Articles | Volume 4, issue 1
Geosci. Instrum. Method. Data Syst., 4, 23–34, 2015
Geosci. Instrum. Method. Data Syst., 4, 23–34, 2015

Research article 11 Feb 2015

Research article | 11 Feb 2015

Image georectification and feature tracking toolbox: ImGRAFT

A. Messerli and A. Grinsted

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Cited articles

Ahn, Y. and Box, J. E.: Instruments and Methods Glacier velocities from time-lapse photos: technique development and first results from the Extreme Ice Survey (EIS) in Greenland, J. Glaciol., 56, 723–734, 2010.
Ahn, Y. and Howat, I. M.: Efficient Automated Glacier Surface Velocity Measurement From Repeat Images Using Multi-Image/Multichip and Null Exclusion Feature Tracking, IEEE T. Geosci. Remote, 49, 2838–2846, 2011.
Aschenwald, J., Leichter, K., Tasser, E., and Tappeiner, U.: Spatio-temporal landscape analysis in mountainous terrain by means of small format photography: a methodological approach, IEEE T. Geosci. Remote, 39, 885–893, 2001.
Benn, D. I. and Evans, D. J. A.: Glaciers and Glaciation, 2nd Edn., Hodder Arnold Publication, Hodder Education, London, 2010.
Bradski, G.: OpenCV Library, Dr. Dobb's J. Softw. Tool., 25, 122–125, 2000.
Short summary
The use of time-lapse cameras is becoming an ever more popular method of observing changes in the natural environment. This study provides an overview of the newly developed Image GeoRectification And Feature Tracking toolbox (ImGRAFT). The paper outlines the main function of the toolbox and describes each of the key processes needed to transform a pair of terrestrial time-lapse images into a velocity field. The tool is presented using a case study of glacier surface motion at Engabreen, Norway.