Zobrazeno 1 - 10
of 96
pro vyhledávání: '"Gaël Kermarrec"'
This open access book provides insights into the novel Locally Refined B-spline (LR B-spline) surface format, which is suited for representing terrain and seabed data in a compact way. It provides an alternative to the well know raster and triangulat
Autor:
Joep Crompvoets, Haiko Voort
Publikováno v:
Bestuurskunde, 25(1)
Big data belooft veel voor surveillance. Toezicht houden is per definitie informatie-intensief. Het is dan ook niet verwonderlijk dat toezichthouders projecten opstarten om de nieuwe mogelijkheden van big data te exploreren. We spraken Gael Kermarrec
Publikováno v:
International Journal of Applied Earth Observations and Geoinformation, Vol 112, Iss , Pp 102894- (2022)
The task of representing remotely sensed scattered point clouds with mathematical surfaces is ubiquitous to reduce a high number of observations to a compact description with as few coefficients as possible. To reach that goal, locally refined B-spli
Externí odkaz:
https://doaj.org/article/a3223f1036ce4398b9212d383b13afa4
Autor:
Gaël Kermarrec, Steffen Schön
Publikováno v:
Earth, Planets and Space, Vol 72, Iss 1, Pp 1-16 (2020)
Abstract Microwave electromagnetic signals from the Global Navigation Satellite System (GNSS) are affected by their travel through the atmosphere: the troposphere, a non-dispersive medium, has an especial impact on the measurements. The long-term var
Externí odkaz:
https://doaj.org/article/013cbc68ca5e4bc7a216362046aae1ed
Publikováno v:
Remote Sensing, Vol 14, Iss 23, p 6164 (2022)
Geodesy is the science of accurately measuring the topography of the earth (geometric shape and size), its orientation in space, and its gravity field. With the advances in our knowledge and technology, this scientific field has extended to the under
Externí odkaz:
https://doaj.org/article/58c90ff21d6f44eeaa78e7994265221c
Publikováno v:
Remote Sensing, Vol 14, Iss 20, p 5099 (2022)
Terrestrial laser scanners (TLS) are contact-free measuring sensors that record dense point clouds of objects or scenes by acquiring coordinates and an intensity value for each point. The point clouds are scattered and noisy. Performing a mathematica
Externí odkaz:
https://doaj.org/article/90d307bdd8584404bb3de367f7764812
Publikováno v:
Remote Sensing, Vol 13, Iss 13, p 2494 (2021)
T-splines have recently been introduced to represent objects of arbitrary shapes using a smaller number of control points than the conventional non-uniform rational B-splines (NURBS) or B-spline representatizons in computer-aided design, computer gra
Externí odkaz:
https://doaj.org/article/ef3b2a4e0c104149841d16033f38b744
Publikováno v:
IEEE Transactions on Aerospace and Electronic Systems. 58:766-780
Publikováno v:
Optimal Surface Fitting of Point Clouds Using Local Refinement ISBN: 9783031169533
With the development of high rate sensors based on LIDAR (light detection and ranging) and sonar technology, geospatial data representing terrain or seabed often contains millions of points. Performing a surface approximation of the point clouds is a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::320a8adc4b208be605dcfb28436539b0
https://doi.org/10.1007/978-3-031-16954-0_1
https://doi.org/10.1007/978-3-031-16954-0_1
Publikováno v:
Optimal Surface Fitting of Point Clouds Using Local Refinement ISBN: 9783031169533
The univariate minimal support B-spline basis (UMB) has been used in Computer Aided Design (CAD) since the 1970s. Freeform curves use UMB, while sculptured surfaces are represented using a tensor product of two UMBs. The coefficients of a B-spline cu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::da9ce354787e5b1d868dc450bbe75fed
https://doi.org/10.1007/978-3-031-16954-0_2
https://doi.org/10.1007/978-3-031-16954-0_2