WeedCLR: Weed Contrastive Learning through Visual Representations with Class-Optimized Loss in Long-Tailed Datasets
作者: Alzayat Saleh, Alex Olsen, Jake Wood, Bronson Philippa, Mostafa Rahimi Azghadi
分类: cs.CV
发布日期: 2023-10-19
备注: 24 pages, 10 figures, 8 tables. Submitted to the Computers and Electronics in Agriculture journal
💡 一句话要点
提出WeedCLR以解决长尾数据集中的杂草分类问题
🎯 匹配领域: 支柱二:RL算法与架构 (RL & Architecture)
关键词: 杂草分类 对比学习 自监督学习 长尾数据集 类优化损失 深度学习 农业技术
📋 核心要点
- 现有的杂草分类方法受限于数据集的规模和多样性,导致模型的泛化能力不足。
- WeedCLR通过自监督学习和类优化损失函数,解决了长尾数据集中类别不平衡的问题。
- 在CottonWeedID15和DeepWeeds数据集上,WeedCLR分别提高了4.3%和5.6%的分类准确率,展现了优越的性能。
📝 摘要(中文)
图像分类在现代杂草管理和作物干预技术中至关重要。然而,现有杂草数据集的规模、种类和均衡性有限,阻碍了深度学习模型的开发。本文提出了一种新颖的杂草对比学习方法WeedCLR,利用深度表示的冯·诺依曼熵和类优化损失进行杂草分类。WeedCLR通过自监督学习在无标签的情况下学习丰富的视觉特征,并应用类优化损失函数来解决长尾数据集中的类别不平衡问题。实验结果表明,WeedCLR在CottonWeedID15和DeepWeeds两个公共数据集上分别提高了4.3%和5.6%的准确率,展现了更好的泛化能力和对不同环境条件的鲁棒性。这些显著的改进使WeedCLR成为长尾数据集中有效的杂草分类工具。
🔬 方法详解
问题定义:当前杂草分类面临的数据集规模小、类别不均衡的问题,限制了深度学习模型的有效性和泛化能力。现有的全监督分类方法需要大量昂贵的标注,难以广泛应用。
核心思路:WeedCLR通过自监督学习技术,利用无标签数据学习丰富的视觉特征,并结合类优化损失函数,专门针对长尾数据集中的类别不平衡问题进行优化。
技术框架:WeedCLR的整体架构包括自监督学习模块和类优化损失模块。自监督学习模块负责从无标签数据中提取特征,而类优化损失模块则通过调整损失函数来平衡各类别的影响。
关键创新:WeedCLR的核心创新在于结合冯·诺依曼熵的类优化损失,使得模型在处理长尾数据集时能够更有效地学习到少数类的特征,从而提升分类性能。
关键设计:在损失函数设计上,WeedCLR引入了类优化损失,确保模型在训练过程中对少数类样本给予更多关注,同时采用深度神经网络架构以增强特征提取能力。具体的参数设置和网络结构细节在实验部分进行了详细描述。
🖼️ 关键图片
📊 实验亮点
WeedCLR在CottonWeedID15数据集上实现了4.3%的准确率提升,在DeepWeeds数据集上则提升了5.6%。这些结果表明,WeedCLR在处理长尾数据集时具有更好的泛化能力和鲁棒性,显著优于现有方法。
🎯 应用场景
WeedCLR的研究成果在农业领域具有广泛的应用潜力,尤其是在杂草管理和作物干预技术中。通过提高杂草分类的准确性和效率,WeedCLR可以帮助农民和农业专家更好地识别和管理杂草,从而提高作物产量和减少农药使用。未来,该方法有望推广到其他植物分类和生态监测领域。
📄 摘要(原文)
Image classification is a crucial task in modern weed management and crop intervention technologies. However, the limited size, diversity, and balance of existing weed datasets hinder the development of deep learning models for generalizable weed identification. In addition, the expensive labelling requirements of mainstream fully-supervised weed classifiers make them cost- and time-prohibitive to deploy widely, for new weed species, and in site-specific weed management. This paper proposes a novel method for Weed Contrastive Learning through visual Representations (WeedCLR), that uses class-optimized loss with Von Neumann Entropy of deep representation for weed classification in long-tailed datasets. WeedCLR leverages self-supervised learning to learn rich and robust visual features without any labels and applies a class-optimized loss function to address the class imbalance problem in long-tailed datasets. WeedCLR is evaluated on two public weed datasets: CottonWeedID15, containing 15 weed species, and DeepWeeds, containing 8 weed species. WeedCLR achieves an average accuracy improvement of 4.3\% on CottonWeedID15 and 5.6\% on DeepWeeds over previous methods. It also demonstrates better generalization ability and robustness to different environmental conditions than existing methods without the need for expensive and time-consuming human annotations. These significant improvements make WeedCLR an effective tool for weed classification in long-tailed datasets and allows for more rapid and widespread deployment of site-specific weed management and crop intervention technologies.