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A radiometric aerial triangulation for the equalization of digital aerial Images and orthoimages / Laure Chandelier in Photogrammetric Engineering & Remote Sensing, PERS, vol 75 n° 2 (February 2009)
[article]
Titre : A radiometric aerial triangulation for the equalization of digital aerial Images and orthoimages Type de document : Article/Communication Auteurs : Laure Chandelier , Auteur ; Gilles Martinoty , Auteur Année de publication : 2009 Article en page(s) : pp 193 - 200 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique
[Termes IGN] image aérienne
[Termes IGN] méthode des moindres carrés
[Termes IGN] modélisation radiométrique de prise de vue
[Termes IGN] orthoimage
[Termes IGN] point d'appui
[Termes IGN] points homologues
[Termes IGN] qualité radiométrique (image)
[Termes IGN] uniformisation d'histogrammeRésumé : (Auteur) Atmospheric haze variations, temporal differences, atmosphere’s or ground surfaces’ and Bidirectional Reflectance Distribution Function (BRDF), are well-known sources of radiometric heterogeneities in aerial images. It is necessary to correct them for many applications, such as the generation of large seamless mosaics of orthoimages, or land-cover classifications. This contribution describes a method for equalizing digital aerial images based on a parametric, semi-empirical radiometric model. The model’s parameters are computed through a global least-squares minimization process, using radiometric tie-points in overlapping areas between images. The method may be called a “radiometric aerial triangulation” since its principle is quite similar to a standard aerial triangulation. It leads to a relative equalization between images, keeping their original contrast and color information. The method has been successfully applied operationally to more than forty projects comprising three to four thousands digital images each, for the creation of orthoimages over France. The results are good as long as atmospheric conditions are favorable and stable. Copyright ASPRS Numéro de notice : A2009-013 Affiliation des auteurs : IGN (1940-2011) Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.75.2.193 En ligne : https://doi.org/10.14358/PERS.75.2.193 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=29643
in Photogrammetric Engineering & Remote Sensing, PERS > vol 75 n° 2 (February 2009) . - pp 193 - 200[article]
Titre : Classification of roof materials for rainwater pollution modelization Type de document : Article/Communication Auteurs : Arnaud Le Bris , Auteur ; Pauline Robert-Sainte, Auteur Editeur : International Society for Photogrammetry and Remote Sensing ISPRS Année de publication : 2009 Conférence : ISPRS 2009, High-Resolution Earth Imaging for Geospatial Information workshop 02/06/2009 05/06/2009 Hanovre Allemagne OA ISPRS Archives Importance : 6 p. Format : 21 x 30 cm Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image optique
[Termes IGN] BD Topo
[Termes IGN] classification dirigée
[Termes IGN] eau pluviale
[Termes IGN] image RVB
[Termes IGN] matériau
[Termes IGN] milieu urbain
[Termes IGN] ombre
[Termes IGN] orthoimage couleur
[Termes IGN] pollution des eaux
[Termes IGN] segmentation d'image
[Termes IGN] toitRésumé : (Auteur) It has been proven that roof runoff water plays an important role in the high metallic concentration levels in urban rainwater since metallic elements are generated by corrosion of roof materials before being swept away by rainwater. The aim of TOITEAU project is therefore to model this phenomenon, evaluating the metallic flows from roofs in rainwater. To achieve this goal, an important work has already been done to model those flows at roof scale. But, it has now to be extrapolated to a whole drainage area, requiring knowledge about the areas concerned by the different kinds of roof coverage, that is to say that a map of roof materials is needed. Such information can be extracted from aerial (ortho) images owing to (supervised) classification techniques. In the present situation, only six classes corresponding to the following kinds of roofs were defined : zinc plates, slates, red tiles, brown tiles and flat roofs. Nevertheless, classification results are limited because of several factors that have therefore to be dealt with. First of all, some distinct classes have very similar radiometric distribution (such as for instance zinc and at light slates), making it hard to distinguish between them. That's why derived channels computed from initial red-green-blue channels of the ortho-image have been used to improve the classification results. Texture channels have also been tested especially to discriminate zinc from other light coloured roof materials. For the same reason and in order not to obtain a too ”noisy” result, per region classification algorithms have