arXiv:2508.12802cs.CVastro-ph.IM2025-08被引 2

用计算机视觉自动识别食双星类型,准确率超96%。

Morphological classification of eclipsing binary stars using computer vision methods

  • 将光变曲线转为极坐标+六边形图,输入预训练模型分类
  • 多波段验证准确率>96%,TESS数据最高达100%
  • 适合大规模巡天中双星形态分类,但斑点检测仍不理想

我们应用计算机视觉方法对食双星的光变曲线进行形态分类。采用基于卷积神经网络(ResNet50)和视觉变压器(vit_base_patch16_224)的预训练模型,并在合成数据生成的图像上进行微调。为提升模型泛化能力并减少过拟合,我们提出一种新图像表示:将相位折叠的光变曲线转换为极坐标并结合六边形可视化。采用分层策略,第一阶段区分分离与相接型系统,第二阶段判断是否存在斑点。二分类模型在多个波段(Gaia G、I 和 TESS)的验证数据上准确率均超过96%,在OGLE、DEBCat和WUMaCat等观测数据集上表现良好(准确率>94%,TESS最高达100%)。尽管主任务分类效果优异,但自动化斑点检测表现较差,暴露出模型在识别细微光变特征方面的明显局限。本研究展示了计算机视觉在大规模巡天中食双星形态分类的潜力,但也强调了未来需加强鲁棒的自动斑点检测研究。

原文摘要 · Abstract (English)

We present an application of computer vision methods to classify the light curves of eclipsing binaries (EB). We have used pre-trained models based on convolutional neural networks ($\textit{ResNet50}$) and vision transformers ($\textit{vit\_base\_patch16\_224}$), which were fine-tuned on images created from synthetic datasets. To improve model generalisation and reduce overfitting, we developed a novel image representation by transforming phase-folded light curves into polar coordinates combined with hexbin visualisation. Our hierarchical approach in the first stage classifies systems into detached and overcontact types, and in the second stage identifies the presence or absence of spots. The binary classification models achieved high accuracy ($>96\%$) on validation data across multiple passbands (Gaia~$G$, $I$, and $TESS$) and demonstrated strong performance ($>94\%$, up to $100\%$ for $TESS$) when tested on extensive observational data from the OGLE, DEBCat, and WUMaCat catalogues. While the primary binary classification was highly successful, the secondary task of automated spot detection performed poorly, revealing a significant limitation of our models for identifying subtle photometric features. This study highlights the potential of computer vision for EB morphological classification in large-scale surveys, but underscores the need for further research into robust, automated spot detection.

食双星计算机视觉光变曲线分类

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