Centre de documentation
scientifique

Dépouillements

Synergetic fusion of GPS and photogrammetrically generated elevation models / Jon P. Mills in Photogrammetric Engineering & Remote Sensing, PERS, vol 69 n° 4 (April 2003)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 69 n° 4 (April 2003) . - pp 341 - 349 Titre : Synergetic fusion of GPS and photogrammetrically generated elevation models Type de document : Article/Communication Auteurs : Jon P. Mills, Auteur ; S.J. Buckley, Auteur ; H.L. Mitchell, Auteur Année de publication : 2003 Article en page(s) : pp 341 - 349 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] appariement géométrique [Termes IGN] coût [Termes IGN] données GPS [Termes IGN] erreur systématique [Termes IGN] fusion de données [Termes IGN] GPS en mode cinématique [Termes IGN] image numérique [Termes IGN] méthode des moindres carrés [Termes IGN] modèle numérique de surface [Termes IGN] orientation relative [Termes IGN] photographie aérienne [Termes IGN] point d'appui [Termes IGN] restitution Résumé : (Auteur) Digital elevation models (DEMs) produced from photogrammetric data sources have long relied on the use of ground control points to give them scale and orientation. However, in areas such as coastlines, landslides, or glaciers, where identification of suitable natural features and premarking is difficult, the use of conventional ground control may be unfeasible. This paper reports on research that uses independently collected DEMs derived from kinematic GPS to orient surfaces produced by aerial photogrammetric methods, using a leastsquares surface matching algorithm. During algorithm development, three stages of testing were carried out, Using increasingly more complex datasets. Initially, simulated surfaces were used to validate the matching theory and program. Then, a DEM derived from conventional aerial photography was matched with a GPS model, highlighting the effectiveness of surface matching to recover systematic errors in datosets. Finally, surfaces derived from small format digital imagery were successfully fused with wireframe GPS surfaces, the high redundancy and automation potential creating an elegant and cheaper alternative to photocontrol. Numéro de notice : A2003-109 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.69.4.341 En ligne : https://doi.org/10.14358/PERS.69.4.341 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22405 [article]

Remote sensing texture analysis using multi-parameter and multi-scale features / Y. Li in Photogrammetric Engineering & Remote Sensing, PERS, vol 69 n° 4 (April 2003)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 69 n° 4 (April 2003) . - pp 351 - 355 Titre : Remote sensing texture analysis using multi-parameter and multi-scale features Type de document : Article/Communication Auteurs : Y. Li, Auteur ; J.X. Peng, Auteur Année de publication : 2003 Article en page(s) : pp 351 - 355 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique [Termes IGN] analyse texturale [Termes IGN] classification [Termes IGN] détail topographique [Termes IGN] données multiéchelles [Termes IGN] estimation des paramètres [Termes IGN] image SPOT [Termes IGN] mouvement brownien [Termes IGN] texture d'image Résumé : (Auteur) A new multiparameter and multiscale (MPMS) feature set derived from fractional Brownian motion (fBm) is presented in this paper. Generally, natural textures can be modeled as fBm processes. Because fBm is characterized by a single Hurst parameter, it is not flexible enough to be used as the texture feature in classification. Therefore, an extended model is proposed, where the Hurst parameter H is no longer constant for all the scales. The shape and location of the estimation curve, when presented graphically, are fixed for a particular texture. We use the slopes of sections of the estimation curve to estimate the multiscale Hurst parameters. Meanwhile, the unit displacement incremental power (UDIP) a' is also taken as the parameter of the process. It determines the vertical placement of the curve in the graph. Experiments prove that the MPMS feature set has advantages over some other features in the classification of SPOT images. Numéro de notice : A2003-110 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.69.4.351 En ligne : https://doi.org/10.14358/PERS.69.4.351 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22406 [article]

