Morphological classification of eclipsing binary stars using computer vision methods

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F25%3A00639439" target="_blank" >RIV/67985815:_____/25:00639439 - isvavai.cz</a>

Výsledek na webu

<a href="https://hdl.handle.net/11104/0369917" target="_blank" >https://hdl.handle.net/11104/0369917</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ascom.2025.100998" target="_blank" >10.1016/j.ascom.2025.100998</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Morphological classification of eclipsing binary stars using computer vision methods

Popis výsledku v původním jazyce

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 (ResNet50) and vision transformers (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.

Název v anglickém jazyce

Morphological classification of eclipsing binary stars using computer vision methods

Popis výsledku anglicky

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 (ResNet50) and vision transformers (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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Astronomy and Computing

ISSN

2213-1337

e-ISSN

2213-1345

Svazek periodika

53

Číslo periodika v rámci svazku

Oct.

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

100998

Kód UT WoS článku

001562206000001

EID výsledku v databázi Scopus

2-s2.0-105014424054