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Titre : Lessons learned from research on multimedia summarization Type de document : Article/Communication Auteurs : Guillaume Touya , Auteur Editeur : International Cartographic Association ICA - Association cartographique internationale ACI Année de publication : 2015 Conférence : ICA 2015, 18th workshop, Commission on Generalisation and Multiple Representation 21/08/2015 Rio de Janeiro Brésil open access proceedings Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] généralisation automatique de données
[Vedettes matières IGN] GénéralisationMots-clés libres : benchmark evaluation learning summarization Résumé : (auteur) [introduction] Map generalization is often considered as a cognitive task similar to text summary. Like text summary, generalization seeks to reduce the level of detail of initial data, highlighting the important features regarding a given need, and preserving the main characteristics of the initial data (Ruas 2002). The automation of text summarization is key research topic for language processing scientists, and it should be interesting to verify if the similarities in the human cognitive process lead to similarities in the automation techniques. Moreover, text summarization is a part of the multimedia summarization problem that also includes video and music summarization, and this complete literature is interesting to review. The aim of the paper is also to identify some guidelines for further map generalization research that can be derived from the multimedia summarization research community. This paper first identifies similarities and differences in both automation problems. Then, section 3 proposes ideas from multimedia summarization that could be beneficial for the map generalization community. Finally, the paper is concluded with some ideas for further research opportunities. Numéro de notice : C2015-037 Affiliation des auteurs : LASTIG COGIT (2012-2019) Thématique : GEOMATIQUE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : sans En ligne : http://generalisation.icaci.org/index.php/prevevents/11-previous-events-details/ [...] Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83249 Documents numériques
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Lessons learned - slidesAdobe Acrobat PDF en open access
Lessons learned - texteAdobe Acrobat PDF
contenu dans ICC'15, 27th International Cartographic Conference, Rio de Janeiro, Brazil / International cartographic association = association cartographique internationale (2015)
Titre : Sliding from imagery realism to topographic abstraction Type de document : Article/Communication Auteurs : Charlotte Hoarau , Auteur ; Sidonie Christophe , Auteur ; Sébastien Mustière , Auteur Editeur : International Cartographic Association ICA - Association cartographique internationale ACI Année de publication : 2015 Projets : Mapstyle / Christophe, Sidonie Conférence : ICC 2015, 27th International Cartographic Conference, 16th General Assembly 23/08/2015 28/08/2015 Rio de Janeiro Brésil open access proceedings Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] niveau d'abstraction
[Termes IGN] rendu réaliste
[Vedettes matières IGN] GéovisualisationRésumé : (auteur) As the amount of cartographic representations dramatically rise, cartographers are incited to merge them into mixed cartographic representations. We identify two widespread design trends among such representations: a higher level of realism and an increasing use of imagery background. Moreover, current geovisualization applications provide interactive covisualization tools such as sliders, swipes, magnifiers, lenses or anchored windows that allow users to explore two cartographic representations simultaneously. Some related research works focus on the realism level of cartographic representations, while designing semi-realistic symbols (Jenny & Jenny 2014, Patterson 2002) or while integrating imagery data (Raposo 2014). Indeed, (Boer et al. 2013) foresee the impact of the realism level on the fitness for use of such representations. Our work aims at creating a cartographic continuum enabling users to navigate from an imagery based representation to a topographic map. An important issue of this work is to provide automatic design methods to build in-between cartographic representations. It takes up different challenges. First, we intend to preserve the readability of relevant cartographic elements in each in-between representation. Second, we aim at providing smooth transitions ensuring the continuity between consecutive representations of our continuum. Finally, we look for adapting promising computer graphics rendering methods such as texturing, shading or blending modes to our design issues. We propose elementary rendering methods to rise these design challenges. Progressive symbolization methods allow smooth transitions by using progressive transparency or procedural texturing methods, or by applying color morphing between, on the one hand, bright and artificial map colors and, and on the other hand, natural and unsaturated imagery colors. Adaptive symbolization methods provide road or label symbolizations that are locally contrasted regarding imagery background colors. The objective is to take into account the visual diversity and complexity of imagery backgrounds. Our elementary rendering methods provide symbolization specifications for each cartographic theme independently, or depending on the background layer. In order to create a consistent cartographic continuum and build complete in-between representations, these elementary methods have been combined into a global cartographic process. The calibration of the relative realism levels our elementary rendering method outputs have been guided by a user visual test in order to ensure an homogeneous level of realism for the whole representation. Our work further contributes to the formalisation of the concept of in-between cartographic representation which could be used to build other continuums (through seasonal representations or artistic styles for exemple), the proposal of cartographic rendering methods inspired by computer graphics and the conception of geovisualization tools to browse in-between representations from a topographic map to an imagery based cartographic representation. Note de contenu : abstract. Numéro de notice : C2015-026 Affiliation des auteurs : LASTIG COGIT (2012-2019) Thématique : GEOMATIQUE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : sans En ligne : https://icaci.org/files/documents/ICC_proceedings/ICC2015/papers/2/fullpaper/T2- [...] Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83284 Documents numériques
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Sliding from imagery realism - AbstractAdobe Acrobat PDF
contenu dans ICC'15, 27th International Cartographic Conference, Rio de Janeiro, Brazil / International cartographic association = association cartographique internationale (2015)
