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Mapping the wavelength position of mineral features in hyperspectral thermal infrared data / Christoph Hecker in International journal of applied Earth observation and geoinformation, vol 79 (July 2019)  

Public [article]  inInternational journal of applied Earth observation and geoinformation > vol 79 (July 2019) . - pp 133-140 Titre : Mapping the wavelength position of mineral features in hyperspectral thermal infrared data Type de document : Article/Communication Auteurs : Christoph Hecker, Auteur ; Frank J.A. Van Ruitenbeek, Auteur ; Wim H. Bakker, Auteur ; Babatunde J. Fagbohun, Auteur ; et al., Auteur Année de publication : 2019 Article en page(s) : pp 133-140 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] carte géologique [Termes IGN] feldspath [Termes IGN] filtrage du bruit [Termes IGN] image aérienne [Termes IGN] image hyperspectrale [Termes IGN] image thermique [Termes IGN] longueur d'onde [Termes IGN] Nevada (Etats-Unis) [Termes IGN] prospection minérale [Termes IGN] quartz Résumé : (auteur) The Wavelength Mapper is an algorithm that searches for the deepest absorption feature in each pixel of a hyperspectral image. On a per pixel basis, it extracts the wavelength position, which serves as a proxy of the mineralogy and the feature depth as a proxy for the relative abundance. This algorithm has been used with near and shortwave infrared data, but has not yet been tested on hyperspectral thermal infrared images. It is unclear what results are expected when the Wavelength Mapper algorithm is applied to hyperspectral thermal infrared data since reststrahlen features characteristically overlap in emissivity spectra. In this paper, the Wavelength Mapper is tested on a multi-flightline airborne hyperspectral TIR dataset acquired over the Yerington Batholith, Nevada. Observations were made in the 8.05–11.65 μm wavelength range to include thermal spectral features of major rock-forming minerals, and a new color ramp is created to separate quartz-rich rocks from plagioclase-rich rocks. Our results indicate that the Wavelength Mapper creates coherent spatial patterns across flightlines. The results displayed represent different types of igneous and sedimentary rocks, as well as the products of hydrothermal alteration via different colors, mainly based on the relative abundance of quartz, feldspar and garnet, as well as mica and epidote. Comparison with published maps indicate that the Wavelength Mapper represents for each pixel a parameter value that can be linked to the spectrally dominate rock-forming mineral of that area, as mapped with traditional fieldwork methods. In conclusion, the Wavelength Mapper can be applied to airborne hyperspectral TIR data to achieve a simple, repeatable, per-pixel overview map of the dominating rock-forming mineral occurrences. Numéro de notice : A2019-467 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.jag.2019.02.013 Date de publication en ligne : 20/03/2019 En ligne : https://doi.org/10.1016/j.jag.2019.02.013 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=93603 [article]

Noise simulation and correction in synthetic airborne TIR Data for mineral quantification / Christoph Hecker in IEEE Transactions on geoscience and remote sensing, vol 54 n° 3 (March 2016)  

Public [article]  inIEEE Transactions on geoscience and remote sensing > vol 54 n° 3 (March 2016) . - pp 1545 - 1553 Titre : Noise simulation and correction in synthetic airborne TIR Data for mineral quantification Type de document : Article/Communication Auteurs : Christoph Hecker, Auteur ; Dean Riley, Auteur ; Mark Van Der Meijde, Auteur ; et al., Auteur Année de publication : 2016 Article en page(s) : pp 1545 - 1553 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] erreur systématique [Termes IGN] image aérienne [Termes IGN] image hyperspectrale [Termes IGN] image thermique [Termes IGN] prospection minérale [Termes IGN] quartz [Termes IGN] rapport signal sur bruit [Termes IGN] rayonnement infrarouge thermique [Termes IGN] régression [Termes IGN] simulation Résumé : (Auteur) Rock-forming minerals (such as feldspar and quartz) can be identified and quantified from thermal infrared (TIR) laboratory spectroscopy using spectral models. This paper uses synthetic airborne TIR spectra to test whether the hyperspectral Spatially Enhanced Broadband Array Spectrograph System (SEBASS) would theoretically be able to detect quartz and feldspar minerals and quantitatively predict mineral modes in felsic igneous rocks. Data from a previous laboratory study were used to simulate TIR spectra with band locations and noise levels of the SEBASS sensor. The quantitative partial least squares regression (PLSR) models from that study were applied to newly created synthetic SEBASS data, and results were compared with the predictions from the previous study. Predicted compositions based on SEBASS band positions are nearly identical (ρ = 0.995) to those based on laboratory resolution. Results are still reliable [prediction errors within 0.4% (absolute)] to the original laboratory PLSR predictions when adding up to 1% noise (about five times the SEBASS noise level) to the synthetic data. Prediction errors rapidly increase when noise levels beyond 1% are used. These results show that SEBASS' spectral resolution, spectral coverage, and signal-to-noise levels are sufficient to quantitatively predict quartz and feldspar amounts, and feldspar compositions with models based on PLSR. Spectral distortions, such as reduced spectral contrast, tilts, and vertical shifts, must be compensated for before these quantitative models are applied. A mean and standard deviation (MASD) normalization is proposed using a set of ground data for compensating systematic errors that are common to all image pixels. Numéro de notice : A2016-124 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2015.2482386 En ligne : https://doi.org/10.1109/TGRS.2015.2482386 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80005 [article]

