用纹理特征跨域预测木片含水率,准确率提升23%。
Robust Cross-Domain Adaptation in Texture Features Transferring for Wood Chip Moisture Content Prediction
- 融合五类纹理特征,构建统一预测模型
- 跨域适应方法使准确率从57%升至80%
- 适合生物质能源、木材加工等行业应用
精准快速预测木片含水率对优化生物燃料生产与保障能源效率至关重要。现有直接法(烘箱干燥)耗时长且破坏样本,间接法(近红外、电容、图像等)虽快速但受原料来源差异影响,导致数据分布变化,削弱数据驱动模型性能。本文基于人工提取纹理特征可预测木片含水率的发现,系统分析了五类纹理特征在木片图像中的表现。结果表明,综合五类特征的组合集达到95%预测准确率,显著优于单一特征。为此,提出一种名为AdaptMoist的域自适应方法,利用纹理特征实现不同来源木片数据间的知识迁移,有效缓解源域差异带来的影响。同时引入基于调整互信息的模型保存准则。AdaptMoist使跨域预测准确率提升23%,平均达80%,远超非自适应模型的57%。结果验证了AdaptMoist在多源场景下鲁棒预测木片含水率的有效性,具备在木片依赖型工业中推广的潜力。
原文摘要 · Abstract (English)
Accurate and quick prediction of wood chip moisture content is critical for optimizing biofuel production and ensuring energy efficiency. The current widely used direct method (oven drying) is limited by its longer processing time and sample destructiveness. On the other hand, existing indirect methods, including near-infrared spectroscopy-based, electrical capacitance-based, and image-based approaches, are quick but not accurate when wood chips come from various sources. Variability in the source material can alter data distributions, undermining the performance of data-driven models. Therefore, there is a need for a robust approach that effectively mitigates the impact of source variability. Previous studies show that manually extracted texture features have the potential to predict wood chip moisture class. Building on this, in this study, we conduct a comprehensive analysis of five distinct texture feature types extracted from wood chip images to predict moisture content. Our findings reveal that a combined feature set incorporating all five texture features achieves an accuracy of 95% and consistently outperforms individual texture features in predicting moisture content. To ensure robust moisture prediction, we propose a domain adaptation method named AdaptMoist that utilizes the texture features to transfer knowledge from one source of wood chip data to another, addressing variability across different domains. We also proposed a criterion for model saving based on adjusted mutual information. The AdaptMoist method improves prediction accuracy across domains by 23%, achieving an average accuracy of 80%, compared to 57% for non-adapted models. These results highlight the effectiveness of AdaptMoist as a robust solution for wood chip moisture content estimation across domains, making it a potential solution for wood chip-reliant industries.
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