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Dense stereo matching strategy for oblique images that considers the plane directions in urban areas / Jianchen Liu in IEEE Transactions on geoscience and remote sensing, vol 58 n° 7 (July 2020)
[article]
Titre : Dense stereo matching strategy for oblique images that considers the plane directions in urban areas Type de document : Article/Communication Auteurs : Jianchen Liu, Auteur ; Linjing Zhang, Auteur ; Zhen Wang, Auteur ; et al., Auteur Année de publication : 2020 Article en page(s) : pp 5109 - 5116 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] appariement automatique
[Termes IGN] appariement d'images
[Termes IGN] appariement dense
[Termes IGN] appariement semi-global
[Termes IGN] bati
[Termes IGN] carte de profondeur
[Termes IGN] corrélation épipolaire dense
[Termes IGN] distorsion d'image
[Termes IGN] erreur moyenne quadratique
[Termes IGN] image oblique
[Termes IGN] perspective
[Termes IGN] planéité
[Termes IGN] zone urbaineRésumé : (auteur) The perspective distortion of oblique images has a substantial impact on dense matching, i.e., it reduces the matching precision. In this article, a strategy of dense matching in which the object plane direction is considered is proposed. According to many regular planes in urban areas, epipolar rectification with minimum distortions relative to the selected reference planes can be generated. The matching results of epipolar images relative to various reference planes are weighted and fused into a single depth map, which is a better matching result. The experimental results demonstrate that the perspective distortion has a substantial influence on the dense matching performance. The root-mean-square error (RMSE) of the flatness for horizontal objects is increased by approximately 30%, and the RMSE of the flatness for façades is increased by approximately 40%. Hence, the proposed matching strategy, in which the object plane is considered, can effectively improve the matching results. Numéro de notice : A2020-394 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2020.2972312 Date de publication en ligne : 20/02/2020 En ligne : https://doi.org/10.1109/TGRS.2020.2972312 Format de la ressource électronique : url article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=95390
in IEEE Transactions on geoscience and remote sensing > vol 58 n° 7 (July 2020) . - pp 5109 - 5116[article]
Titre : More surface detail with one-two-pixel matching Type de document : Rapport Auteurs : Ewelina Rupnik , Auteur ; Marc Pierrot-Deseilligny , Auteur Editeur : Saint-Mandé : Institut national de l'information géographique et forestière - IGN (2012-) Année de publication : 2019 Importance : 16 p. Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] appariement d'histogramme
[Termes IGN] appariement de points
[Termes IGN] appariement semi-global
[Termes IGN] corrélation croisée normalisée
[Termes IGN] corrélation par régions de niveaux de gris
[Termes IGN] géosciences
[Termes IGN] image captée par drone
[Termes IGN] image Pléiades
[Termes IGN] image SPOT 7
[Termes IGN] image terrestre
[Termes IGN] MicMac
[Termes IGN] modèle numérique de surfaceRésumé : (Auteur) Photogrammetrically derived Digital Surface Models have been widely adopted in geoscientific applications such as mapping and change detection across volcanic surfaces, glaciers, areas of seismic activity, forests, river landforms etc. Resolution of the reconstructed surface is crucial as more accurate information enables more profound understanding of the phenomena. With this objective in mind, the research presented here proposes a new matching cost function that produces surfaces of enhanced resolution with respect to the gold standard: the window-based semi-global matching technique. We evaluate the algorithm on different image datasets spanning various acquisition geometries, radiometric qualities and ground sample distance sizes. In particular , results on Earth satellites (SPOT-7, Pléiades), extraterres-trial (Chang'E3 moon landing), aerial and terrestrial acquisitions are shown. The implementation of the method is available in MicMac-the free open-source software for photogrammetry. I. INTRODUCTION Digital surface model (DSM or photogrammetric DSM) generation using dense image matching is an accepted technique across the geoscience communities. Next to other competitive techniques such as LiDAR or radar, image-based reconstruction produces denser 3D information, it is cost-effective and richer as it includes photometric observations that allow, for example, 3D change detection or classification. Photogrammetric DSMs in geoscience applications can be generated from terrestrial images, unmanned aerial vehicle (UAV) acquisitions or high-resolution optical satellite imaging. a) Terrestrial and UAV applications: Modelling of surface roughness parameters [1]; mapping volcanic surfaces [2]; and measuring glaciers' microrelief progression [3] are some of many examples of terrestrial applications carried out with consumer grade cameras and little expert knowledge. UAV-based surveys are increasingly presented as an alternative to terrestrial surveys due to their larger reach, their ease of deployment and reduced operational cost. With respect to resolution, UAV surveys are a compromise between high-resolution close-range and moderate-resolution satellite imaging. The success of the UAV technology is reflected in numerous publications which show that UAV-collected imagery can: enable modelling of forest canopy height [4]; determine the rate and extent of landslide movements [5]; quantify coastal erosion [6], [7] and deposition processes [8] in aeolian research; map ultrafine (i.e. centimetric) tectonic faults in tectonic research [9]; or be employed in repeated surveys of the ice-sheet masses in glaciology [10]. b) Earth satellite and extraterrestrial applications: With the available optical satellite data provided by modern (e.g. Pléiades 1A/B, SPOT-satellites, QuickBird, WorldView 2/3/4, CubeSat) or older satellites (e.g. CartoSat, ASTER), we can Numéro de notice : 26221 Affiliation des auteurs : LASTIG MATIS (2012-2019) Thématique : IMAGERIE Nature : Rapport de recherche nature-HAL : RappRech DOI : sans En ligne : https://hal.archives-ouvertes.fr/hal-02371337 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=94223 Documents numériques
