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Classification of merger and non-interacting-galaxies

Results

Model Classification Accuracy Area under ROC curve
CNN 94.72% 0.94
XGBoost + PCA 86.75% 0.85
Transfer Learning (ResNet18_2) 96.25% 0.96
Transfer Learning (ResNet34) 94.75% 0.95
Transfer Learning (ResNet18) 92.89% 0.93
Transfer Learning (Xception) 79.19% 0.77
CNN Ensemble 93.77% 0.93
XGBoost 89.12% 0.95
FFT+XGBoost 83.79% <not_yet_calc>
SMOTE resampling 89.29% 0.95

Some statistics of the best model (Resnet18_2) are 1:

Recall Precision F1 score
0.966 0.9695 0.9677

[1] These values were calculated after a single experiment but could change slightly on a different pass.

References

Ackermann, S., Schawinski, K., Zhang, C., Weigel, A., & Turp, M. (2018). Using transfer learning to detect galaxy mergers. Monthly Notices Of The Royal Astronomical Society, 479(1), 415-425. doi: 10.1093/mnras/sty1398

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Using DL (CNNs) and ML (Tree-based methods) on image pixels and other extracted features (eg: FFT) for classification of merger galaxies.

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