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Application of satellite image processing techniques for Talakadu a unique archaeological landscape in India / M.B. Rajani in Photo interprétation, European journal of applied remote sensing, vol 45 n° 4 (novembre 2009)

Public [article]  inPhoto interprétation, European journal of applied remote sensing > vol 45 n° 4 (novembre 2009) . - pp 168 - 175 Titre : Application of satellite image processing techniques for Talakadu a unique archaeological landscape in India Type de document : Article/Communication Auteurs : M.B. Rajani, Auteur ; S.K. Patra, Auteur Année de publication : 2009 Article en page(s) : pp 168 - 175 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] image IRS-LISS [Termes IGN] image Landsat-TM [Termes IGN] image multibande [Termes IGN] Inde [Termes IGN] site archéologique [Termes IGN] traitement d'image Résumé : (Auteur) In the present work multi-spatial, spectral and temporal images taken from space platform were acquired to analyze Talakadu (an archaeological site in Karnataka, India) area and identify linear features and geometrical shapes on the surface that are not natural but can be human artefacts from the past and therefore might indicate potential loca-tions for archaeological exploration. Before such remote sensing data can be used they have to be processed and prepared for facilitating meaningful interpretation. The scope and importance of image processing and enhancements depend on the sur-face conditions of study area. The peculiar geo-graphical configuration of the Talakadu area has made the greater part of an old township complete-ly buried under wind blown sand from the river Kaveri that skirts the west of Talakadu. Towards carrying out analysis in spatial, spectral and tem-poral domains, space imagery from Landsat Thematic Mapper, Multispectral images from LISS-IV sensor of Indian Remote Sensing Satellite (IRS) series and high resolution images from IRS CAR-TOSAT series were used. Several image-processing algorithms were employed to evaluate their effica-cy to identify linear features and geometrical shapes that might indicate presence of buried remains. These include enhancements and improve-ments in data quality, Pan sharpening, Principal Component Analysis for enhancement and change detection studies. These analyses were conducted after subjecting all the imagery to a common refer-ence frame through automated registration using non-linear methods with sub-pixel accuracy. This work presents the details of the various image pro-cessing techniques used to investigate their effica-cy in the context of identifying the different archae-ological details both known ones and possibly new potential locations. Our preliminary analysis indi-cates at least four likely locations for further archaeological exploration, thus suggesting a new approach in the light of the methodology available. Numéro de notice : A2009-563 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30192 [article]

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