been used : homogeneous regions will be classified instead of pixels. Secondly, roofs are the only interesting parts of the ortho-image in this study. As a consequence, a building mask is first computed from digital topographic database BDTopo in order to classify only roofs. However, several elements concerning data precision have to be taken into account at this step. For instance, the ortho-image and the topographic database can obviously not have been captured at the same date and, as a consequence, buildings can have been destroyed, modified or built between these two distinct capture times. In addition, as the used ortho-image is not a ”true ortho-image”, building objects from digital topographic database and ortho-image roofs are not perfectly superposed. However, these topographic database building objects can be registered to the ortho-image. Nevertheless, it must be said that these database objects often remain caricatures of true buildings. Besides, most of the time, homogeneous regions to be classified do not directly correspond to database buildings since those database objects can be groups of buildings or buildings of which the roof is composed of different materials. Therefore, it is necessary to segment building areas (according to the topographic database) of the ortho-image into homogeneous regions that are then classified. Lastly, shadows can be quite important in roof areas because of the presence of roof superstructures or higher buildings in the neighbourhood. That's why an additional class ”shadow” is also defined in order to take into account shadow areas where radiometric information is not sufficient to discriminate between the different kinds of materials. Tests have been carried out on two distinct study areas with 50cm resolution orthophotos for the first one and 12cm resolution orthoimages for the second one. The first study area was a dense urban centre, whereas the second could be divided into several parts : a residential suburb consisting of houses, a dense urban centre with buildings having up to 4-5 levels and a mixed residential / service area consisting of higher buildings. Numéro de notice : C2009-038 Affiliation des auteurs : MATIS+Ext (1993-2011) Thématique : IMAGERIE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : sans En ligne : https://www.isprs.org/proceedings/XXXVIII/1_4_7-W5/paper/LE_BRIS-152.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=64298 Documents numériques
en open access
Classification of roof materials ... - pdf éditeurAdobe Acrobat PDF Digital photogrammetry / W. Linder (2009)
Titre : Digital photogrammetry : a practical course Type de document : Guide/Manuel Auteurs : W. Linder, Auteur Mention d'édition : 3 Editeur : Berlin, Heidelberg, Vienne, New York, ... : Springer Année de publication : 2009 Importance : 220 p. Format : 16 x 24 cm + 1 paire de lunettes + 1 cederom ISBN/ISSN/EAN : 978-3-540-92724-2 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique
[Termes IGN] aérotriangulation
[Termes IGN] compensation par bloc
[Termes IGN] limite de résolution géométrique
[Termes IGN] limite de résolution radiométrique
[Termes IGN] modèle numérique de terrain
[Termes IGN] mosaïque d'images
[Termes IGN] orientation interne
[Termes IGN] orthoimage
[Termes IGN] photogrammétrie métrologiqueIndex. décimale : 33.30 Photogrammétrie numérique Résumé : (Editeur) The third edition is an "all-in-one" combination of basic theory and practical exercises. Potential readers/users are students of Photogrammetry, Geodesy, Geography and other sciences, but also all who are interested in this topic. No prior knowledge is necessary, except the handling of standard PCs. Theory is presented true to the motto "as little as possible, but as much as necessary". The main part of the book contains several tutorials. In increasing complexity, accompanied by texts explaining further theory, the reader can proceed step by step through the particular working parts. All intermediate as well as the final results are discussed with reference to accuracy and error handling. Most of the standard work in Digital Photogrammetry is shown and trained for example scanning, image orientation, mono and stereo plotting, aerial triangulation measurement (manual and automatic), block adjustment, automatic creation of surface models via image matching, creation of ortho images and mosaics, and others. Not only standard situations are dealt with but also more complex ones, such as unknown camera data, extreme relief or areas with very low contrast. Examples of both aerial and close-range photogrammetry present the power of these type of measurement techniques. The software is not limited to the example data included but may be used for personal projects. Part of the book comprises a complete description of the software. Note de contenu : 1 Introduction
