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Location-based anonymization: comparison and evaluation of the Voronoi-based aggregation system / William Lee Croft in International journal of geographical information science IJGIS, vol 30 n° 11-12 (November - December 2016)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 30 n° 11-12 (November - December 2016) . - pp 2253 - 2275 Titre : Location-based anonymization: comparison and evaluation of the Voronoi-based aggregation system Type de document : Article/Communication Auteurs : William Lee Croft, Auteur ; Wei Shi, Auteur ; Jörg-Rüdiger Sack, Auteur ; Jean-Pierre Corriveau, Auteur Année de publication : 2016 Article en page(s) : pp 2253 - 2275 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique [Termes IGN] anonymisation [Termes IGN] diagramme de Voronoï [Termes IGN] partitionnement [Termes IGN] santé [Termes IGN] service fondé sur la position Résumé : (Auteur) Hospitals and health care organizations collect large amounts of detailed health care data that is in high demand by researchers. Thus, the possessors of such data are in need of methods that allow for this data to be released without compromising the confidentiality of the individuals to whom it pertains. As the geographic aspect of this data is becoming increasingly relevant for research being conducted, it is important for an anonymization process to pay due attention to the geographic attributes of such data. In this paper, a novel system for health care data anonymization is presented. At the core of the system is the aggregation of an initial regionalization guided by the use of a Voronoi diagram. We conduct a comparison with another location-based system of anonymization, GeoLeader. We show that our system is capable of producing results of a comparable quality with a much faster running time. Numéro de notice : A2016-753 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/13658816.2016.1170836 En ligne : http://dx.doi.org/10.1080/13658816.2016.1170836 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=82414 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-2016061	RAB	Revue	Centre de documentation	En réserve L003	Disponible

A new database visualization framework for the automatic construction of non-standard charts: re-creating the Chart of Napoleon’s russian campaign of 1812 / Wei Shi in Cartographica, vol 49 n° 4 (Winter 2014)  

Public [article]  inCartographica > vol 49 n° 4 (Winter 2014) . - pp 241 - 261 Titre : A new database visualization framework for the automatic construction of non-standard charts: re-creating the Chart of Napoleon’s russian campaign of 1812 Type de document : Article/Communication Auteurs : Wei Shi, Auteur ; Randy Goebel, Auteur ; Tanaka Yuzuru, Auteur Année de publication : 2014 Article en page(s) : pp 241 - 261 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique [Termes IGN] base de données hiérarchique [Termes IGN] base de données localisées [Termes IGN] carte ancienne [Termes IGN] diagramme [Termes IGN] visualisation de données Résumé : (Auteur) In the last decade, research on database visualization has made great progress in automatically constructing charts composed of standard primitive charts. The next research challenge is to automatically construct non-standard charts which cannot be simply composed with standard primitive types of charts. One typical example is the chart of Napoleon’s Russian campaign of 1812. As to the challenge of automatic construction of such complex charts, we may classify conventional visualization frameworks into two categories. The first category asks users to procedurally define non-standard charts by programming. The second category asks users to declaratively define non-standard charts with their logical specification using a given library of graphical objects. Here we will propose a new visualization framework in the second category for automatically constructing non-standard charts from their logical specifications and discuss how to apply our framework to create custom-made geovisualization charts. Such a specification is described by one or more pairs of data view schemata (DVSs) and chart view schemata (CVSs). Each DVS is used for manipulating the data store in a database. Each CVS is used for defining the rendered appearances of the different chart components. Using our framework, users can easily re-create and extend such complex non-standard charts as the chart of Napoleon’s campaign by simply providing their logical specifications. Numéro de notice : A2014-651 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.3138/carto.49.4.2487 En ligne : http://dx.doi.org/10.3138/carto.49.4.2487 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=75099 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
031-2014041	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Improved nonsubsampled contourlet transform for multi-sensor image registration / R. Wang in Photogrammetric Engineering & Remote Sensing, PERS, vol 79 n° 1 (January 2013)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 79 n° 1 (January 2013) . - pp 51 - 66 Titre : Improved nonsubsampled contourlet transform for multi-sensor image registration Type de document : Article/Communication Auteurs : R. Wang, Auteur ; J. Ma, Auteur ; H. Huang, Auteur ; Wei Shi, Auteur Année de publication : 2013 Article en page(s) : pp 51 - 66 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] appariement de lignes [Termes IGN] appariement de points [Termes IGN] détection de contours [Termes IGN] image SPOT 5 [Termes IGN] image Terra-ASTER [Termes IGN] similitude [Termes IGN] superposition d'images [Termes IGN] transformation Résumé : (Auteur) Homologous feature point extraction is a key problem in the multi-sensor image registration. In this paper, a new feature point extraction method using nonsubsampled contourlet transform (NSCT) and an adaptive shrink operator (ASO_NSCT) for multi-sensor image registration is proposed. Moreover, this proposed feature matching is different from the traditional feature matching strategies and is performed using a similarity measure computed from neighborhood circles in low-frequency bands. Then, a number of reliable matched couples with even distributions are obtained, which assures the accuracy of the registration. Applications of the proposed algorithm to different optical images as well as optical and synthetic aperture radar images show that, in each case, a large number of accurate matched couples could be identified. Additionally, the RMSE patterns are analyzed and comparisons of the parameters are carried out between the registration models and the actual ground structures, which further demonstrates the effectiveness of the proposed algorithm. Numéro de notice : A2013-005 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.79.1.51 En ligne : https://doi.org/10.14358/PERS.79.1.51 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32143 [article]

