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Augmented paper maps: Exploring the design space of a mixed reality system / Volker Paelke in ISPRS Journal of photogrammetry and remote sensing, vol 65 n° 3 (May - June 2010)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 65 n° 3 (May - June 2010) . - pp 256 - 265 Titre : Augmented paper maps: Exploring the design space of a mixed reality system Type de document : Article/Communication Auteurs : Volker Paelke, Auteur ; Monika Sester, Auteur Année de publication : 2010 Article en page(s) : pp 256 - 265 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Cartographie numérique [Termes IGN] appareil portable [Termes IGN] carte [Termes IGN] réalité augmentée [Termes IGN] service fondé sur la position Résumé : (Auteur) Paper maps and mobile electronic devices have complementary strengths and shortcomings in outdoor use. In many scenarios, like small craft sailing or cross-country trekking, a complete replacement of maps is neither useful nor desirable. Paper maps are fail-safe, relatively cheap, offer superior resolution and provide large scale overview. In uses like open-water sailing it is therefore mandatory to carry adequate maps/charts. GPS based mobile devices, on the other hand, offer useful features like automatic positioning and plotting, real-time information update and dynamic adaptation to user requirements. While paper maps are now commonly used in combination with mobile GPS devices, there is no meaningful integration between the two, and the combined use leads to a number of interaction problems and potential safety issues. In this paper we explore the design space of augmented paper maps in which maps are augmented with additional functionality through a mobile device to achieve a meaningful integration between device and map that combines their respective strengths. Numéro de notice : A2010-174 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2009.05.006 En ligne : https://doi.org/10.1016/j.isprsjprs.2009.05.006 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30369 [article]

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An evaluation of measures for quantifying map information / Lars Harrie in ISPRS Journal of photogrammetry and remote sensing, vol 65 n° 3 (May - June 2010)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 65 n° 3 (May - June 2010) . - pp 266 - 274 Titre : An evaluation of measures for quantifying map information Type de document : Article/Communication Auteurs : Lars Harrie, Auteur ; Hanna Stigmar, Auteur Année de publication : 2010 Article en page(s) : pp 266 - 274 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Bases de données localisées [Termes IGN] diagramme de Voronoï [Termes IGN] évaluation des données [Termes IGN] généralisation à la volée [Termes IGN] objet cartographique Résumé : (Auteur) A real-time map must not contain too much information. Therefore, we need measures of map information that could be guidelines for the selection of data layers and the real-time generalisation process. In this paper we evaluate measures of the amount of information and the distribution of information. The evaluation is performed by (1) defining measures, (2) implementing the measures, (3) computing the measures for some test maps, and finally (4) comparing the values of the measures with human judgement of the map information. For amount of information, we found that the measures number of objects, number of points and object line length had better correspondence with human judgement than object area. We also found that measures based on the size of Voronoi regions of objects (respectively points) can be used for identifying the distribution of information. The results are based on the testing of only building objects. Future work should extend the test, using all object types. Numéro de notice : A2010-175 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2009.05.004 En ligne : https://doi.org/10.1016/j.isprsjprs.2009.05.004 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30370 [article]

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The development of an integrated technical-methodical approach to visualise hydrological processes in an exemplary post-mining area in Central Germany / C. Glässer in ISPRS Journal of photogrammetry and remote sensing, vol 65 n° 3 (May - June 2010)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 65 n° 3 (May - June 2010) . - pp 275 - 281 Titre : The development of an integrated technical-methodical approach to visualise hydrological processes in an exemplary post-mining area in Central Germany Type de document : Article/Communication Auteurs : C. Glässer, Auteur ; D. Thürkow, Auteur ; C. Dette, Auteur ; S. Scheuer, Auteur Année de publication : 2010 Article en page(s) : pp 275 - 281 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG [Termes IGN] Allemagne [Termes IGN] données multitemporelles [Termes IGN] géomatique web [Termes IGN] hydrographie de surface [Termes IGN] mine [Termes IGN] paysage [Termes IGN] visualisation de données Résumé : (Auteur) The rapid development of software and hardware during the last decade caused a paradigm change in data processing. That is why, in geosciences, monolithic GIS systems are increasingly complemented by web-based services and multimedia content, while geovisualisation is becoming more popular to visualise and analyse geoscientific processes. An increasing realism in geovisualisations tends to result in more complex geodata and metadata, requiring sophisticated solutions for efficient data management. This paper describes an integrated approach to geographic data processing and geovisualisation in an open, modular system. A former open-pit mining area in Central Germany characterised by a highly dynamic landscape and rapidly changing natural and anthropogenic processes has been chosen as an exemplary test site. Here, geovisualisation is used to depict the extreme changes in the landscape. The focus is on hydrological processes, which are highly complex and difficult to comprehend. The described approach will show how heterogeneous data can be used to support the understanding and transfer of knowledge. Numéro de notice : A2010-176 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2009.11.002 En ligne : https://doi.org/10.1016/j.isprsjprs.2009.11.002 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30371 [article]

