Agriculture and Forestry)
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Abstract

Non-destructive plant growth measurement is essential for plant growth and health research. As a 3D sensor, Kinect v2 has huge potentials in agriculture applications, benefited from its low price and strong robustness. The paper proposes a Kinect-based automatic system for non-destructive growth measurement of leafy vegetables. The system used a turntable to acquire multi-view point clouds of the measured plant. Then a series of suitable algorithms were applied to obtain a fine 3D reconstruction for the plant, while measuring the key growth parameters including relative/absolute height, total/projected leaf area and volume. In experiment, 63 pots of lettuce in different growth stages were measured. The result shows that the Kinect-measured height and projected area have fine linear relationship with reference measurements. While the measured total area and volume both follow power law distributions with reference data. All these data have shown good fitting goodness (R2 = 0.9457–0.9914). In the study of biomass correlations, the Kinect-measured volume was found to have a good power law relationship (R2 = 0.9281) with fresh weight. In addition, the system practicality was validated by performance and robustness analysis. View Full-Text
Keywords: plant growth measurement; Kinect v2; non-destructive; point cloud; 3D reconstruction plant growth measurement; Kinect v2; non-destructive; point cloud; 3D reconstruction
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Hu, Y.; Wang, L.; Xiang, L.; Wu, Q.; Jiang, H. Automatic Non-Destructive Growth Measurement of Leafy Vegetables Based on Kinect. Sensors 2018, 18, 806.

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