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| Titel |
Image georectification and feature tracking toolbox: ImGRAFT |
| VerfasserIn |
A. Messerli, A. Grinsted |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
2193-0856
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| Digitales Dokument |
URL |
| Erschienen |
In: Geoscientific Instrumentation, Methods and Data Systems ; 4, no. 1 ; Nr. 4, no. 1 (2015-02-11), S.23-34 |
| Datensatznummer |
250115230
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| Publikation (Nr.) |
 copernicus.org/gi-4-23-2015.pdf |
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| Zusammenfassung |
| The use of time-lapse camera systems is becoming an increasingly popular
method for data acquisition. The camera setup is often cost-effective and
simple, allowing for a large amount of data to be accumulated over a variety
of environments for relatively minimal effort. The acquired data can, with
the correct post-processing, result in a wide range of useful quantitative
and qualitative information in remote and dangerous areas. The
post-processing requires a significant amount of steps to transform images
into meaningful data for quantitative analysis, such as velocity fields. To
the best of our knowledge at present a complete, openly available package
that encompasses georeferencing, georectification and feature tracking of
terrestrial, oblique images is still absent. This study presents a complete,
yet adaptable, open-source package developed in MATLAB, that addresses and
combines each of these post-processing steps into one complete suite in the
form of an "Image GeoRectification and Feature Tracking" (ImGRAFT:
http://imgraft.glaciology.net) toolbox. The toolbox can also
independently produce other useful outputs, such as viewsheds, georectified
and orthorectified images. ImGRAFT is primarily focused on terrestrial
oblique images, for which there are currently limited post-processing options
available. In this study, we illustrate ImGRAFT for glaciological applications
on a small outlet glacier Engabreen, Norway. |
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