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More surface detail with One-Two-Pixel Matching - pdf Archives ouvertes HALAdobe Acrobat PDF SGM-based seamline determination for urban orthophoto mosaicking / Shiyan Pang in ISPRS Journal of photogrammetry and remote sensing, vol 112 (February 2016)
[article]
Titre : SGM-based seamline determination for urban orthophoto mosaicking Type de document : Article/Communication Auteurs : Shiyan Pang, Auteur ; Mingwei Sun, Auteur ; Xiangyun Hu, Auteur ; Zuxun Zhang, Auteur Année de publication : 2016 Article en page(s) : pp 1 – 12 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] appariement semi-global
[Termes IGN] classification pixellaire
[Termes IGN] géométrie épipolaire
[Termes IGN] mosaïquage d'images
[Termes IGN] orthoimage
[Termes IGN] orthophotocarte
[Termes IGN] raccord d'images
[Termes IGN] seuillage d'image
[Termes IGN] zone urbaineRésumé : (auteur) Mosaicking is a key step in the production of digital orthophoto maps (DOMs), especially for large-scale urban orthophotos. During this step, manual intervention is commonly involved to avoid the case where the seamline crosses obvious objects (e.g., buildings), which causes geometric discontinuities on the DOMs. How to guide the seamline to avoid crossing obvious objects has become a popular topic in the field of photogrammetry and remote sensing. Thus, a new semi-global matching (SGM)-based method to guide seamline determination is proposed for urban orthophoto mosaicking in this study, which can greatly eliminate geometric discontinuities. The approximate epipolar geometry of the orthophoto pairs is first derived and proven, and the approximate epipolar image pair is then generated by rotating the two orthorectified images according to the parallax direction. A SGM algorithm is applied to their overlaps to obtain the corresponding pixel-wise disparity. According to a predefined disparity threshold, the overlap area is identified as the obstacle and non-obstacle areas. For the non-obstacle regions, Hilditch thinning algorithm is used to obtain the skeleton line, followed by Dijkstra’s algorithm to search for the optimal path on the skeleton network as the seamline between two orthophotos. A whole seamline network is constructed based on the strip information recorded in flight. In the experimental section, the approximate epipolar geometric theory of the orthophoto is first analyzed and verified, and the effectiveness of the proposed method is then validated by comparing its results with the results of the geometry-based, OrthoVista, and orthoimage elevation synchronous model (OESM)-based methods. Numéro de notice : A2016-135 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.isprsjprs.2015.11.007 En ligne : https://doi.org/10.1016/j.isprsjprs.2015.11.007 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=80304
in ISPRS Journal of photogrammetry and remote sensing > vol 112 (February 2016) . - pp 1 – 12[article]Comparison of matching algorithms for DSM generation in urban areas from ikonos imagery / A. Alobeid in Photogrammetric Engineering & Remote Sensing, PERS, vol 76 n° 9 (September 2010)
[article]
Titre : Comparison of matching algorithms for DSM generation in urban areas from ikonos imagery Type de document : Article/Communication Auteurs : A. Alobeid, Auteur ; Karsten Jacobsen, Auteur ; Christian Heipke, Auteur Année de publication : 2010 Article en page(s) : pp 1041 - 1050 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] analyse comparative
[Termes IGN] appariement automatique
[Termes IGN] appariement semi-global
[Termes IGN] détection du bâti
[Termes IGN] image à résolution métrique
[Termes IGN] image Ikonos
[Termes IGN] image optique
[Termes IGN] méthode des moindres carrés
[Termes IGN] milieu urbain
[Termes IGN] modèle numérique de surface
[Termes IGN] programmation dynamiqueRésumé : (Auteur) The extraction of the third dimension from remote sensing data is a well known technique. Since in a number of countries aerial images and laser scanner data are unavailable, expensive or classified, stereoscopic high-resolution optical satellite images provide a viable alternative for generating digital surface and digital terrain models. Especially the automatic extraction of highly accurate 3D surface models in urban areas is still a very complicated task due to occlusions, large differences in height and the variety of objects and surface material. In this paper, an analysis and a visual and quantitative comparison of three different matching algorithms for generating urban DSMs based on very high-resolution satellite images is presented. The three algorithms are least squares matching (lsm) in a region growing fashion, dynamic programming (DP) and semiglobal matching (sgm). The characteristics of the three algorithms as applied to four different Ikonos stereo pairs with a ground sampling distance of 1 m are shown. The following results were obtained: visually, in the lsm results the shape of the buildings is considerably smoothed. While in the DP results the building shape is sharper, only little detail is visible on the building roofs, and streaking along the epipolar lines causes problems. With SGM, more details can be extracted and the results visually have the best quality. Based on reference data for the different test sites, the standard deviation of the building heights determined by LSM and DP is in the range of one pixel or slightly better, while it is in the range of half a pixel for SGM. Numéro de notice : A2010-366 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.76.9.1041 En ligne : https://doi.org/10.14358/PERS.76.9.1041 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=30560
in Photogrammetric Engineering & Remote Sensing, PERS > vol 76 n° 9 (September 2010) . - pp 1041 - 1050[article]