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Averaged emissivities of quartz and Sahara dust powders in the infrared region / T. Takashima in Remote sensing of environment, vol 26 n° 3 (01/12/1988)  

Public [article]  inRemote sensing of environment > vol 26 n° 3 (01/12/1988) . - pp 301 - 302 Titre : Averaged emissivities of quartz and Sahara dust powders in the infrared region Type de document : Article/Communication Auteurs : T. Takashima, Auteur ; K. Masuda, Auteur Année de publication : 1988 Article en page(s) : pp 301 - 302 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] bande infrarouge [Termes IGN] emissivité [Termes IGN] poussière [Termes IGN] quartz [Termes IGN] Sahara, désert du Numéro de notice : A1988-152 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/0034-4257(88)90084-3 En ligne : https://doi.org/10.1016/0034-4257(88)90084-3 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=24731 [article]

Use of airborne imaging spectrometer data to map minerals associated with hydrothermally altered rocks in the northern grapevine mountains, Nevada, and California / F.A. Kruse in Remote sensing of environment, vol 24 n° 1 (February 1988)  

Public [article]  inRemote sensing of environment > vol 24 n° 1 (February 1988) . - pp 31 - 51 Titre : Use of airborne imaging spectrometer data to map minerals associated with hydrothermally altered rocks in the northern grapevine mountains, Nevada, and California Type de document : Article/Communication Auteurs : F.A. Kruse, Auteur Année de publication : 1988 Article en page(s) : pp 31 - 51 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] absorption [Termes IGN] Argile [Termes IGN] Californie (Etats-Unis) [Termes IGN] carte géologique [Termes IGN] couleur (variable spectrale) [Termes IGN] géologie locale [Termes IGN] image Landsat-MSS [Termes IGN] minerai [Termes IGN] Nevada (Etats-Unis) [Termes IGN] quartz [Termes IGN] réflectance [Termes IGN] roche [Termes IGN] roche sédimentaire [Termes IGN] signature spectrale [Termes IGN] spectromètre [Termes IGN] Thematic Mapper [Termes IGN] traitement d'image Numéro de notice : A1988-040 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/0034-4257(88)90004-1 En ligne : https://doi.org/10.1016/0034-4257(88)90004-1 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=24619 [article]

Emissivities of quartz and Sahara dust powders in the infrared region (7-17 micrometers) / T. Takashima in Remote sensing of environment, vol 23 n° 1 (01/10/1987)  

Public [article]  inRemote sensing of environment > vol 23 n° 1 (01/10/1987) . - pp 51 - 63 Titre : Emissivities of quartz and Sahara dust powders in the infrared region (7-17 micrometers) Type de document : Article/Communication Auteurs : T. Takashima, Auteur ; K. Masuda, Auteur Année de publication : 1987 Article en page(s) : pp 51 - 63 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] bande infrarouge [Termes IGN] emissivité [Termes IGN] particule [Termes IGN] quartz [Termes IGN] rayonnement infrarouge thermique [Termes IGN] Sahara, désert du Numéro de notice : A1987-370 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/0034-4257(87)90070-8 En ligne : https://doi.org/10.1016/0034-4257(87)90070-8 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=24443 [article]

Morphométrie, morphoscopie, minéraux lourds / Charles Cazabat (1977)

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Réunions de l’Institut d’optique : Compte-rendu des réunions en 1931 / Institut d'optique (Paris) (1931)

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