用多视角图像提升地下根系成像清晰度,助力精准分析根部性状。
Multi-Image Super Resolution Framework for Detection and Analysis of Plant Roots
- 融合多视角重叠图像,利用空间冗余实现超分辨率重建。
- 相较现有方法降低2.3% BRISQUE值,提升图像质量且保持CLIP-IQA得分。
- 适合农业与生态研究中根系性状自动量化,尤其关注根毛数量与密度。
理解植物根系对推动土壤-植物互作、养分吸收及整体植株健康研究至关重要。然而,由于遮挡、土壤湿度变化和固有低对比度等不利条件,地下根系的精准成像仍面临持续挑战,制约了传统视觉方法的效果。本文提出一种新型地下成像系统,通过捕捉多个重叠视图并集成基于深度学习的多图像超分辨率(MISR)框架,以增强根系可见性与细节表现。为训练与评估该方法,我们构建了一个模拟真实地下成像场景的合成数据集,涵盖影响图像质量的关键环境因素。所提MISR算法利用多视图间的空间冗余,重建出结构保真度更高、视觉更清晰的高分辨率图像。定量评估表明,本方法优于现有超分辨率基线,实现2.3%的BRISQUE降低,同时保持相同CLIP-IQA分数,从而提升根系表型分析精度,准确估算根毛数量与根毛密度等关键性状。该框架为农业与生态研究中的鲁棒自动地下根系成像与性状量化提供了可行路径。
原文摘要 · Abstract (English)
Understanding plant root systems is critical for advancing research in soil-plant interactions, nutrient uptake, and overall plant health. However, accurate imaging of roots in subterranean environments remains a persistent challenge due to adverse conditions such as occlusion, varying soil moisture, and inherently low contrast, which limit the effectiveness of conventional vision-based approaches. In this work, we propose a novel underground imaging system that captures multiple overlapping views of plant roots and integrates a deep learning-based Multi-Image Super Resolution (MISR) framework designed to enhance root visibility and detail. To train and evaluate our approach, we construct a synthetic dataset that simulates realistic underground imaging scenarios, incorporating key environmental factors that affect image quality. Our proposed MISR algorithm leverages spatial redundancy across views to reconstruct high-resolution images with improved structural fidelity and visual clarity. Quantitative evaluations show that our approach outperforms state-of-the-art super resolution baselines, achieving a 2.3 percent reduction in BRISQUE, indicating improved image quality with the same CLIP-IQA score, thereby enabling enhanced phenotypic analysis of root systems. This, in turn, facilitates accurate estimation of critical root traits, including root hair count and root hair density. The proposed framework presents a promising direction for robust automatic underground plant root imaging and trait quantification for agricultural and ecological research.
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