Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Johannes Otepka"'
Autor:
Benjamin Wild, Geert J. Verhoeven, Martin Wieser, Camillo Ressl, Jona Schlegel, Stefan Wogrin, Johannes Otepka-Schremmer, Norbert Pfeifer
Publikováno v:
Heritage, Vol 5, Iss 4, Pp 2987-3009 (2022)
Admired and despised, created and destroyed, legal and illegal: Contemporary graffiti are polarising, and not everybody agrees to label them as cultural heritage. However, if one is among the steadily increasing number of heritage professionals and a
Externí odkaz:
https://doaj.org/article/d586042cd7f8494db199f7b01ba23078
Autor:
Philipp Glira, Christoph Weidinger, Johannes Otepka-Schremmer, Camillo Ressl, Norbert Pfeifer, Michaela Haberler-Weber
Publikováno v:
Remote Sensing, Vol 15, Iss 22, p 5348 (2023)
Nonrigid registration presents a significant challenge in the domain of point cloud processing. The general objective is to model complex nonrigid deformations between two or more overlapping point clouds. Applications are diverse and span multiple r
Externí odkaz:
https://doaj.org/article/f3fde23655d7474683a438638b520a99
Publikováno v:
Remote Sensing, Vol 14, Iss 10, p 2303 (2022)
The number of high and very high resolution (VHR) optical satellite sensors, as well as the number of medium resolution satellites is continuously growing. However, not all high-resolution optical satellite imaging cameras have a sufficient and stabl
Externí odkaz:
https://doaj.org/article/f8eda2287f2047918ce7ed7fafe7d00d
Potential of Pléiades and WorldView-3 Tri-Stereo DSMs to Represent Heights of Small Isolated Objects
Publikováno v:
Sensors, Vol 20, Iss 9, p 2695 (2020)
High-resolution stereo and multi-view imagery are used for digital surface model (DSM) derivation over large areas for numerous applications in topography, cartography, geomorphology, and 3D surface modelling. Dense image matching is a key component
Externí odkaz:
https://doaj.org/article/df82cdba4134424191c78e95da58adef
Autor:
Stefan Bachhofner, Ana-Maria Loghin, Johannes Otepka, Norbert Pfeifer, Michael Hornacek, Andrea Siposova, Niklas Schmidinger, Kurt Hornik, Nikolaus Schiller, Olaf Kähler, Ronald Hochreiter
Publikováno v:
Remote Sensing, Vol 12, Iss 8, p 1289 (2020)
We studied the applicability of point clouds derived from tri-stereo satellite imagery for semantic segmentation for generalized sparse convolutional neural networks by the example of an Austrian study area. We examined, in particular, if the distort
Externí odkaz:
https://doaj.org/article/69e8d9a3b73e4fe487d8e728755c37c6
Publikováno v:
ISPRS International Journal of Geo-Information, Vol 2, Iss 4, Pp 1038-1065 (2013)
This paper presents a survey of georeferenced point clouds. Concentration is, on the one hand, put on features, which originate in the measurement process themselves, and features derived by processing the point cloud. On the other hand, approaches f
Externí odkaz:
https://doaj.org/article/07d4bc0caee740899946c795f29dadac
Autor:
Martin Wieser, Gottfried Mandlburger, Markus Hollaus, Johannes Otepka, Philipp Glira, Norbert Pfeifer
Publikováno v:
Remote Sensing, Vol 9, Iss 11, p 1154 (2017)
Diameter at breast height (DBH) is one of the most important parameter in forestry. With increasing use of terrestrial and airborne laser scanning in forestry, new exceeding possibilities to directly derive DBH emerge. In particular, high resolution
Externí odkaz:
https://doaj.org/article/1d5050b89df14852abc88e909b0987bc
Autor:
Pfeifer, Benjamin Wild, Geert J. Verhoeven, Martin Wieser, Camillo Ressl, Jona Schlegel, Stefan Wogrin, Johannes Otepka-Schremmer, Norbert
Publikováno v:
Heritage; Volume 5; Issue 4; Pages: 2987-3009
Admired and despised, created and destroyed, legal and illegal: Contemporary graffiti are polarising, and not everybody agrees to label them as cultural heritage. However, if one is among the steadily increasing number of heritage professionals and a
Autor:
Wilfried Karel, B. Wöhrer, Norbert Pfeifer, Johannes Otepka, Camillo Ressl, Gottfried Mandlburger
Publikováno v:
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol V-2-2021, Pp 35-42 (2021)
Modern data acquisition with active or passive photogrammetric imaging techniques generally results in 3D point clouds. Depending on the acquisition or processing method, the spacing of the individual points is either uniform or irregular. In the lat
Publikováno v:
ISPRS Journal of Photogrammetry and Remote Sensing. 168:28-40
We present an approach for automatically detecting the positions of tree trunks, for determining their corresponding diameter at breast height (DBH), and for assessing the shape of tree trunks from 3D point clouds derived from unmanned aerial vehicle