Titre : A system to apply cartographic practices on 3D renderings Type de document : Article/Communication Auteurs : Mickaël Brasebin , Auteur ; Elodie Buard , Auteur ; Sidonie Christophe , Auteur ; Florian Pelloie, Auteur Editeur : International Cartographic Association ICA - Association cartographique internationale ACI Année de publication : 2015 Conférence : ICC 2015, 27th International Cartographic Conference, 16th General Assembly 23/08/2015 28/08/2015 Rio de Janeiro Brésil open access proceedings Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Termes IGN] données localisées 3D
[Termes IGN] rendu réaliste
[Termes IGN] style cartographique
[Termes IGN] symbole graphique 3D
[Termes IGN] variable visuelle
[Vedettes matières IGN] GéovisualisationRésumé : (auteur) 3D renderings are used and abused, notably for public consultation concerning urban projects. As 3D semiotics is not clearly defined (Häberling, 2008), the impact of graphic parameters (e.g. material color or light) of such renderings on public understanding and perception is not controlled. On the contrary, in cartographic domain, good practices based on a set of visual variables have been recommended by (Bertin, 1982) in order to ensure understandable cartographic messages. The aim of our work is to use and revisit these practices to apply them on 3D renderings and thus to create 3D semiotics. In this contribution, we introduce an original generic method to assess styles of 3D renderings. The first step is to define 3D styles. We analyse graphic parameters of each geographic features composing the rendering (e.g. sidewalk, tree trunk, house roof or door). Four categories of styles are highlighted combining two pairs of characteristics, level of details and level of photorealism: detailed representation vs non-detailed representation and photorealistic representation (PR) vs non-photorealistic representation (NPR). In order to illustrate these four categories, a collection of 3D renderings, from urban projects focused on one building, has been set up. Each rendering can then be systematically described and categorized into theses categories, pointing out the graphic parameters that participate to the categories. As an example, it turns out that window transparency and absence of edging increase photorealism perception. In a second step, we want to navigate automatically between the styles belonging to these categories, for a same rendering. For that, transformations between renderings are described into elementary modifications of graphic parameters and traduced into visual variables in using the matrix proposed in (Jobst, 2008). For example, for a tested transformation between NP to NPR styles, hue, grain and value visual variables are modified. In future work, the undertaken method could be improved in extracting automatically necessary graphic parameters. In the long term, we aim to create methods to automatically change styles (3D or even 2D) according to the context of users and purposes. For that, we could apply and study other types of cartographic practices, not only based on visual variables, but concerning: identification of thematic relationships between geographic features in the rendering, rules to preserve readability of neighbour features using color, shape or style contrasts or adding thematic qualitative or quantitative informations. As for the users, our objective is to provide them tools to create 3D renderings with a specific style and relevant to their objectives. Numéro de notice : C2015-023 Affiliation des auteurs : LASTIG COGIT (2012-2019) Thématique : GEOMATIQUE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : sans En ligne : https://icaci.org/files/documents/ICC_proceedings/ICC2015/papers/31/index.html Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83161 Documents numériques
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A system to apply cartographic practices ... - pdf auteurMS word document
Titre : Designing maps from texts Type de document : Article/Communication Auteurs : Geoffrey Brun , Auteur ; Catherine Dominguès , Auteur Editeur : International Cartographic Association ICA - Association cartographique internationale ACI Année de publication : 2013 Conférence : ICC 2013, 26th International Cartographic Conference ICA 25/08/2013 30/08/2013 Dresde Allemagne OA proceedings Note générale : bibliographie Langues : Anglais (eng) Résumé : (auteur) Semiology teaches us that maps as texts express ideas. In this thesis work which is still in progress, we focus on maps which come with texts. In this particular case, texts and maps are supposed to express the same ideas. The point is to help users to make map which conveys the same message than the text it accompanies. A map may be seen as the result of the application of a key map to a geographic dataset. Although information about relevant dataset can be found in the text, this workonly talks about the key map. Numéro de notice : C2013-064 Affiliation des auteurs : COGIT (1988-2011) Thématique : GEOMATIQUE Nature : Communication DOI : sans En ligne : https://icaci.org/files/documents/ICC_proceedings/ICC2013/_extendedAbstract/397_ [...] Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=101198 Designing origin-destination flow matrices from individual mobile phone paths : the effect of spatiotemporal filtering on flow measurement / Françoise Bahoken (2013)
contenu dans Proceedings of the 26th International Cartographic Conference, ICC '13 [ICC 2013] / Manfred F. Buchroithner (2013)
Titre : Designing origin-destination flow matrices from individual mobile phone paths : the effect of spatiotemporal filtering on flow measurement Type de document : Article/Communication Auteurs : Françoise Bahoken, Auteur ; Ana-Maria Olteanu-Raimond , Auteur Editeur : International Cartographic Association ICA - Association cartographique internationale ACI Année de publication : 2013 Conférence : ICC 2013, 26th International Cartographic Conference ICA 25/08/2013 30/08/2013 Dresde Allemagne OA proceedings Importance : pp 358 Format : 21 x 30 cm Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géomatique
[Termes IGN] cartographie des flux
[Termes IGN] filtrage spatiotemporel
[Termes IGN] migration pendulaire
[Termes IGN] mobilité urbaine
[Termes IGN] origine - destination
[Termes IGN] téléphonie mobile
[Termes IGN] trace numériqueRésumé : (auteur) In the past few years the mobile phone data are considered as a useful complementary source of information for human mobility research. In this paper, we focus on the computation of the Origin Destination matrix using mobile phone data. First, a new approach of OD matrix design which takes into account the spatiotemporal heterogeneities of mobile phone data is proposed. Second, some analysis allowing measuring the effect of spatio-temporal filtering on the OD matrix results are carried out. Numéro de notice : C2013-019 Affiliation des auteurs : LASTIG COGIT+Ext (2012-2019) Thématique : GEOMATIQUE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : sans En ligne : http://icaci.org/files/documents/ICC_proceedings/ICC2013/_extendedAbstract/393_p [...] Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80116 Documents numériques
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