Centre de documentation
scientifique

Integrated shadow removal based on photogrammetry and image analysis / Y. Li in International Journal of Remote Sensing IJRS, vol 26 n° 18 (September 2005)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 26 n° 18 (September 2005) . - pp 3911 - 3929 Titre : Integrated shadow removal based on photogrammetry and image analysis Type de document : Article/Communication Auteurs : Y. Li, Auteur ; P. Gong, Auteur ; T. Sasagawa, Auteur Année de publication : 2005 Article en page(s) : pp 3911 - 3929 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] ADS40 [Termes IGN] détection automatique [Termes IGN] image à haute résolution [Termes IGN] image aérienne [Termes IGN] image RVB [Termes IGN] lancer de rayons [Termes IGN] milieu urbain [Termes IGN] modèle numérique de surface [Termes IGN] ombre [Termes IGN] rayonnement solaire [Termes IGN] segmentation d'image [Termes IGN] seuillage d'image [Termes IGN] système d'information géographique Résumé : (Auteur) This paper presents a methodology to automatically detect and remove the shadows in high-resolution urban aerial images for urban GIS applications. The image is generated by ADS40, which is a multiple line scanner. The system includes shadow simulation, ray tracing, integrated shadow detection. and shadow removal. The geodetic shadow is simulated from a digital surface model (DSM) and the sun attitude. Using an ADS40 camera model and collinearity equations, the corresponding scan line of the shadow is obtained. Ray tracing is used to determine the visibility of the shadow in the image. A building boundary driven height field ray tracing method is proposed to boost the tracing efficiency. Shadow segmentation is taken from the RGB image at the base of the traced image shadows. The segmentation threshold is derived from the histogram of the traced image shadow area. Shadow removal includes the shadow region and companion region labelling, the histogram processing, and intensity mapping. Some experiment results are presented to show the effectiveness of the methods. Numéro de notice : A2005-428 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431160500159347 En ligne : https://doi.org/10.1080/01431160500159347 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27564 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
080-05181	RAB	Revue	Centre de documentation	En réserve L003	Exclu du prêt