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Comparison of pixel-based and object-oriented image classification approaches: a case study in a coal fire area, Wuda, Inner Mongolia, China / G. Yan in International Journal of Remote Sensing IJRS, vol 27 n°18 - 19 - 20 (October 2006)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 27 n°18 - 19 - 20 (October 2006) . - pp 4039 - 4055 Titre : Comparison of pixel-based and object-oriented image classification approaches: a case study in a coal fire area, Wuda, Inner Mongolia, China Type de document : Article/Communication Auteurs : G. Yan, Auteur ; J.F. Mas, Auteur ; B.H. Maathuis, Auteur ; et al., Auteur Année de publication : 2006 Article en page(s) : pp 4039 - 4055 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] carte d'occupation du sol [Termes IGN] charbon [Termes IGN] classification orientée objet [Termes IGN] classification par maximum de vraisemblance [Termes IGN] image Terra-ASTER [Termes IGN] incendie [Termes IGN] précision de la classification Résumé : (Auteur) Pixel-based and object-oriented classifications were tested for land-cover mapping in a coal fire area. In pixel-based classification a supervised Maximum Likelihood Classification (MLC) algorithm was utilized; in object-oriented classification, a region-growing multi-resolution segmentation and a soft nearest neighbour classifier were used. The classification data was an ASTER image and the typical area extent of most land-cover classes was greater than the image pixels (15 m). Classification results were compared in order to evaluate the suitability of the two classification techniques. The comparison was undertaken in a statistically rigorous way to provide an objective basis for comment and interpretation. Considering consistency, the same set of ground data was used for both classification results for accuracy assessment. Using the object-oriented classification, the overall accuracy was higher than the accuracy obtained using the pixel-based classification by 36.77%, and the user’s and producer’s accuracy of almost all the classes were also improved. In particular, the accuracy of (potential) surface coal fire areas mapping showed a marked increase. The potential surface coal fire areas were defined as areas covered by coal piles and coal wastes (dust), which are prone to be on fire, and in this context, indicated by the two land-cover types ‘coal’ and ‘coal dust’. Taking into account the same test sites utilized, McNemar’s test was used to evaluate the statistical significance of the difference between the two methods. The differences in accuracy expressed in terms of proportions of correctly allocated pixels were statistically significant at the 0.1% level, which means that the thematic mapping result using object-oriented image analysis approach gave a much higher accuracy than that obtained using the pixel-based approach. Copyright Taylor & Francis Numéro de notice : A2006-461 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431160600702632 En ligne : https://doi.org/10.1080/01431160600702632 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28185 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
080-06101	RAB	Revue	Centre de documentation	En réserve L003	Disponible

A review of satellite and airborne sensors for remote sensing based detection of minefields and landmines / B.H. Maathuis in International Journal of Remote Sensing IJRS, vol 25 n° 23 (December 2004)  

Public [article]  inInternational Journal of Remote Sensing IJRS > vol 25 n° 23 (December 2004) . - pp 5201 - 5245 Titre : A review of satellite and airborne sensors for remote sensing based detection of minefields and landmines Type de document : Article/Communication Auteurs : B.H. Maathuis, Auteur ; John L. Van Genderen, Auteur Année de publication : 2004 Article en page(s) : pp 5201 - 5245 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] capteur aérien [Termes IGN] capteur spatial [Termes IGN] chambre DTC [Termes IGN] image Landsat-ETM+ [Termes IGN] Landsat [Termes IGN] longueur d'onde [Termes IGN] mine antipersonnel [Termes IGN] rayonnement proche infrarouge [Termes IGN] SPOT Résumé : (Auteur) This paper focuses on the use of space and airborne sensors that can be applied to detect landmines and minefields. First the landmine and minefield problem is addressed and examples of the use of remote sensing images are presented that could provide valuable information for the mine action process and assist in conventional minefield and landmine detection methods. This is followed by an overview on relevant (declassified) aspects related to strategic overhead detection techniques developed by the military/intelligence community as well as those of civilian space and airborne remote sensing programmes. The airborne sensing techniques describe the state of the art of sensors such as optical (film, multi- and hyperspectral sensors), thermal infrared as well as microwave sensors and their suitability-limitations for remote sensing based minefield and landmine detection purposes. Numéro de notice : A2004-468 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/01431160412331270803 En ligne : https://doi.org/10.1080/01431160412331270803 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=26988 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
080-04211	RAB	Revue	Centre de documentation	En réserve L003	Exclu du prêt

Remote sensing based detection of minefields / B.H. Maathuis in Geocarto international, vol 18 n° 1 (March - May 2003)  

Public [article]  inGeocarto international > vol 18 n° 1 (March - May 2003) . - pp 51 - 60 Titre : Remote sensing based detection of minefields Type de document : Article/Communication Auteurs : B.H. Maathuis, Auteur Année de publication : 2003 Article en page(s) : pp 51 - 60 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] armement [Termes IGN] guerre [Termes IGN] image à basse résolution [Termes IGN] image multitemporelle [Termes IGN] image satellite [Termes IGN] photographie aérienne [Termes IGN] risque majeur [Termes IGN] Zimbabwe Résumé : (Auteur) In this article the use of remote sensing techniques to locate minefields over a number of selected areas in Zimbabwe is discussed, representing different types of landmine deployment, climatic zones, natural environments, etc. In order to detect the minefields use is made of indirect indicators as the detail of the images did not allow direct identification of landmines. The work conducted is focussing on the suitability of multitemporal aerial photographs and satellite images for the detection of minefields together with ancillary (conflict) information. Analysis of the images acquired showed that, even at lower spatial resolutions, but through the use of multitemporal images, important minefield related indicators could be identified, providing important information for the mine action process. For validation of the interpretations use was made of a minefield map book that was available for these border minefields. Numéro de notice : A2003-105 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1080/10106040308542263 En ligne : https://doi.org/10.1080/10106040308542263 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22401 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
059-03011	RAB	Revue	Centre de documentation	En réserve L003	Disponible