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Projective texturing uncertain geometry: silhouette-aware box-filtered blending using integral radial images / Mathieu Brédif (2016)
Titre : Projective texturing uncertain geometry: silhouette-aware box-filtered blending using integral radial images Type de document : Article/Communication Auteurs : Mathieu Brédif , Auteur Editeur : Saint-Mandé : Institut national de l'information géographique et forestière - IGN (2012-) Année de publication : 2016 Projets : iSpace&Time / Brédif, Mathieu Conférence : JFIG 2016, 29èmes Journées Française d’Informatique Graphique de l'AFIG, du GdR IG-RV du CNRS et du Chapitre Français d’EG 30/11/2016 02/12/2016 Grenoble France Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image
[Termes IGN] filtre passe-bas
[Termes IGN] géométrie de l'image
[Termes IGN] incertitude géométrique
[Termes IGN] modèle géométrique de prise de vue
[Termes IGN] texturageRésumé : (auteur) Projective texturing is a commonly used image based rendering technique that enables the synthesis of novel views from the blended reprojection of nearby views on a coarse geometry proxy approximating the scene. When scene geometry is inexact, aliasing artefacts occur. This introduces disturbing artefacts in applications such as street-level immersive navigation in mobile mapping imagery, since a pixel-accurate modelling of the scene geometry and all its details is most of the time out of question. The filtered blending approach applies the necessary 1D low-pass filtering on the projective texture to trade out the aliasing artefacts at the cost of some radial blurring. This paper proposes extensions of the filtered blending approach. Firstly, we introduce Integral Radial Images that enable constant time radial box filtering and show how they can be used to apply box-filtered blending in constant time independently of the amount of depth uncertainty. Secondly, we show a very efficient application of filtered blending where the scene geometry is only given by a loose depth interval prior rather than an actual geometry proxy. Thirdly, we propose a silhouette-aware extension of the box-filtered blending that not only account for uncertain depth along the viewing ray but also for uncertain silhouettes that have to be blurred as well Numéro de notice : C2016-063 Affiliation des auteurs : LASTIG MATIS (2012-2019) Thématique : IMAGERIE/INFORMATIQUE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésNat DOI : sans En ligne : https://hal.science/hal-02551490 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=96340
Titre : Single-image interactive 3D generalized cylinder modeling Type de document : Article/Communication Auteurs : Murat Yirci, Auteur ; Mathieu Brédif , Auteur ; Nicolas Paparoditis , Auteur Editeur : Saint-Mandé : Institut national de l'information géographique et forestière - IGN (2012-) Année de publication : 2016 Projets : 1-Pas de projet / Brédif, Mathieu Conférence : JFIG 2016, 29èmes Journées Française d’Informatique Graphique de l'AFIG, du GdR IG-RV du CNRS et du Chapitre Français d’EG 30/11/2016 02/12/2016 Grenoble France Importance : 4 p. Format : 21 x 30 cm Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image
[Termes IGN] filtrage numérique d'image
[Termes IGN] incertitude géométrique
[Termes IGN] modèle géométrique de prise de vue
[Termes IGN] profondeurRésumé : (auteur) Projective texturing is a commonly used image based rendering technique that enables the synthesis of novel views from the blended reprojection of nearby views on a coarse geometry proxy approximating the scene. When scene geometry is inexact, aliasing artefacts occur. This introduces disturbing artefacts in applications such as street-level immersive navigation in mobile mapping imagery, since a pixel-accurate modelling of the scene geometry and all its details is most of the time out of question. The filtered blending approach applies the necessary 1D low-pass filtering on the projective texture to trade out the aliasing artefacts at the cost of some radial blurring. This paper proposes extensions of the filtered blending approach. Firstly, we introduce Integral Radial Images that enable constant time radial box filtering and show how they can be used to apply box-filtered blending in constant time independently of the amount of depth uncertainty. Secondly, we show a very efficient application of filtered blending where the scene geometry is only given by a loose depth interval prior rather than an actual geometry proxy. Thirdly, we propose a silhouette-aware extension of the box-filtered blending that not only account for uncertain depth along the viewing ray but also for uncertain silhouettes that have to be blurred as well. Numéro de notice : C2016-062 Affiliation des auteurs : LASTIG MATIS (2012-2019) Thématique : IMAGERIE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésNat DOI : sans En ligne : https://hal.science/hal-02551493 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=96339 Geometric accuracy analysis model of the ZiYuan-3 satellite without GCPs / Xinming Tang in Photogrammetric Engineering & Remote Sensing, PERS, vol 81 n° 12 (December 2015)
[article]
Titre : Geometric accuracy analysis model of the ZiYuan-3 satellite without GCPs Type de document : Article/Communication Auteurs : Xinming Tang, Auteur ; Ping Zhou, Auteur ; Guo Zhang, Auteur ; et al., Auteur Année de publication : 2015 Article en page(s) : pp 927 - 934 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s)
[Termes IGN] estimation des paramètres
[Termes IGN] évaluation des données
[Termes IGN] évaluation des paramètres
[Termes IGN] image ZiYuan-3
[Termes IGN] modèle géométrique de prise de vue
[Termes IGN] précision géométrique (imagerie)
[Termes IGN] propagation d'erreur
