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Fusing Ikonos images by a four-band wavelet transformation method / Wei Shi in Photogrammetric Engineering & Remote Sensing, PERS, vol 73 n° 11 (November 2007)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 73 n° 11 (November 2007) . - pp 1285 - 1292 Titre : Fusing Ikonos images by a four-band wavelet transformation method Type de document : Article/Communication Auteurs : Wei Shi, Auteur ; C. Zhu, Auteur ; S. Zhu, Auteur Année de publication : 2007 Article en page(s) : pp 1285 - 1292 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] analyse comparative [Termes IGN] fusion d'images [Termes IGN] image à résolution métrique [Termes IGN] image Ikonos [Termes IGN] image multibande [Termes IGN] image panchromatique [Termes IGN] transformation en ondelettes Résumé : (Auteur) This paper presents a wavelet transformation-based method for fusing high-resolution satellite images. First, a multi-band wavelet fusion method, specifically the four-band wavelet method, is proposed for fusing one-meter panchromatic and four-meter multi-spectral Ikonos images. Second, the fusion experiments are undertaken by using the proposed four-band wavelet method. The results are compared with fused images from other methods, such as two-band wavelet and IHS methods. The results are evaluated based on both visual evaluation and a quantitative analysis, by using several assessing parameters and a new evaluation method: the profile intensity curve. Third, as an application of the fused images, they are applied for recognition and identification of features in urban area. The quantitative analysis demonstrates that four-band wavelet transformation method provides improved fused images. Copyright ASPRS Numéro de notice : A2007-519 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.73.11.1285 En ligne : https://doi.org/10.14358/PERS.73.11.1285 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28882 [article]

The recognition of road network from high-resolution satellite remotely sensed data using image morphological characteristics / C. Zhu in International Journal of Remote Sensing IJRS, vol 26 n° 24 (December 2005)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 26 n° 24 (December 2005) . - pp 5493 - 5508 Titre : The recognition of road network from high-resolution satellite remotely sensed data using image morphological characteristics Type de document : Article/Communication Auteurs : C. Zhu, Auteur ; Wei Shi, Auteur ; et al., Auteur Année de publication : 2005 Article en page(s) : pp 5493 - 5508 Note générale : Bibliographie Langues : Français (fre) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] analyse visuelle [Termes IGN] appariement de formes [Termes IGN] échelle d'intensité [Termes IGN] extraction du réseau routier [Termes IGN] image à haute résolution [Termes IGN] image Ikonos [Termes IGN] morphologie mathématique [Termes IGN] niveau de gris (image) [Termes IGN] précision géométrique (imagerie) [Termes IGN] reconnaissance de formes [Termes IGN] réseau routier [Termes IGN] segment de droite Résumé : (Auteur) With the development of remote sensors and satellite technologies, high-resolution satellite data such as IKONOS images have been available recently. By these new high resolution satellite data, remote sensing technologies can be successfully applied to more application areas such as extracting road network from high resolution satellite images. This paper proposes a newly developed approach to extract a road network from high resolution satellite images. The approach is based on the binary and greyscale mathematical morphology and a line segment match method. First, the outline of road network is detected based on the grey morphological characteristics. Then, the basic road network is detected by the line segment match method. Next, the detected basic road network is processed based on the knowledge about the roads and binary mathematical morphological methods. Finally, visual analysis and three indicators are used to evaluate the accuracy of the extracted road networks. The results of the accuracy evaluation demonstrate that the developed road network extraction approach can provide both good visual effect and high positional accuracy. Numéro de notice : A2005-523 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431160500300354 En ligne : https://doi.org/10.1080/01431160500300354 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=27659 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
080-05241	RAB	Revue	Centre de documentation	En réserve L003	Exclu du prêt

Modelling error propagation in vector-based buffer analysis / Wei Shi in International journal of geographical information science IJGIS, vol 17 n° 3 (may 2003)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 17 n° 3 (may 2003) . - pp 251 - 271 Titre : Modelling error propagation in vector-based buffer analysis Type de document : Article/Communication Auteurs : Wei Shi, Auteur ; C.K. Cheung, Auteur ; C. Zhu, Auteur Année de publication : 2003 Article en page(s) : pp 251 - 271 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées [Termes IGN] analyse de données [Termes IGN] analyse numérique [Termes IGN] analyse spatiale [Termes IGN] base de données localisées [Termes IGN] données vectorielles [Termes IGN] propagation d'erreur [Termes IGN] zone tampon Résumé : (Auteur) Error propagation of buffer analysis in a vectorbased geographical information system (GIS) is studied with the use of statistics and numerical analyses. In this paper, such factors as the error of commission, the error of omission, the discrepant area and the normalized discrepant area are proposed as the error indicators of buffer analysis. Analytical expressions for the error indicators are developed as multiple integrals. A numerical integration method is recommended to find an approximation to the analytical expression. Numéro de notice : A2003-045 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article DOI : 10.1080/1365881022000016007 En ligne : https://doi.org/10.1080/1365881022000016007 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22342 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-03031	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-03032	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Multi-band wavelet for using Spot panchromatic and multispectral images / Wei Shi in Photogrammetric Engineering & Remote Sensing, PERS, vol 69 n° 5 (May 2003)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 69 n° 5 (May 2003) . - pp 513 - 520 Titre : Multi-band wavelet for using Spot panchromatic and multispectral images Type de document : Article/Communication Auteurs : Wei Shi, Auteur ; C. Zhu, Auteur ; Ca. Zhu, Auteur ; X. Yang, Auteur Année de publication : 2003 Article en page(s) : pp 513 - 520 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] fusion d'images [Termes IGN] image Landsat-TM [Termes IGN] image multibande [Termes IGN] image panchromatique [Termes IGN] image SPOT [Termes IGN] ondelette [Termes IGN] transformation en ondelettes [Termes IGN] transformation intensité-teinte-saturation Résumé : (Auteur) With the development of remote sensing technology, fusion of remotely sensed images, such as SPOT panchromatic (SPOT P) with SPOT multispectral images (SPOT XS) or Landsat Thematic Mapper (TM), has become more important in order to obtain richer information in the spatial and spectral domains simultaneously. Many fusion methods have been developed based on the twoband wavelet transformation. However, due to the limitations of the transformation characteristics themselves, the twoband wavelet is not very efficient for the fusion of images whose ratio of spatial resolutions is not 2n (n = 1, 2, 3, ...), e.g., for fusing a 101 resolution panchromatic SPOT image and with 30m resolution multispectral TM images. However, a recently developed new wavelet branchmultiband wavelet can potentially be applied to solve this problem. In this paper, we develop a new approach for fusing SPOT P images with multispectral TM images based on multiband wavelet transformation. First, the theoretical basis of multiband wavelet is presented and its transformation properties are analyzed. Second, a new method for fusing a SPOT P image with multispectral images using the multiband wavelet is proposed. Specifically, the threeband wavelet is implemented to fuse 1 10m SPOT panchromatic and 30m multispectral TM images. Third, this new method is compared with previous methods such as the twoband wavelet and IHS methods for image fusion. The proposed multiband wavelet approach demonstrates an improvement in spatial and spectral characteristics for fusing SPOT P and multispectral TM images. Numéro de notice : A2003-082 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.69.5.513 En ligne : https://doi.org/10.14358/PERS.69.5.513 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22378 [article]