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Display and enhancement of gridded aeromagnetic data of the Solway basin / Stephen A. Drury in International Journal of Remote Sensing IJRS, vol 8 n° 10 (October 1987)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 8 n° 10 (October 1987) . - pp 1433 - 1444 Titre : Display and enhancement of gridded aeromagnetic data of the Solway basin Type de document : Article/Communication Auteurs : Stephen A. Drury, Auteur ; Adrian S.D. Walker, Auteur Année de publication : 1987 Article en page(s) : pp 1433 - 1444 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] accentuation d'image [Termes IGN] centre de gravité [Termes IGN] champ magnétique local [Termes IGN] Grande-Bretagne [Termes IGN] visualisation de données Résumé : (auteur) The British Geological Survey has completed the conversion of both aeromagnetic and gravity survey records to a digital data base. This paper examines some of the uses of the aeromagnetic data base. Rendering digitized aeromagnetic data as a rectangular grid of interpolated anomaly values allows regional variations in subsurface magnetization to be displayed as images rather than contoured maps. Images of the magnetic field are more appropriate for visual interpretation and can be enhanced using standard methods of digital image processing. The optimum method is a combination of directional first-derivative filtering to impart the illusion of side illumination, with spectral colouring of the 8-bit range of DN, the former being used to modulate the brightness of the latter. As well as many of the known regional magnetic features of the Solway Basin, this method highlights several trends that were unsuspected. Numéro de notice : A1987-266 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431168708954787 En ligne : https://doi.org/10.1080/01431168708954787 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=24356 [article]

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