[Termes IGN] source d'erreurRésumé : (auteur) The ZiYuan-3 satellite (ZY-3) was China’s first civilian stereo mapping satellite designed to meet the 1:50 000 scale mapping requirements. We analyzed main error sources influencing the geometric accuracy of the ZY-3 images, and the error propagation rules of these error sources in image production. Accuracy estimation models of ZY-3 images without ground control points (GCPs) were deduced and the theoretical geometric accuracy of ZY-3 images was obtained. Without GCPs, 556 ZY-3 panchromatic nadir images covering 3,500,000 km2 of the Chinese mid-west region and 12 ZY-3 stereo image pairs covering 14,000 km2 around Taiyuan of China were used for planar and vertical accuracy verification, respectively. The experimental results confirmed the correctness of the accuracy estimation model for ZY-3 images. The accuracy results obtained through the model and experiment showed that without GCPs, the geometric accuracy of the ZY-3 images satisfied the Chinese stereo mapping requirements for 1:50 000 scale topographic maps Numéro de notice : A2015-992 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.81.12.927 En ligne : https://doi.org/10.14358/PERS.81.12.927 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80273
in Photogrammetric Engineering & Remote Sensing, PERS > vol 81 n° 12 (December 2015) . - pp 927 - 934[article]The use of video-tacheometric technology for documenting and analysing geometric features of objects / Marek Woźniak in Reports on geodesy and geoinformatics, vol 99 (December 2015)
[article]
Titre : The use of video-tacheometric technology for documenting and analysing geometric features of objects Type de document : Article/Communication Auteurs : Marek Woźniak, Auteur ; Ewa Świerczyńska, Auteur ; Sławomir Jastrzębski, Auteur Année de publication : 2015 Article en page(s) : pp 28 - 43 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Topographie moderne
[Termes IGN] acquisition de données
[Termes IGN] instrument de topométrie
[Termes IGN] orientation interne
[Termes IGN] semis de points
[Termes IGN] tachéomètre électronique
[Termes IGN] vidéotachéomètreRésumé : (auteur) This paper analyzes selected aspects of the use of video-tacheometric technology for inventorying and documenting geometric features of objects. Data was collected with the use of the video-tacheometer Topcon Image Station IS-3 and the professional camera Canon EOS 5D Mark II. During the field work and the development of data the following experiments have been performed: multiple determination of the camera interior orientation parameters and distortion parameters of five lenses with different focal lengths, reflectorless measurements of profiles for the elevation and inventory of decorative surface wall of the building of Warsaw Ballet School. During the research the process of acquiring and integrating video-tacheometric data was analysed as well as the process of combining “point cloud” acquired by using video-tacheometer in the scanning process with independent photographs taken by a digital camera. On the basis of tests performed, utility of the use of video-tacheometric technology in geodetic surveys of geometrical features of buildings has been established. Numéro de notice : A2015--022 Affiliation des auteurs : non IGN Thématique : IMAGERIE/POSITIONNEMENT Nature : Article DOI : 10.2478/rgg-2015-0010 En ligne : https://doi.org/10.2478/rgg-2015-0010 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80846
in Reports on geodesy and geoinformatics > vol 99 (December 2015) . - pp 28 - 43[article]Automatic orthorectification of high-resolution optical satellite images using vector roads / Aleš Marsetič in IEEE Transactions on geoscience and remote sensing, vol 53 n° 11 (November 2015)
[article]
Titre : Automatic orthorectification of high-resolution optical satellite images using vector roads Type de document : Article/Communication Auteurs : Aleš Marsetič, Auteur ; Krištof Oštir, Auteur ; Mojca Kosmatin-Fras, Auteur Année de publication : 2015 Article en page(s) : pp 6035 - 6047 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] capteur en peigne
[Termes IGN] chaîne de traitement
[Termes IGN] colinéarité
[Termes IGN] élément d'orientation externe
[Termes IGN] estimation de position
[Termes IGN] extraction de données
[Termes IGN] géoréférencement
[Termes IGN] image RapidEye
[Termes IGN] modélisation géométrique de prise de vue
[Termes IGN] orthorectification automatique
[Termes IGN] système de coordonnéesRésumé : (Auteur) This paper presents a completely automatic processing chain for orthorectification of optical pushbroom sensors. The procedure is robust and works without manual intervention from raw satellite image to orthoimage. It is modularly divided in four main steps: metadata extraction, automatic ground control point (GCP) extraction, geometric modeling, and orthorectification. The GCP extraction step uses georeferenced vector roads as a reference and produces a file with a list of points and their accuracy estimation. The physical geometric model is based on collinearity equations and works with sensor-corrected (level 1) optical satellite images. It models the sensor position and attitude with second-order piecewise polynomials depending on the acquisition time. The exterior orientation parameters are estimated in a least squares adjustment, employing random sample consensus and robust estimation algorithms for the removal of erroneous points and fine-tuning of the results. The images are finally orthorectified using a digital elevation model and positioned in a national coordinate system. The usability of the method is presented by testing three RapidEye images of regions with different terrain configurations. Several tests were carried out to verify the efficiency of the procedure and to make it more robust. Using the geometric model, subpixel accuracy on independent check points was achieved, and positional accuracy of orthoimages was around one pixel. The proposed procedure is general and can be easily adapted to various sensors. Numéro de notice : A2015-772 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2015.2431434 Date de publication en ligne : 01/06/2015 En ligne : https://doi.org/10.1109/TGRS.2015.2431434 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=78828
in IEEE Transactions on geoscience and remote sensing > vol 53 n° 11 (November 2015) . - pp 6035 - 6047[article]Réservation
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