1.1 Basic idea and main task of photogrammetry
1.2 Why photogrammetry ?
1.3 Image sources: Analogue and digital cameras
1.4 Digital consumer cameras
1.5 Short history of photogrammetric evaluation methods
1.6 Geometric principles 1: Camera position, focal length
1.7 Geometric principles 2: Image orientation
1.8 Geometric principles 3: Relative camera positions (stereo)
1.9 Some definitions
1.10 Length and angle units
1.11 A typical workflow in photogrammetry
2 Included software and data
2.1 Hardware requirements, operating system
2.2 Image material
2.3 Overview of the software
2.4 Installation
2.5 Additional programmes, copyright, data
2.6 General remarks
2.7 Software versions, support
3 Scanning of photos
3.1 Scanner types
3.2 Geometric resolution
3.3 Radiometric resolution
3.4 Some practical advice
3.5 Import of the scanned images
4 Example 1: A single model
4.1 Project definition
4.2 Orientation of the images
4.3 Model definition
4.4 Stereoscopic viewing
4.5 Measurement of object co-ordinates
4.6 Creation of DTMs via image matching
4.7 Ortho images
5 Example 2: Aerial triangulation
5.1 Aerial triangulation measurement (ATM)
5.2 Block adjustment with BLUH
5.3 Mosaics of DTMs and ortho images
6 Example 3: Some special cases
6.1 Scanning aerial photos with an A4 scanner
6.2 Interior orientation without camera parameters
6.3 Images from a digital camera
6.4 An example of close-range photogrammetry
6.5 Some remarks about lens distortion
6.6 Stereo images from satellites
6.7 Stereo images from flatbed scanners
6.8 A view into the future: Photogrammetry in 2020
7 Programme description
7.1 Some definitions
7.2 Basic functions
7.3 Aims and limits of the programme
7.4 Operating the programme
7.5 Buttons in the graphics windows
7.6 File handling
7.7 Pre programmes
7.8 Aerial triangulation measurement (ATM)
7.9 Processing
7.10 Display
7.11 Aerial triangulation with BLUHNuméro de notice : 20593 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Manuel Accessibilité hors numérique : Non accessible via le SUDOC Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=46832
Titre : GIS-based management and analysis of the geoglyphs in the Palpa region Type de document : Thèse/HDR Auteurs : Martin Sauerbier, Auteur Editeur : Zurich : Institut für Geodäsie und Photogrammetrie IGP - ETH Année de publication : 2009 Collection : IGP Mitteilungen, ISSN 0252-9335 num. 104 Importance : 173 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-906467-85-6 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications SIG
[Termes IGN] analyse spatiale
[Termes IGN] archéologie aérienne
[Termes IGN] données localisées 3D
[Termes IGN] données vectorielles
[Termes IGN] image aérienne
[Termes IGN] image Terra-ASTER
[Termes IGN] modèle numérique de surface
[Termes IGN] orthoimage
[Termes IGN] orthophotographie
[Termes IGN] Pérou
[Termes IGN] photogrammétrie numérique
[Termes IGN] reconstruction 3D
[Termes IGN] site archéologique
[Termes IGN] système d'information géographique
[Termes IGN] télémétrie laser terrestre
[Termes IGN] visualisation 3DRésumé : (Auteur) This dissertation results from the work conducted by the author within the frame of the Nasca-Palpa project at the chair of photogrammetry and remote sensing of ETH Zurich. The work presented here reports on the work conducted at ETH Zurich during the Nasca/Palpa project with the focus on the investigation of the geoglyphs, also known as the Nosca lines, in the Palpa area. This thesis covers basically two main parts: Photogrammetric data acquisition, processing and geoglyph reconstruction for the Palpa region and the Pampa de Nasca and CIS-based management and analysis of the generated data, primarily for the geoglyphs of Palpa. The motivation behind this work was the need for suitable data management and analysis methods demanded by the involved archaeologists to enable a quantitative study of the spatial characteristics of the geoglyphs and the surrounding landscape in order to better understand the social and cultural meaning of the geoglyphs. Aside from the geoglyphs, a second class of figurative remains was investigated: The petroglyphs of Chichictara.
Complementary to the archaeological investigations of our project partners, namely the German Archaeological Institute (DAI-KAAK), Bonn, Germany), the author concentrated on methods for 3D data acquisition for archaeological purposes in large and medium scale with the focus on photogrammetric methods. Furthermore, a second important focus was laid on the design of a GIS database containing archaeological and spatial information and the development of analysis methods with respect to the spatial characteristics of the archaeological objects to be investigated, in this case the geoglyphs in the Nasca region and the petroglyphs of Chichictara in south Peru. The accomplished work resulted in a wide variety of data and derived products and analysis results which led to new insights in the historical function and meaning of the geoglyphs of Nasca. The generated data consists of Digital Terrain Models derived from aerial and satellite imagery, 3D vector data representing the geoglyphs, high resolution orthoimages and numerical results of analyses performed based on the generated spatial data.