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An automatic mosaicking method for building facade texture mapping using a monocular close-range image sequence / Z. Kang in ISPRS Journal of photogrammetry and remote sensing, vol 65 n° 3 (May - June 2010)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 65 n° 3 (May - June 2010) . - pp 282 - 293 Titre : An automatic mosaicking method for building facade texture mapping using a monocular close-range image sequence Type de document : Article/Communication Auteurs : Z. Kang, Auteur ; L. Zhang, Auteur ; Sisi Zlatanova, Auteur ; J. Li, Auteur Année de publication : 2010 Article en page(s) : pp 282 - 293 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie terrestre [Termes IGN] correction géométrique [Termes IGN] étalonnage de capteur (imagerie) [Termes IGN] façade [Termes IGN] image terrestre [Termes IGN] mosaïquage d'images [Termes IGN] photogrammétrie métrologique [Termes IGN] séquence d'images [Termes IGN] texturage Résumé : (Auteur) This paper presents an automatic mosaicking method for generating building facade textures from a monocular close-range digital image sequence. The process begins with the computation of the camera parameters (except the coordinates of the projective center), which are determined by combining vanishing point geometry with constraints of a straight line bundle as well as prior information of parallel lines in object space. The raw images are later rectified for the purpose of eliminating their salient geometric distortion. Next, automatic retrieval of the relevant image segment is implemented using the detecting range variance by means of the histogram of projective differences between the corresponding points for each of the facades from the raw image sequence. A strip model of the least-squares adjustment, which is similar to the strip block adjustment in aerial triangulation, is employed to determine the spatial alignment of each of the image segments in order to generate the facade textures from the relevant image segments. Afterwards, the entire building facade texture is mosaicked by ortho-image generation. Two refining strategies are proposed to optimize the mosaic result. One is refining the mosaic region where corresponding points are difficult to match but plenty of horizontal lines are available, and the constraint of corresponding horizontal lines is introduced to implement this process. The other strategy is to refine the unsatisfactory mosaic region by densifying the corresponding points by means of the spatial alignment of the relevant image segment computed by the strip method. The experimental results indicate that this method is widely applicable and compares well with other reported approaches with regard to automation level and applicability, for uncalibrated images as well as images with large geometric distortions. Numéro de notice : A2010-177 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2009.11.003 En ligne : https://doi.org/10.1016/j.isprsjprs.2009.11.003 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30372 [article]

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Addressing the value of art in cartographic communication / William Cartwright in ISPRS Journal of photogrammetry and remote sensing, vol 65 n° 3 (May - June 2010)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 65 n° 3 (May - June 2010) . - pp 294 - 299 Titre : Addressing the value of art in cartographic communication Type de document : Article/Communication Auteurs : William Cartwright, Auteur Année de publication : 2010 Article en page(s) : pp 294 - 299 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] art [Termes IGN] cartologie [Termes IGN] communication cartographique [Termes IGN] conception cartographique [Vedettes matières IGN] Cartologie Résumé : (Auteur) Contemporary methods for depicting the earth and its cultural and natural attributes use graphic and non-graphic formats, maps and map-related artefacts, for visualizing geography and building virtual landscapes and environments. The discipline area of cartography, traditionally, has applied art (design), science and technology to map making to design and realise these products. Prior to the mid-1950s, cartographic artefacts were built under the theoretical and practical ‘umbrella’ of this partnership of art, science and technology. However, since then, the theory and methodology associated with visualizing geography has focused on Science and Technology, and away from Art. This ‘move’ away from art was accelerated by: (1) computing, computers and complete automated systems; and (2) the ‘quest’ to gain ‘scientific legitimacy’ by using scientific visualization as a lodestone for gauging the ‘quality’ of theories and applications. Science and Technology has been embraced by cartography as a means to ensure that what is presented is scientifically ‘correct’ — products are considered to ‘work’ if they are scientifically ‘elegant’, ‘technologically’ ‘buildable’ and ‘deliverable’ using contemporary communication systems. But, it is argued, science or technology, need not always take on primary roles, and there now is a need to address the role that design should take to facilitate the further development of contemporary cartography, especially in the areas where new media has been applied to facilitate the building of geographical visualization tools. This paper will address how, by incorporating art elements into the design criteria of geographical visualization artefacts, ‘different’ visualization tools might be provided using all three elements of cartography: art, science and technology. Numéro de notice : A2010-178 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2010.01.004 En ligne : https://doi.org/10.1016/j.isprsjprs.2010.01.004 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30373 [article]

