摘要
The root system plays a vital role in plants'ability to absorb water and nutrients.In situ root research offers an intuitive approach to exploring root phenotypes and their dynamics.Deep-learning-based root segmentation methods have gained popularity,but they require large labeled datasets for training.This paper presents an expansion method for in situ root datasets using an improved CycleGAN generator.In addition,spatial-coordinate-based target background separation method is proposed,which solves the issue of background pixel variations caused by generator errors.Compared to traditional threshold segmentation methods,this approach demonstrates superior speed,accuracy,and stability.Moreover,through time-division soil image acquisition,diverse culture medium can be replaced in insitu root images,thereby enhancing dataset versatility.After validating the performance of the lmproved_UNet network on the augmented dataset,the optimal results show a 0.63%increase in mean intersection over union,0.41%in F1,and 0.04%in accuracy.In terms of generalization performance,the optimal results show a 33.6%increase in mean intersection over union,28.11%in F1,and 2.62%in accuracy.The experimental results confirm the feasibility and practicality of the proposed dataset augmentation strategy.In the future,we plan to combine normal mapping with rendering software to achieve more accurate shading simulations of in situ roots.In addition,we aim to create a broader range of images that encompass various crop varieties and soil types.
基金
supported by grants from the National Natural Science Foundation of China(nos.32272220 and 32172120)
the Top-notch Talent Plan Program of the Education Department of Hebei Province(BJ2021058)
the State Key Laboratory of North China Crop Improvement and Regulation(NCCIR2021ZZ-23)
Central Guiding Local Science and Technology Development Fund Project(236Z7402G).
作者简介
Qiushi Yu,contributed equally to this work;Nan Wang,contributed equally to this work;Address correspondence to:Liantao Liu,liultday@126.com.
