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The practical application of 3D vision in the field: Measuring reindeer (rangifer tarandus) antler growth velocities / Derek D. Lichti in Photogrammetric record, vol 31 n° 156 (December 2016 - February 2017)  

Public [article]  inPhotogrammetric record > vol 31 n° 156 (December 2016 - February 2017) . - pp 394 - 406 Titre : The practical application of 3D vision in the field: Measuring reindeer (rangifer tarandus) antler growth velocities Type de document : Article/Communication Auteurs : Derek D. Lichti, Auteur ; Jeremy Steward, Auteur ; Jacky C. K. Chow, Auteur ; John Matyas, Auteur Année de publication : 2016 Article en page(s) : pp 394 - 406 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Acquisition d'image(s) et de donnée(s) [Termes IGN] analyse diachronique [Termes IGN] caméra 3D temps-de-vol [Termes IGN] image 3D [Termes IGN] image optique [Termes IGN] semis de points Résumé : (auteur) Advances in three-dimensional (3D) optical imaging have made possible precise and accurate measurements of many scenes, ranging from engineering to architecture to art. However, measurements of some 3D objects are more difficult to obtain than others, particularly if the edges do not feature regular geometry, the colour is dark and variable, and if the object moves haphazardly. Such objects occur regularly in biology, and the present study illustrates some of the challenges of evaluating such objects. The growing antlers of three live reindeer (Rangifer tarandus) is presented as an example of how 3D imaging, specifically time-of-flight range imaging, can be used to solve to a reasonable extent a problem that is very difficult to approximate using traditional techniques. Mean antler growth velocities of the order of 7 to 9 mm/day were estimated, using the proposed methodology, from data of these three animals collected over a seven-week period. Numéro de notice : A2016--003 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/phor.12167 Date de publication en ligne : 07/11/2016 En ligne : https://doi.org/10.1111/phor.12167 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83821 [article]

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
106-2016041	RAB	Revue	Centre de documentation	En réserve L003	Disponible

Inner constraints for planar features / Derek D. Lichti in Photogrammetric record, vol 28 n° 141 (March - May 2013)  

Public [article]  inPhotogrammetric record > vol 28 n° 141 (March - May 2013) . - pp 74 - 85 Titre : Inner constraints for planar features Type de document : Article/Communication Auteurs : Derek D. Lichti, Auteur ; Jacky C. K. Chow, Auteur Année de publication : 2013 Article en page(s) : pp 74 - 85 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Lasergrammétrie [Termes IGN] auto-étalonnage [Termes IGN] compensation par moindres carrés [Termes IGN] contrainte géométrique [Termes IGN] plan (géométrie) [Termes IGN] télémétrie laser terrestre Résumé : (Auteur) Geometric features, planes in particular, have recently replaced signalised points as the object space primitives of choice for a number of fundamental terrestrial laser scanner data processing tasks such as registration, self-calibration and deformation monitoring. The inner constraints for planes are developed in this paper owing to their importance as the optimal means of datum definition. Pertinent least squares adjustment results from several terrestrial laser scanner datasets are presented to demonstrate the impact of planar inner constraints on registration and self-calibration. When solution quality is measured in terms of parameter precision and correlation, it is demonstrated that the planes should be constrained for both laser scanner registration and self-calibration with a basic additional parameter set. Numéro de notice : A2013-152 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : 10.1111/j.1477-9730.2012.00700.x Date de publication en ligne : 16/12/2012 En ligne : https://doi.org/10.1111/j.1477-9730.2012.00700.x Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32290 [article]

Exemplaires(1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
106-2013011	RAB	Revue	Centre de documentation	En réserve L003	Disponible