Centre de documentation
scientifique

Application of wavelet transform for extracting edges of paddy fields from remotely sensed images / T. Ishida in International Journal of Remote Sensing IJRS, vol 25 n° 2 (January 2004)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 25 n° 2 (January 2004) . - pp 347 - 357 Titre : Application of wavelet transform for extracting edges of paddy fields from remotely sensed images Type de document : Article/Communication Auteurs : T. Ishida, Auteur ; S. Itagaki, Auteur ; Y. Sasaki, Auteur ; H. Ando, Auteur Année de publication : 2004 Article en page(s) : pp 347 - 357 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] contour [Termes IGN] détection de contours [Termes IGN] filtrage numérique d'image [Termes IGN] image SPOT [Termes IGN] polygone [Termes IGN] transformation en ondelettes Résumé : (Auteur) For geographical information systems (GIS) to be useful in the management of Japanese paddy fields, it is vital to be able to prepare base maps that define sections of field. We attempted to prepare a base map by detecting the edges of submerged paddy fields from a SPOT image with the use of multiresolution wavelet transform. The raw image of SPOT band 3 was decomposed into a low frequency approximation image and a set of high frequency detailed images to five levels, and then reconstructed. The reconstructed image at the fifth level was obtained from all of the high frequency images except for the low frequency approximation image. The image reconstructed up to full scale was then applied to a zero-crossing scheme and three post-processings-line thinning, removal of isolated pixels, and connection of pixels with their neighbours in order to obtain clear edges. The spatial features of the image indicating the edges obtained by multi-resolution wavelet transform were compared quantitatively with those obtained by using a difference of Gaussian (DOG) filter. The multi-resolution wavelet transform was better than the DOG filter in that the base map obtained by the wavelet transform method represented a 'field block', which is typically composed of 10 holdings of paddy field, more precisely than with the DOG filter, and in that the number of open polygons on this map was smaller, indicating that the wavelet transform method is more suitable for producing the base map in GIS for the management of paddy fields. Numéro de notice : A2004-054 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/0143116031000115120 En ligne : https://doi.org/10.1080/0143116031000115120 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26582 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
080-04021	RAB	Revue	Centre de documentation	En réserve L003	Exclu du prêt