A PADDY GRAIN SIZE ANALYSIS SYSTEM FOR VARIETY BREEDING | Hưng | TNU Journal of Science and Technology

A PADDY GRAIN SIZE ANALYSIS SYSTEM FOR VARIETY BREEDING

About this article

Received: 14/02/25                Revised: 06/03/25                Published: 07/03/25

Authors

1. Ha Quang Hung, 1VNU University of Engineering and Technology
2. Phung Truong Trinh, 1VNU University of Engineering and Technology
3. Le Hoang Vu, 1VNU University of Engineering and Technology
4. Nguyen Minh Quan, 1VNU University of Engineering and Technology
5. Nguyen Thi Kim Cuc, 1VNU University of Engineering and Technology
6. Nguyen Van Quyet, 1VNU University of Engineering and Technology
7. Chu Duc Ha, 1VNU University of Engineering and Technology
8. Nguyen Thi Hong, 2Agricultural Genetics Institute - Vietnam Academy of Agricultural Sciences
9. Pham Minh Trien Email to author, 1VNU University of Engineering and Technology

Abstract


In rice breeding, the size and shape of rice grains are key indicators of yield potential; however, manually measuring the large number of grains from dozens to hundreds of hybrid pairs is very time-consuming, making the automation of this process essential. This study develops a grain size analysis system comprising three components: (1) an industrial computer; (2) a fixed image capture system; and (3) software running on the Linux operating system. Among the evaluated grain recognition models, including U-Net, U-Net++, ResNet, and YOLOv8, the YOLOv8 model achieved mAP50, mAP50:95, and an average Dice coefficient of 0.99, 0.91, and 0.98, respectively. Two extraction methods were applied to estimate grain size, with the approach that calculates width based on the perpendicular distance from the center to the nearest point yielding an MAE of 0.38. The average time the system takes to process an image is 3.4 seconds, and it remains stable for up to 500 images (16,489 grains). With its high performance and scalability, the system can be widely applied in research institutes, breeding companies, and training organizations, contributing to the automation of grain analysis and the enhancement of rice production quality.

Keywords


Paddy grain; Grain size; Breeding; Machine learning; Paddy grain Grain size Breeding Machine learning Automation

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DOI: https://doi.org/10.34238/tnu-jst.12049

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