Growth prediction of tomato seedlings based on causal LSTM and GAN

Authors

  • Hongduo Zhang Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
  • Yutaka Kaizu Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
  • Furuhashi Kenichi Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
  • Heming Hu Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
  • Kenji Imou Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan

DOI:

https://doi.org/10.25165/ijabe.v18i3.8757

Keywords:

growth prediction, tomato seedlings, LSTM, GAN, deep learning

Abstract

The stable production of seedlings is very important for seedling growers. Predicting the growth of seedlings helps growers promptly adjust management strategies and production expectations. Traditional methods rely on historical growth data or assess current plant physiological parameters to estimate future growth. This study aims to predict future images directly from historical growth images of tomato seedlings. Specifically, a dataset of 10-d image sequences of tomato seedlings was collected. Then, an algorithm based on several neural networks was applied to predict the images of the next 5 d based on the images of the first 5 d. The algorithm was composed of a causal long short-term memory (LSTM) unit, a gradient highway unit (GHU), and a pix2pix unit. The experimental results showed that the introduction of a Generative Adversarial Network (GAN) further enhanced the clarity and realism of the predicted images, ensuring higher quality and more accurate visual results. From the perspective of image similarity, the average mean squared error (MSE) reached 394.97 and the average structural similarity (SSIM) reached 0.90 over 5 d. From the perspective of biological information, the average prediction errors of the plant area were 1.7, 1.4, 1.5, 0.9, and 3.2 cm2 over the 5 d, and the average prediction errors of plant height were 1.7, 1.9, 4.6, 6.9, and 4.5 mm, respectively. The extracted biological information such as plant area and height showed good following performance compared with the real growth information. The research results show that predicting future plant images from historical images has the potential to become a useful tool for nursery growers to adjust management strategies and production expectations. Keywords: growth prediction, tomato seedlings, LSTM, GAN, deep learning DOI: 10.25165/j.ijabe.20251803.8757 Citation: Zhang H D, Kaizu Y, Furuhashi K, Hu H M, Imou K. Growth prediction of tomato seedlings based on causal LSTM and GAN. Int J Agric & Biol Eng, 2025; 18(3): 51–57.

Author Biographies

Hongduo Zhang, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan

PhD candidate

Yutaka Kaizu, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan

PhD, Associate Professor, research interest machine vision, 3D mapping, field robotics, navigation, GPS.

Furuhashi Kenichi, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan

PhD,Assistant Professor,research interest:biomass energy.

Heming Hu, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan

PhD, research interest: agricultural aerial spraying, CFD,image processing

Kenji Imou, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan

Professor,PhD, Professor,research interest: renewable energy, bio fuel, Navigation sensor, autonomous vehicle, image processing

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Published

2025-06-30

How to Cite

Zhang, H., Kaizu, Y., Kenichi, F., Hu, H., & Imou, K. (2025). Growth prediction of tomato seedlings based on causal LSTM and GAN. International Journal of Agricultural and Biological Engineering, 18(3), 51–57. https://doi.org/10.25165/ijabe.v18i3.8757

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Section

Animal, Plant and Facility Systems