The applied and developed methods aim to investigate the geoglyphs in a manner that should be as objective as possible, trying to answer concrete archaeological questions. Though manifold hypotheses on the geoglyphs exist, the aim was not to focus on a single one but given the data available to investigate especially those which imply a spatial character for the subset of geoglyphs of Palpa. The methods applied for data acquisition, object definition and quantitative analysis of the geoglyphs are an important achievement of this thesis and can be applied in future studies on more complete sets of geoglyph data as well as for similar studies in other areas of investigation. Analogue to the development of the GIS database for the geoglyphs, a database for petroglyph data was developed under consideration of the true 3D character of this rock art and its surrounding topography. The developed databases, tools and analysis methods described here represent a system that is suited as a basis for archaeological interpretation of the landscape decorations in the Nasca and Palpa region and provides even an enormous potential for further analyses to be accomplished in the future. At the present state, the database contains data on the geoglyphs of Palpa and of a subset of the petroglyphs at Chichictara. though the developed data structure enables an enhancement with further data on both, Nasca time geoglyphs and Paracas time petroglyphs, from other sites. Having these two valuable databases documenting the two classes of figures that engrave the landscape in such an impressive way, a wide range of possibilities of archaeological interpretation opens up for future work beyond this thesis, as well do the developed tools and methods presented here.
The author thanks the Swiss-Liechtenstein foundation for Archeological Research Abroad (SLSA), the AVINA foundation and ETH Zurich for their valuable support that enabled this thesis.Note de contenu : 1 Introduction
1.1 Research Goals
1.2 The Nasca/Palpa Project at ETH Zurich
1.3 Research Topics
1.4 Photogrammetric Mapping of Large Area CH Sites
1.5 Archaeological GIS
1.5.1 Added Value of Information Systems in Archaeology
1.5.2 Archaeological Requirements
1.5.3 Overview of Applications of GIS in Archaeology
1.5.4 Modeling the Temporal Component in GIS
1.5.5 GIS for Geoglyph Management and Analysis
1.6 Previous work related to the geoglyphs in Nasca and Palpa
1.6.1 Previous Work on Geoglyphs and Related Settlements in Nasca and Palpa
1.7 Rock Art Documentation and Data Management
2 Photogrammetric Processing
2.1 Image Data for 3D Reconstruction of the Pampa de Nasca
2.2 Photogrammetric Methods
2.3 Image Orientation
2.4 DTM Generation
2.5 Orthoimage Generation
2.6 Geoglyph Mapping
2.6.1 Stereoscopic Mapping of the Geoglyphs
2.6.2 Digital Monoplotting
2.6.3 Applicability of Satellite Imagery
2.6.4 Automation Issues on Geoglyph Mapping
2.7 A 3D Model from ASTER Images .
2.8 Image-based Modeling of the Petroglyphs of Chichictara
2.8.1 Terrestrial Laser Scanning for DTM Generation
2.8.2 Photogrammetric 3D Modeling of Petroglyph Rocks
2.8.3 Integration of the Textured 3D Models in the Laser Scan DTM
2.8.4 3D Digitization of the Petroglyphs
3 GIS-based Management of the Archaeological Data
3.1 Requirements of a GIS
3.2 Data Management
3.2.1 Requirements for a GIS for the Geoglyphs
3.2.2 Database Issues
3.2.3 GIS Software Issues '
3.3 Conceptual Data Modeling and Implementation Issues
3.3.1 A Data Model for the Geoglyphs .
3.3.2 A Metadata Model
3.4 A Petroglyph Information System
3.4.1 Requirements
3.4.2 Workflow for Petroglyph Data Management
3.4.3 Software Issues
3.4.4 Implementation of the Petroglyph Information System
4 GIS-based Analyses
4.1 Hypotheses and Verification
4.2 Queries and Statistical Analyses on Attribute Data
4.2.1 Queries Related to Object Definition
4.2.2 Queries for Data Retrieval
4.3 Spatial and Geometric Characteristics of the Geoglyphs
4.3.1 Straightness of Line-shaped Geoglyphs
4.3.2 Geoglyph Visibility
4.3.3 Interdependency of Spatial Variables
4.3.4 Analysis of the Influence of Spatial Variables
4.3.5 Orientations of the Palpa Geoglyphs
4.4 The Petroglyphs of Chichictara in their Natural Context
5 Visualization
5.1 3D Visualization of DTM and Orthomosaic
5.2 Visualization of Semantic and Spatial Analysis Results
5.2.1 Chronological Development of the Palpa Geoglyphs
5.2.2 Typological Differentiation of the Palpa Geoglyphs
5.2.3 3D Visualization of Spatial Analysis Results
6 Conclusions and Future Perspectives
6.1 Photogrammetric Processing
6.2 Trends in Archaeological GIS
6.3 Recent Developments in GIS and DBMS Software and Future Trends
6.4 Results from Geoglyph Analysis
