Search Results for author: Pablo A. Estévez

Found 8 papers, 3 papers with code

Improving Astronomical Time-series Classification via Data Augmentation with Generative Adversarial Networks

no code implementations13 May 2022 Germán García-Jara, Pavlos Protopapas, Pablo A. Estévez

Due to the latest advances in technology, telescopes with significant sky coverage will produce millions of astronomical alerts per night that must be classified both rapidly and automatically.

Data Augmentation Time Series +2

Deep Attention-Based Supernovae Classification of Multi-Band Light-Curves

no code implementations20 Jan 2022 Óscar Pimentel, Pablo A. Estévez, Francisco Förster

We offer three main contributions: 1) Based on temporal modulation and attention mechanisms, we propose a Deep attention model (TimeModAttn) to classify multi-band light-curves of different SN types, avoiding photometric or hand-crafted feature computations, missing-value assumptions, and explicit imputation/interpolation methods.

Classification Deep Attention +3

Transformation Based Deep Anomaly Detection in Astronomical Images

no code implementations15 May 2020 Esteban Reyes, Pablo A. Estévez

In this work, we propose several enhancements to a geometric transformation based model for anomaly detection in images (GeoTranform).

Anomaly Detection Dimensionality Reduction

On the Information Plane of Autoencoders

1 code implementation15 May 2020 Nicolás I. Tapia, Pablo A. Estévez

Recently, the Information Plane (IP) was proposed to analyze them, which is based on the information-theoretic concept of mutual information (MI).

Information Plane Mutual Information Estimation

RED: Deep Recurrent Neural Networks for Sleep EEG Event Detection

1 code implementation15 May 2020 Nicolás I. Tapia, Pablo A. Estévez

The brain electrical activity presents several short events during sleep that can be observed as distinctive micro-structures in the electroencephalogram (EEG), such as sleep spindles and K-complexes.

EEG Event Detection +4

Deep-HiTS: Rotation Invariant Convolutional Neural Network for Transient Detection

1 code implementation2 Jan 2017 Guillermo Cabrera-Vives, Ignacio Reyes, Francisco Förster, Pablo A. Estévez, Juan-Carlos Maureira

We introduce Deep-HiTS, a rotation invariant convolutional neural network (CNN) model for classifying images of transients candidates into artifacts or real sources for the High cadence Transient Survey (HiTS).

Feature Engineering

A Review of Feature Selection Methods Based on Mutual Information

no code implementations24 Sep 2015 Jorge R. Vergara, Pablo A. Estévez

In this work we present a review of the state of the art of information theoretic feature selection methods.

feature selection

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