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Analytical 3D views and virtual globes: scientific results in a familiar spatial context / D. Tiede in ISPRS Journal of photogrammetry and remote sensing, vol 65 n° 3 (May - June 2010)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 65 n° 3 (May - June 2010) . - pp 300 - 307 Titre : Analytical 3D views and virtual globes: scientific results in a familiar spatial context Type de document : Article/Communication Auteurs : D. Tiede, Auteur ; S. Lang, Auteur Année de publication : 2010 Article en page(s) : pp 300 - 307 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Information géographique [Termes IGN] analyse spatiale [Termes IGN] extraction de données [Termes IGN] filtrage d'information [Termes IGN] géomatique web [Termes IGN] globe virtuel [Termes IGN] information complexe [Termes IGN] vue 3D Résumé : (Auteur) In this paper we introduce analytical three-dimensional (3D) views as a means for effective and comprehensible information delivery, using virtual globes and the third dimension as an additional information carrier. Four case studies are presented, in which information extraction results from very high spatial resolution (VHSR) satellite images were conditioned and aggregated or disaggregated to regular spatial units. The case studies were embedded in the context of: (1) urban life quality assessment (Salzburg/Austria); (2) post-disaster assessment (Harare/Zimbabwe); (3) emergency response (Lukole/Tanzania); and (4) contingency planning (faked crisis scenario/Germany). The results are made available in different virtual globe environments, using the implemented contextual data (such as satellite imagery, aerial photographs, and auxiliary geodata) as valuable additional context information. Both day-to-day users and high-level decision makers are addressees of this tailored information product. The degree of abstraction required for understanding a complex analytical content is balanced with the ease and appeal by which the context is conveyed. Numéro de notice : A2010-179 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2009.12.002 En ligne : https://doi.org/10.1016/j.isprsjprs.2009.12.002 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30374 [article]

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Color correction of texture images for true photorealistic visualization / Y. Song in ISPRS Journal of photogrammetry and remote sensing, vol 65 n° 3 (May - June 2010)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 65 n° 3 (May - June 2010) . - pp 308 - 315 Titre : Color correction of texture images for true photorealistic visualization Type de document : Article/Communication Auteurs : Y. Song, Auteur ; J. Shan, Auteur Année de publication : 2010 Article en page(s) : pp 308 - 315 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image [Termes IGN] correction radiométrique [Termes IGN] réalité virtuelle [Termes IGN] texturage [Termes IGN] texture d'image [Termes IGN] visualisation de données Résumé : (Auteur) Photorealistic visualization combines 3-D geometric models with their texture images to render the virtual world. This paper points out that the texture images should be radiometrically corrected to achieve a true realistic appearance. Such a correction should include not only the color adjustment among images of the same object, but also the shade variation caused by the illumination change. The objective of this study is to correct the input texture images such that their shade varies when being rendered under different illumination directions. To achieve this goal we first apply the specular-to-diffuse mechanism based on the dichromatic reflection model to remove the specular component from the texture image. The resultant diffusion-only image then undergoes a shade correction to produce a normalized shade-free texture image. In the final step, shades under any illumination are produced to achieve a true photorealistic effect. Presented in the paper are the principles and methods for such corrections, along with a performance evaluation based on the graphic and numerical results for roof texture images. Numéro de notice : A2010-180 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2010.01.003 En ligne : https://doi.org/10.1016/j.isprsjprs.2010.01.003 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30375 [article]

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