Search Results for author: Charlotte Pelletier

Found 11 papers, 10 papers with code

Deep Learning for Satellite Image Time Series Analysis: A Review

no code implementations5 Apr 2024 Lynn Miller, Charlotte Pelletier, Geoffrey I. Webb

Earth observation (EO) satellite missions have been providing detailed images about the state of the Earth and its land cover for over 50 years.

Earth Observation Management +2

Generalized Classification of Satellite Image Time Series with Thermal Positional Encoding

1 code implementation17 Mar 2022 Joachim Nyborg, Charlotte Pelletier, Ira Assent

Unlike previous positional encoding based on calendar time (e. g. day-of-year), TPE is based on thermal time, which is obtained by accumulating daily average temperatures over the growing season.

Crop Classification Time Series +1

TimeMatch: Unsupervised Cross-Region Adaptation by Temporal Shift Estimation

1 code implementation4 Nov 2021 Joachim Nyborg, Charlotte Pelletier, Sébastien Lefèvre, Ira Assent

However, when applied to target regions spatially different from the training region, these models perform poorly without any target labels due to the temporal shift of crop phenology between regions.

Crop Classification Time Series +2

Elastic Similarity and Distance Measures for Multivariate Time Series

1 code implementation20 Feb 2021 Ahmed Shifaz, Charlotte Pelletier, Francois Petitjean, Geoffrey I. Webb

Elastic similarity and distance measures are a class of similarity measures that can compensate for misalignments in the time axis of time series data.

Classification Dynamic Time Warping +5

A Bayesian-inspired, deep learning-based, semi-supervised domain adaptation technique for land cover mapping

1 code implementation25 May 2020 Benjamin Lucas, Charlotte Pelletier, Daniel Schmidt, Geoffrey I. Webb, François Petitjean

In this paper we present Sourcerer, a Bayesian-inspired, deep learning-based, semi-supervised DA technique for producing land cover maps from SITS data.

Domain Adaptation Management +2

TS-CHIEF: A Scalable and Accurate Forest Algorithm for Time Series Classification

2 code implementations25 Jun 2019 Ahmed Shifaz, Charlotte Pelletier, Francois Petitjean, Geoffrey I. Webb

We demonstrate that TS-CHIEF can be trained on 130k time series in 2 days, a data quantity that is beyond the reach of any TSC algorithm with comparable accuracy.

Attribute General Classification +3

BreizhCrops: A Time Series Dataset for Crop Type Mapping

2 code implementations28 May 2019 Marc Rußwurm, Charlotte Pelletier, Maximilian Zollner, Sébastien Lefèvre, Marco Körner

We present Breizhcrops, a novel benchmark dataset for the supervised classification of field crops from satellite time series.

Crop Type Mapping Time Series +2

Temporal Convolutional Neural Network for the Classification of Satellite Image Time Series

1 code implementation26 Nov 2018 Charlotte Pelletier, Geoffrey I. Webb, Francois Petitjean

The experimental results show that TempCNNs are more accurate than RF and RNNs, that are the current state of the art for SITS classification.

Classification General Classification +3

Proximity Forest: An effective and scalable distance-based classifier for time series

4 code implementations31 Aug 2018 Benjamin Lucas, Ahmed Shifaz, Charlotte Pelletier, Lachlan O'Neill, Nayyar Zaidi, Bart Goethals, Francois Petitjean, Geoffrey I. Webb

We demonstrate on a 1M time series Earth observation dataset that Proximity Forest retains this accuracy on datasets that are many orders of magnitude greater than those in the UCR repository, while learning its models at least 100, 000 times faster than current state of the art models Elastic Ensemble and COTE.

Attribute Earth Observation +4

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