Investigation of a Hybrid Algorithm for Sea Ice Drift Measurements Using Synthetic Aperture Radar Images
Artikel i vetenskaplig tidskrift, 2014

Areal matching by phase correlation and feature tracking are two complementary methods used to measure sea ice drift between synthetic aperture radar images. This paper evaluates a new algorithm that combines the two methods. Areal matching is improved by new methods to handle large motions and rotated ice. It is shown that areal rotation can be resolved using a frequency-domain approach. Image segmentation is a prerequisite for feature tracking and achieved by a new method that performs better than Otsu's method for two-component Gaussian mixture distributions. A circular weighted median filter is found to be suitable for the filtering of the motion field. The algorithm is evaluated through a thorough analysis of the response and sensitivity to various algorithm settings. The accuracy of the algorithm varies by up to 50% for one image pair within the studied range of parameter settings, thus indicating the need for a proper initialization of the algorithm.

feature tracking

sea ice motion

segmentation

SAR

C-band

rotation

phase correlation

synthetic aperture radar

Författare

Anders Berg

Chalmers, Rymd- och geovetenskap, Radarfjärranalys

Leif Eriksson

Chalmers, Rymd- och geovetenskap, Radarfjärranalys

IEEE Transactions on Geoscience and Remote Sensing

0196-2892 (ISSN)

Vol. 52 8 5023 - 5033 6678642

Ämneskategorier

Jordbruksvetenskap

Geovetenskap och miljövetenskap

Oceanografi, hydrologi, vattenresurser

Signalbehandling

Datorseende och robotik (autonoma system)

DOI

10.1109/TGRS.2013.2286500

Mer information

Skapat

2017-10-06