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Increasing the spatial resolution of thermal infrared images using cokriging

Increasing the spatial resolution of thermal infrared images using cokriging
Increasing the spatial resolution of thermal infrared images using cokriging
Thermal infrared (TIR) satellite images are of great interest in many remote sensing applications. However, owing to well-known physical reasons and technical limitations, the TIR band has a spatial resolution that is coarser than the other multispectral bands for a given satellite sensor, i.e. visible and shortwave IR. Although the correlation coefficient between the TIR band and the other spectral bands is relatively small, the spatial cross-correlation shows a pattern of joint variability. In this fact, and in the spatial correlation of each spectral band, reside the fundamentals of image fusion by cokriging. A method is showed here for obtaining TIR images with enhanced spatial resolution using the TIR band and one or more spectral bands of the same scene and better spatial resolution. The technique is illustrated with a Landsat 7 ETM+ image. The high resolution TIR image has perfect coherence, if the cokriged image is degraded to its original resolution the degraded image is identical to the original and values of ERGAS (Erreur Relative Globale Adimensionnelle de Synthèse) and average Q (Image Quality Index) equal to 0.220 and 0.986 respectively were obtained.
1878-0296
117-122
Rodríguez Galiano, V.F.
e7778118-9055-4ae7-81e0-06be8e2dcaa4
Pardo-Igúzquiza, E.
83b7c105-07f9-417b-87a2-52034d3e1ae0
Chica-Olmo, M.
c7291c15-3b53-45d7-942c-06985f77d6f6
Rigol-Sánchez, J.P.
0b918a37-cc59-4967-87fa-e14468cd9b48
Rodríguez Galiano, V.F.
e7778118-9055-4ae7-81e0-06be8e2dcaa4
Pardo-Igúzquiza, E.
83b7c105-07f9-417b-87a2-52034d3e1ae0
Chica-Olmo, M.
c7291c15-3b53-45d7-942c-06985f77d6f6
Rigol-Sánchez, J.P.
0b918a37-cc59-4967-87fa-e14468cd9b48

Rodríguez Galiano, V.F., Pardo-Igúzquiza, E., Chica-Olmo, M. and Rigol-Sánchez, J.P. (2011) Increasing the spatial resolution of thermal infrared images using cokriging. Procedia Environmental Sciences, 3, 117-122. (doi:10.1016/j.proenv.2011.02.021).

Record type: Article

Abstract

Thermal infrared (TIR) satellite images are of great interest in many remote sensing applications. However, owing to well-known physical reasons and technical limitations, the TIR band has a spatial resolution that is coarser than the other multispectral bands for a given satellite sensor, i.e. visible and shortwave IR. Although the correlation coefficient between the TIR band and the other spectral bands is relatively small, the spatial cross-correlation shows a pattern of joint variability. In this fact, and in the spatial correlation of each spectral band, reside the fundamentals of image fusion by cokriging. A method is showed here for obtaining TIR images with enhanced spatial resolution using the TIR band and one or more spectral bands of the same scene and better spatial resolution. The technique is illustrated with a Landsat 7 ETM+ image. The high resolution TIR image has perfect coherence, if the cokriged image is degraded to its original resolution the degraded image is identical to the original and values of ERGAS (Erreur Relative Globale Adimensionnelle de Synthèse) and average Q (Image Quality Index) equal to 0.220 and 0.986 respectively were obtained.

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More information

Published date: March 2011
Organisations: Global Env Change & Earth Observation

Identifiers

Local EPrints ID: 360089
URI: http://eprints.soton.ac.uk/id/eprint/360089
ISSN: 1878-0296
PURE UUID: ece32f72-7a73-4aa5-8d13-a574b355494e

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Date deposited: 25 Nov 2013 13:48
Last modified: 14 Mar 2024 15:33

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Contributors

Author: V.F. Rodríguez Galiano
Author: E. Pardo-Igúzquiza
Author: M. Chica-Olmo
Author: J.P. Rigol-Sánchez

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