no code implementations • 5 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.
1 code implementation • 24 Aug 2023 • François Painblanc, Laetitia Chapel, Nicolas Courty, Chloé Friguet, Charlotte Pelletier, Romain Tavenard
While large volumes of unlabeled data are usually available, associated labels are often scarce.
1 code implementation • 17 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.
1 code implementation • 4 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.
1 code implementation • 20 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.
1 code implementation • 25 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.
10 code implementations • 11 Sep 2019 • Hassan Ismail Fawaz, Benjamin Lucas, Germain Forestier, Charlotte Pelletier, Daniel F. Schmidt, Jonathan Weber, Geoffrey I. Webb, Lhassane Idoumghar, Pierre-Alain Muller, François Petitjean
TSC is the area of machine learning tasked with the categorization (or labelling) of time series.
2 code implementations • 25 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.
2 code implementations • 28 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.
1 code implementation • 26 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.
4 code implementations • 31 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.