6.5 Future Perspectives Based on the Actual State of the ProjectNuméro de notice : 15507 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Thèse étrangère En ligne : http://dx.doi.org/10.3929/ethz-a-005940066 Format de la ressource électronique : URL Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=62740 Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 15507-01 37.40 Livre Centre de documentation Géomatique Disponible Pathway detection and geometrical description from ALS data in forested mountaneous area / Nicolas David (2009)
contenu dans ISPRS Workshop Laserscanning'09, Paris, France, September 1-2, 2009 / Frédéric Bretar (2009)
Titre : Pathway detection and geometrical description from ALS data in forested mountaneous area Type de document : Article/Communication Auteurs : Nicolas David , Auteur ; Thomas Pons, Auteur ; Adrien Chauve , Auteur ; Frédéric Bretar, Auteur ; Clément Mallet , Auteur Editeur : International Society for Photogrammetry and Remote Sensing ISPRS Année de publication : 2009 Collection : International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences, ISSN 1682-1750 num. 38-3/W8 Conférence : ISPRS 2009, Workshop LaserScanning 01/09/2009 02/09/2009 Paris France OA Archives proceedings Importance : pp 242 - 247 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie
[Termes IGN] données lidar
[Termes IGN] extraction automatique
[Termes IGN] forêt
[Termes IGN] montagne
[Termes IGN] orthoimage
[Termes IGN] semis de points
[Termes IGN] télémétrie laser aéroportéRésumé : (Auteur) In the last decade, airborne laser scanning (ALS) systems have become an alternative source for the acquisition of altimeter data. Compared to high resolution orthoimages, one of the main advantages of ALS is the ability of the laser beam to penetrate vegetation and reach the ground underneath. Therefore, 3D point clouds are essential data for computing Digital Terrain Models (DTM) in natural and vegetated areas. DTMs are a key product for many applications such as tree detection, flood modelling, archeology or road detection. Indeed, in forested areas, traditional image-based algorithms for road and pathway detection would partially fail due to their occlusion by the canopy cover. Thus, crucial information for forest management and fire prevention such as road width and slope would be misevaluated.
This paper deals with road and pathway detection in a complex forested mountaneous area and with their geometrical parameter extraction using lidar data. Firstly, a three-step image-based methodology is proposed to detect road regions. Lidar feature orthoimages are first generated. Then, road seeds are both automatically and semi-automatically detected. And, a region growing algorithm is carried out to retrieve the full pathways from the seeds previously detected. Secondly, these pathways are vectorized using morphological tools, smoothed, and discretized. Finally, ID sections within the lidar point cloud are successively generated for each point of the pathways to estimate more accurately road widths in 3D. We also retrieve a precise location of the pathway borders and centers, exported as vector data.Numéro de notice : C2009-006 Affiliation des auteurs : MATIS+Ext (1993-2011) Thématique : FORET/IMAGERIE Nature : Communication nature-HAL : ComAvecCL&ActesPubliésIntl DOI : sans En ligne : https://www.isprs.org/proceedings/XXXVIII/3-W8/papers/242_laserscanning09.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=65046 Reconstruction de façades de bâtiments par appariement dense d’images terrestres géoréférencées haute résolution / Lionel Pénard (2009)PermalinkAssessing geometric reliability of corrected images from very high resolution satellites / M. Aguilar in Photogrammetric Engineering & Remote Sensing, PERS, vol 74 n° 12 (December 2008)PermalinkExtraction of land cover themes from aerial ortho-images in mountainous areas using external information / Arnaud Le Bris in Photogrammetric record, vol 23 n° 124 (December 2008 - February 2009)PermalinkOrthoimage creation of extremely high buildings / Guoqing Zhou in IEEE Transactions on geoscience and remote sensing, vol 46 n° 12 (December 2008)PermalinkAdvanced studies in strip pair processing of Cartosat-1 data / P.K. Srivastava in Photogrammetric record, vol 23 n° 123 (September - November 2008)PermalinkAutomatically and accurately conflating raster maps with orthoimagery / C.C. Chen in Geoinformatica, vol 12 n° 3 (September - November 2008)PermalinkMicrosoft voit la terre en grand / Vincent Habchi in Géomatique expert, n° 62 (01/05/2008)PermalinkPotential of Cartosat-1 images for topographic mapping / Costas Armenakis in Geomatica, vol 62 n° 1 (March 2008)PermalinkExtracting urban road networks from high-resolution true orthoimage and Lidar / J. Youn in Photogrammetric Engineering & Remote Sensing, PERS, vol 74 n° 2 (February 2008)PermalinkGeometric accuracy assessment of QuickBird basic imagery using different operational approaches / M. Aguilar in Photogrammetric Engineering & Remote Sensing, PERS, vol 73 n° 12 (December 2007)Permalink