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Land-cover change detection using one-class support vector machine / P. Li in Photogrammetric Engineering & Remote Sensing, PERS, vol 76 n° 3 (March 2010)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 76 n° 3 (March 2010) . - pp 255 - 263 Titre : Land-cover change detection using one-class support vector machine Type de document : Article/Communication Auteurs : P. Li, Auteur ; H. Xu, Auteur Année de publication : 2010 Article en page(s) : pp 255 - 263 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] analyse comparative [Termes IGN] classification par séparateurs à vaste marge [Termes IGN] détection de changement [Termes IGN] données multitemporelles [Termes IGN] Kappa de Cohen [Termes IGN] occupation du sol [Termes IGN] traitement d'image Résumé : (Auteur) Change detection using remote sensing has considerable potential for monitoring land-cover change. Commonly, one specific class of change is of interest in many applications. In this paper, a recently developed one-class classifier, the One-Class Support Vector Machine (OCSVM), is proposed for the change detection of one specific class by multitemporal classification. The classifier only requires samples from the change class of interest as the training data. The performance of the proposed method was evaluated in two applications by comparing with conventional post-classification comparison methods. The results demonstrated the proposed method achieved both higher overall accuracy and higher kappa coefficient than the conventional methods, and demonstrated good potential for further application. The study also indicated that with the ocsvm, the analysis can focus only on the specific class of interest and does not need to treat other classes, thus providing highly accurate change detection. The OCSVM-based change detection method, as a general and easily implemented method, can be used for applications where only the change of one specific class is of interest. Copyright ASPRS Numéro de notice : A2010-087 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.76.3.255 En ligne : https://doi.org/10.14358/PERS.76.3.255 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30283 [article]

A study of trajectory models for satellite image triangulation / Inseong Jeong in Photogrammetric Engineering & Remote Sensing, PERS, vol 76 n° 3 (March 2010)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 76 n° 3 (March 2010) . - pp 265 - 276 Titre : A study of trajectory models for satellite image triangulation Type de document : Article/Communication Auteurs : Inseong Jeong, Auteur ; J. Bethel, Auteur Année de publication : 2010 Article en page(s) : pp 265 - 276 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] image ALOS-PRISM [Termes IGN] image EO1-Hyperion [Termes IGN] image EROS [Termes IGN] image Quickbird [Termes IGN] image SPOT-HRV [Termes IGN] image Terra-ASTER [Termes IGN] implémentation (informatique) [Termes IGN] orbite [Termes IGN] point d'appui [Termes IGN] spatiotriangulation Résumé : (Auteur) Many spaceborne imagery products are provided with metadata or support data having diverse types, representations, frequencies, and conventions. According to the variability of metadata, a compatible physical sensor model approach must be constructed. Among the three component of the sensor model, i.e., trajectory model, projection equations, and parameter subset selection, the construction of the position and attitude trajectory is closely linked with the availability and type of support data. In this paper, we show how trajectory models can be implemented based on support data from six satellite image types: QuickBird, Hyperion, SPOT-3, ASTER. PRISM, and EROS-A. Triangulation for each image is implemented to investigate the feasibility and suitability of the different trajectory models. The results show the effectiveness of some of the simple models while indicating that careful use of dense ephemeris information is necessary. These results are based on having a number of high quality ground control points. Copyright ASPRS Numéro de notice : A2010-088 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.76.3.265 En ligne : https://doi.org/10.14358/PERS.76.3.265 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30284 [article]

A mathematical expression for stereoscopic depth perception / H. Rosas in Photogrammetric Engineering & Remote Sensing, PERS, vol 76 n° 3 (March 2010)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 76 n° 3 (March 2010) . - pp 301 - 306 Titre : A mathematical expression for stereoscopic depth perception Type de document : Article/Communication Auteurs : H. Rosas, Auteur ; W. Vargas, Auteur ; A. Ceron, Auteur ; et al., Auteur Année de publication : 2010 Article en page(s) : pp 301 - 306 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] exagération de forme [Termes IGN] géométrie projective [Termes IGN] modèle stéréoscopique [Termes IGN] perception [Termes IGN] profondeur Résumé : (Auteur) The metric nature of stereoscopic depth perception has remained an enigma. Several mathematical formulations proposed for measuring the stereoscopic effect have not shown to be reliable. This may be due to the lack of a conceptual distinction between the 3D model geometrically obtained by intersection of visual rays (geometric model), and the 3D model perceived in the observer's mind (perceptual model). Based on the assumption that retinal parallax is the only source of information on depth available to the brain, we developed an equation that shows real and perceptual space to be connected by a logarithmic function. This relationship has allowed us to formulate the vertical exaggeration for all sorts of stereoscopic conditions, including natural stereovision. The obtained formulations might involve possibilities of technological applications, such as the artificial recreation of a natural stereovision effect, ant the design of stereoscopic instruments with a desired degree of vertical exaggeration. Copyright ASPRS Numéro de notice : A2010-089 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.76.3.301 En ligne : https://doi.org/10.14358/PERS.76.3.301 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30285 [article]