Efficient Automated Glacier Surface Velocity Measurement From Repeat Images Using Multi-Image/Multichip and Null Exclusion Feature Tracking

Observations of ice motion are critical for constraining ice sheet mass balance and contribution to sea level rise, as well as predicting future changes. A wealth of imagery now exists for measuring ice motion from space, but existing repeat-image feature-tracking (RIFT) algorithms require the selec...

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Bibliographic Details
Published in:IEEE transactions on geoscience and remote sensing 2011-08, Vol.49 (8), p.2838-2846
Main Authors: Yushin Ahn, Howat, I. M.
Format: Article
Language:English
Subjects:
Applied geophysics
Correlation
Earth
Earth sciences
Earth, ocean, space
Exact sciences and technology
Feature tracking
Ice
ice velocity
Internal geophysics
Pixel
Remote sensing
satellite images
Satellites
Tracking
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Summary:Observations of ice motion are critical for constraining ice sheet mass balance and contribution to sea level rise, as well as predicting future changes. A wealth of imagery now exists for measuring ice motion from space, but existing repeat-image feature-tracking (RIFT) algorithms require the selection of several location- and data-specific parameters and manual data editing and are therefore not efficient for processing large numbers of image pairs for differing regions. Here, we present the multiple-image/multiple-chip RIFT algorithm which does not involve any user-defined local/empirical parameters and has a higher matching success rate than conventional single-image single-chip correlation matching. We also present an efficient method for applying RIFT to null-value striped data, such as the Landsat-7 Enhanced Thematic Mapper Plus. This method offers the potential for fully automated processing of large data sets.
ISSN:0196-2892
1558-0644
DOI:10.1109/TGRS.2011.2114891