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A Survey on Gaussian Processes for Earth-Observation Data Analysis: A Comprehensive Investigation

Camps-Valls, G; Verrelst, J; Munoz-Mari, J; Laparra, V; Mateo-Jimenez, F; Gomez-Dans, JL; (2016) A Survey on Gaussian Processes for Earth-Observation Data Analysis: A Comprehensive Investigation. IEEE Geoscience and Remote Sensing Magazine , 4 (2) pp. 58-78. 10.1109/MGRS.2015.2510084. Green open access

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Abstract

Gaussian processes (GPs) have experienced tremendous success in biogeophysical parameter retrieval in the last few years. GPs constitute a solid Bayesian framework to consistently formulate many function approximation problems. This article reviews the main theoretical GP developments in the field, considering new algorithms that respect signal and noise characteristics, extract knowledge via automatic relevance kernels to yield feature rankings automatically, and allow applicability of associated uncertainty intervals to transport GP models in space and time that can be used to uncover causal relations between variables and can encode physically meaningful prior knowledge via radiative transfer model (RTM) emulation. The important issue of computational efficiency will also be addressed. These developments are illustrated in the field of geosciences and remote sensing at local and global scales through a set of illustrative examples. In particular, important problems for land, ocean, and atmosphere monitoring are considered, from accurately estimating oceanic chlorophyll content and pigments to retrieving vegetation properties from multi- and hyperspectral sensors as well as estimating atmospheric parameters (e.g., temperature, moisture, and ozone) from infrared sounders.

Type: Article
Title: A Survey on Gaussian Processes for Earth-Observation Data Analysis: A Comprehensive Investigation
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/MGRS.2015.2510084
Publisher version: http://dx.doi.org/10.1109/MGRS.2015.2510084
Language: English
Additional information: Copyright © 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Keywords: Kernel, Biological system modeling, Training, Geology, Standards, Gaussian processes, Monitoring
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL SLASH
UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of S&HS
UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of S&HS > Dept of Geography
URI: https://discovery.ucl.ac.uk/id/eprint/1500607
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