Introducing scale parameters for adjusting area objects in GIS based on least squares and variance component estimation / X. Tong in International journal of geographical information science IJGIS, vol 23 n°11-12 (november 2009)  

Public [article]  inInternational journal of geographical information science IJGIS > vol 23 n°11-12 (november 2009) . - pp 1413 - 1432 Titre : Introducing scale parameters for adjusting area objects in GIS based on least squares and variance component estimation Type de document : Article/Communication Auteurs : X. Tong, Auteur ; Wei Shi, Auteur ; D. Liu, Auteur Année de publication : 2009 Article en page(s) : pp 1413 - 1432 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG [Termes IGN] cadastre numérique [Termes IGN] cohérence des données [Termes IGN] compensation par moindres carrés [Termes IGN] coordonnées géographiques [Termes IGN] erreur systématique [Termes IGN] facteur d'échelle [Termes IGN] interpolation par pondération de zones [Termes IGN] numérisation du cadastre [Termes IGN] objet géographique zonal [Termes IGN] parcelle cadastrale [Termes IGN] système d'information géographique [Termes IGN] variance Résumé : (Auteur) In this paper, a least-squares based cadastral parcel area adjustment in geographic information systems (GIS) is developed based on (1) both the areas and coordinates being treated as observations with errors; and (2) scale parameters being introduced to take the systematic effect into account in the process of cadastral map digitization. The area condition equation for cadastral parcel considerations of scale parameters and geometric constraints is first constructed. The effects of the scale error on area adjustment results are then derived, and statistical hypothesis testing is presented to determine the significance of the scale error. Afterwards, Helmert's variance component estimation based on least-squares adjustment using the condition equation with additional parameters is proposed to determine the weight between the coordinate and area measurements of the parcel. Practical tests are conducted to illustrate the implementation of the proposed methods. Four schemes for solving the inconsistencies between the registered areas and the digitized areas of the parcels are studied. The analysis of the results demonstrates that in the case of significant systematic errors in cadastral map digitization, the accuracies of the adjusted coordinates and areas are improved by introducing scale parameters to reduce the systematic error influence in the parcel area adjustment. Meanwhile, Helmert's variance component estimation method determines more accurate weights of the digitized coordinates and parcel areas, and the least-squares adjustment solves the inconsistencies between the registered areas and the digitized areas of the parcels. Numéro de notice : A2009-514 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1080/13658810802077826 En ligne : https://doi.org/10.1080/13658810802077826 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30143 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
079-09071	RAB	Revue	Centre de documentation	En réserve L003	Disponible
079-09072	RAB	Revue	Centre de documentation	En réserve L003	Disponible

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]

An integrated method for satellite image interpolation / Wei Shi in International Journal of Remote Sensing IJRS, vol 28 n°5-6 (March 2007)  

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Computing the fuzzy topological relations of spatial objects based on induced fuzzy topology / K. Liu in International journal of geographical information science IJGIS, vol 20 n° 8 (september 2006)  

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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)  

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An integrated TIN and Grid method for constructing multi-resolution digital terrain models / B. Yang in International journal of geographical information science IJGIS, vol 19 n° 10 (november 2005)  

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A least squares-based method for adjusting the boundaries of area objects / X. Tong-Tong in Photogrammetric Engineering & Remote Sensing, PERS, vol 71 n° 2 (February 2005)  

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Modelling error propagation in vector-based overlay analysis / Wei Shi in ISPRS Journal of photogrammetry and remote sensing, vol 59 n° 1-2 (August 2004 - April 2005)  

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Modelling fuzzy topological relations between uncertain objects in a GIS / Wei Shi in Photogrammetric Engineering & Remote Sensing, PERS, vol 70 n° 8 (August 2004)  

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Estimation of the positional uncertainty in line simplification in GIS / C.K. Cheung in Cartographic journal (the), vol 41 n° 1 (June 2004)  

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A probability-based uncertainty model for point-in-polygon analysis in GIS / C.K. Cheung in Geoinformatica, vol 8 n° 1 (March - May 2004)  

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An object-oriented data model for complex objects in three-dimensional geographical information systems / Wei Shi in International journal of geographical information science IJGIS, vol 17 n° 5 (july - August 2003)  

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