Comparing texture analysis methods through classification / P. Maillard in Photogrammetric Engineering & Remote Sensing, PERS, vol 69 n° 4 (April 2003)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 69 n° 4 (April 2003) . - pp 357 - 367 Titre : Comparing texture analysis methods through classification Type de document : Article/Communication Auteurs : P. Maillard, Auteur Année de publication : 2003 Article en page(s) : pp 357 - 367 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] analyse comparative [Termes IGN] analyse texturale [Termes IGN] classification [Termes IGN] niveau de gris (image) [Termes IGN] test de performance [Termes IGN] texture d'image [Termes IGN] transformation de Fourier [Termes IGN] variogramme Résumé : (Auteur) The development and testing of two techniques of texture analysis based on different mathematical tools : the semivariogram and the Fourier spectra, are presented. These are also compared against a benchmark approach : the GrayLevel Cooccurrence Matrix. The three methods and their implementation are briefly described. Three series of experiments have been prepared to test the performance of these methods in various classification contexts. These contexts are simulated by vaiying the number, type and visual likeness of the texture patches used in classification tests. More specifically, their ability to correctly classify, separate, and associate texture patches is assessed. Results suggest that the classification context has an important impact on performance rates of all methods. The variogram-based and the GrayTone Dependency Matrix methods were generally superior, each one in particular contexts. Numéro de notice : A2003-111 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.69.4.357 En ligne : https://doi.org/10.14358/PERS.69.4.357 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22407 [article]

Demonstrating UVA-acquired real-time thermal data of fires / V.G. Ambrosia in Photogrammetric Engineering & Remote Sensing, PERS, vol 69 n° 4 (April 2003)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 69 n° 4 (April 2003) . - pp 391 - 402 Titre : Demonstrating UVA-acquired real-time thermal data of fires Type de document : Article/Communication Auteurs : V.G. Ambrosia, Auteur ; S.S. Wegener, Auteur ; D.V. Sullivan, Auteur ; et al., Auteur Année de publication : 2003 Article en page(s) : pp 391 - 402 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] capteur à balayage [Termes IGN] capteur imageur [Termes IGN] drone [Termes IGN] image thermique [Termes IGN] incendie [Termes IGN] orthoimage [Termes IGN] orthorectification [Termes IGN] plateforme [Termes IGN] prévention des risques [Termes IGN] rayonnement infrarouge thermique [Termes IGN] risque naturel [Termes IGN] surveillance écologique [Termes IGN] système d'information géographique [Termes IGN] télémétrie laser [Termes IGN] temps réel [Termes IGN] transmission de données Résumé : (Auteur) Project FiRE (First Response Experiment), a disaster management technology demonstration, was performed in 2001. The experiment demonstrated the use of a thermal multispectral scanning imager, integrated on an unmanned aerial vehicle (UAV), a satellite uplink/downlink image data telemetry system, and nearrealtime georectification of the resultant imagery for data distribution via the Internet to disaster managers. The FiRE demonstration provided geocorrected image data over a controlled burn to a fire management community in nearrealtime by means of the melding of new technologies. The use of the UAV demonstrated remotely piloted flight (thereby reducing the potential for loss of human life during hazardous missions), and the ability to "linger and stare " over the fire for extended periods of time (beyond the capabilities of humanpilot endurance). Improvements in a high temperature calibrated thermal imaging scanner allowed "remote" operations from a UAV and provided realtime accurate fire information collection over a controlled burn. Improved bitrate capacity telemetry capabilities increased the amount, structure, and information content of the image data relayed to the ground. The integration of precision navigation instrumentation allowed improved accuracies in georectification of the resultant imagery, easing data ingestion and overlay in a GIS framework. We present a discussion of the feasibility of utilizing new platforms, improved sensor configurations, improved telemetry, and new geocorrection software to facilitate wildfire management and mitigation strategies. Numéro de notice : A2003-112 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.69.4.391 En ligne : http://dx.doi.org/10.14358/PERS.69.4.391 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22408 [article]