Centre de documentation
scientifique

Synergetic fusion of GPS and photogrammetrically generated elevation models / Jon P. Mills in Photogrammetric Engineering & Remote Sensing, PERS, vol 69 n° 4 (April 2003)  

Public [article]  inPhotogrammetric Engineering & Remote Sensing, PERS > vol 69 n° 4 (April 2003) . - pp 341 - 349 Titre : Synergetic fusion of GPS and photogrammetrically generated elevation models Type de document : Article/Communication Auteurs : Jon P. Mills, Auteur ; S.J. Buckley, Auteur ; H.L. Mitchell, Auteur Année de publication : 2003 Article en page(s) : pp 341 - 349 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] appariement géométrique [Termes IGN] coût [Termes IGN] données GPS [Termes IGN] erreur systématique [Termes IGN] fusion de données [Termes IGN] GPS en mode cinématique [Termes IGN] image numérique [Termes IGN] méthode des moindres carrés [Termes IGN] modèle numérique de surface [Termes IGN] orientation relative [Termes IGN] photographie aérienne [Termes IGN] point d'appui [Termes IGN] restitution Résumé : (Auteur) Digital elevation models (DEMs) produced from photogrammetric data sources have long relied on the use of ground control points to give them scale and orientation. However, in areas such as coastlines, landslides, or glaciers, where identification of suitable natural features and premarking is difficult, the use of conventional ground control may be unfeasible. This paper reports on research that uses independently collected DEMs derived from kinematic GPS to orient surfaces produced by aerial photogrammetric methods, using a leastsquares surface matching algorithm. During algorithm development, three stages of testing were carried out, Using increasingly more complex datasets. Initially, simulated surfaces were used to validate the matching theory and program. Then, a DEM derived from conventional aerial photography was matched with a GPS model, highlighting the effectiveness of surface matching to recover systematic errors in datosets. Finally, surfaces derived from small format digital imagery were successfully fused with wireframe GPS surfaces, the high redundancy and automation potential creating an elegant and cheaper alternative to photocontrol. Numéro de notice : A2003-109 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.14358/PERS.69.4.341 En ligne : https://doi.org/10.14358/PERS.69.4.341 Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=22405 [article]

Improving area-based matching by using surface gradients in the pixel co-ordinate transformation / M. Mustaffar in ISPRS Journal of photogrammetry and remote sensing, vol 56 n° 1 (May - June 2001)  

Public [article]  inISPRS Journal of photogrammetry and remote sensing > vol 56 n° 1 (May - June 2001) . - pp 42 - 52 Titre : Improving area-based matching by using surface gradients in the pixel co-ordinate transformation Type de document : Article/Communication Auteurs : M. Mustaffar, Auteur ; H.L. Mitchell, Auteur Année de publication : 2001 Article en page(s) : pp 42 - 52 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie numérique [Termes IGN] appariement de formes [Termes IGN] géométrie affine [Termes IGN] méthode des moindres carrés [Termes IGN] modèle géométrique [Termes IGN] photogrammétrie métrologique Résumé : (Auteur) Area-based least squares matching has existed since the 1980s, and its development may therefore be regarded by some photogrammetrists as complete. However, this is a relatively short time in a rapidly changing discipline, and the method does have scope for further refinement. This paper aims to enhance the fidelity of the fundamental mathematical model, which relates pixel positions in area-based matching. If successful, its benefit is seen to lie within close-range photogrammetry, in which object undulations, convergent camera directions and large image scales can introduce significant levels of perspective distortion. It is hypothesised that a model, which takes into account the surface shape within the match window, would provide a pixel position relationship which is applicable across larger windows than those which are applicable with the conventional matching model, based on an affine transformation. The use of larger windows for the image matching increases the redundancy. Revised co-ordinate transformations, based on mathematical surface models across the windows, are proposed in this paper. When tested on the measurement of real objects, even simple surface models are found to increase the complexity of the matching mathematics, but when compared with the traditional affine transformation solution using three test objects, precision improved noticeably. Generally, accuracy also improved, but the improvements were not as distinct as they were for precision. Quicker convergence with fewer iterations was usually obtained, and this is seen as particularly indicative of a more faithful model. Yet more rigorous surface modelling may be worth developing, but the means of choosing the most appropriate models for different objects also remains a question deserving to be pursued. Copyright ISPRS Numéro de notice : A2001-219 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/S0924-2716(01)00034-X En ligne : https://doi.org/10.1016/S0924-2716(01)00034-X Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=21913 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
081-01021	SL	Revue	Centre de documentation	Revues en salle	Disponible

GPS / H.L. Mitchell (1990)

Public Titre : GPS : heighting and the AHD [Australian Height Datum] Type de document : Monographie Auteurs : H.L. Mitchell, Auteur ; A.H.W. Kearsley, Auteur ; J.R. Gilliland, Auteur ; V. Argeseanu, Auteur ; R.D. Holloway, Auteur ; P.J. Morgan, Auteur Editeur : Kensington [Australie] : University of New South Wales Année de publication : 1990 Importance : 77 p. Format : 21 x 30 cm Langues : Anglais (eng) Descripteur : [Termes IGN] Australian Height Datum [Termes IGN] Australie [Termes IGN] ellipsoïde (géodésie) [Termes IGN] hauteur ellipsoïdale [Termes IGN] niveau moyen des mers [Termes IGN] nivellement par GPS [Termes IGN] positionnement par GPS [Termes IGN] système de référence altimétrique [Vedettes matières IGN] Altimétrie Index. décimale : 30.50 Nivellement - généralités Numéro de notice : 18417 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=55388

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
18417-01	30.50	Livre	Centre de documentation	Géodésie	Disponible

Stereomicroscope photogrammetry for the measurement of small objects / H.L. Mitchell in Photogrammetric record, vol 13 n° 74 (October 1989 - March 1990)  

Public [article]  inPhotogrammetric record > vol 13 n° 74 (October 1989 - March 1990) . - pp 289 - 299 Titre : Stereomicroscope photogrammetry for the measurement of small objects Type de document : Article/Communication Auteurs : H.L. Mitchell, Auteur ; R.G. Chadwick, Auteur ; J.F. Mccabe, Auteur Année de publication : 1989 Article en page(s) : pp 289 - 299 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Photogrammétrie terrestre [Termes IGN] instrumentation Zeiss [Termes IGN] microscopie [Termes IGN] photogrammétrie médicale [Termes IGN] photogrammétrie métrologique [Termes IGN] stéréocomparateur [Termes IGN] stéréoscopie Numéro de notice : A1989-307 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/j.1477-9730.1989.tb00680.x En ligne : https://doi.org/10.1111/j.1477-9730.1989.tb00680.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=25266 [article]

Exemplaires(2)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
106-89021	RAB	Revue	Centre de documentation	En réserve L003	Disponible
106-89022	RAB	Revue	Centre de documentation	En réserve L003	Disponible