论文标题

多级和二元分类机器学习模型在识别强重力镜头中的比较

Comparison of Multi-Class and Binary Classification Machine Learning Models in Identifying Strong Gravitational Lenses

论文作者

Teimoorinia, Hossen, Toyonaga, Robert D., Fabbro, Sebastien, Bottrell, Connor

论文摘要

通常,二进制分类镜头调查方案用于区分镜头候选和非镜头。但是,这些模型通常会遭受实质性的假阳性分类。这种假阳性经常出现,这是由于包含物体的图像,例如拥挤的来源,带有手臂的星系以及带有中央源和较小周围源的图像。因此,模型可能会将既定情况与爱因斯坦环混淆。已经提出,通过允许这种常见的错误分类图像类型构成自己的类别,机器学习模型将更容易地了解包含真实镜头的图像之间的区别,以及包含镜头冒名顶替者的图像。在F814W过滤器中,使用Hubble Space望远镜(HST)图像,我们比较应用于镜头查找任务的二进制和多类分类模型的用法。从我们的发现中,我们得出结论,使用多级模型在二进制模型上没有重大好处。我们还将使用多级机器学习模型以及潜在的新镜头候选者介绍简单的镜头搜索结果。

Typically, binary classification lens-finding schemes are used to discriminate between lens candidates and non-lenses. However, these models often suffer from substantial false-positive classifications. Such false positives frequently occur due to images containing objects such as crowded sources, galaxies with arms, and also images with a central source and smaller surrounding sources. Therefore, a model might confuse the stated circumstances with an Einstein ring. It has been proposed that by allowing such commonly misclassified image types to constitute their own classes, machine learning models will more easily be able to learn the difference between images that contain real lenses, and images that contain lens imposters. Using Hubble Space Telescope (HST) images, in the F814W filter, we compare the usage of binary and multi-class classification models applied to the lens finding task. From our findings, we conclude there is not a significant benefit to using the multi-class model over a binary model. We will also present the results of a simple lens search using a multi-class machine learning model, and potential new lens candidates.

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