Skip to main content Accessibility help
×
Home

Two-dimensional analysis of ice ridging in the Beaufort Sea using aerial photography

  • J. E. Lewis (a1), P. Budkewitsch (a2), G. Newton (a3), M. Sayed (a4) and R. M. W. Frederking (a4)...

Abstract

Aerial photography was obtained for the Beaufort Sea north of Tuktoyaktuk. The flight path covered two distinct ice zones over a 15.5 km transect extending perpendicular to the coast, yielding fifty-nine photographs at a scale of 1 : 2000. The process of ridge extraction was automated using a series of computer algorithms for image filtering, edge detection and edge linking. Examples from two different sections along the transect are chosen for presentation: (a) a heavily ridged area, and (b) an area with one dominant linear ridge feature that separates ice cover of different age. Two parameters used in the automated process, a minimum edge gradient and minimum number of connected pixels said to form a continuous ridge segment, influence the number, length and spatial pattern of extracted ridges. Direct one-to-one correlations between manually interpreted ridges from photographs and the algorithm extracted ridges from digital data are not always possible. However, results indicate that the automated ridge extraction procedure reliably characterizes the overall direction and density of the ice ridges. The distribution of the ice-ridge directions is estimated from circular (angular) histograms constructed directly from the digital data. Analysis of the Beaufort Sea transect reveals that the ice ridging is strongly anisotropic, with a principal direction parallel to the local coastline.

  • View HTML
    • Send article to Kindle

      To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      Two-dimensional analysis of ice ridging in the Beaufort Sea using aerial photography
      Available formats
      ×

      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

      Two-dimensional analysis of ice ridging in the Beaufort Sea using aerial photography
      Available formats
      ×

      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

      Two-dimensional analysis of ice ridging in the Beaufort Sea using aerial photography
      Available formats
      ×

Copyright

References

Hide All
Ballard, D.H. Brown, C.M. 1982 Computer mien. Englewood Cliffs, NJ, Prentice–Hall.
Davis, L.S. 1975 A survey of edge detection techniques. Comput. Graph. Image Proc., 4, 248270.
Eppler, D.T. Farmer, L.D. 1991 Texture analysis of radiometric signatures of new sea ice forming in Arctic leads. IEEE Trans. Geosci. Remote Sensing, 29(2), 233241.
Giardina, C.R. Dougherty, E.R. 1988 Morphological methods in image and signal processing. Englewood Cliffs, NJ, Prentice–Hall.
Kasvand, T. 1974 Iterative edge detection. Comput. Graph. Image Proc, 4, 279286.
Lewis, J.E. Budkewitsch, P. 1993 Automated extraction of ice ridge structures in the Beaufort Sea. Ottawa, National Research Council, internal report.
Martelli, A. 1972 Edge detection using heuristic search methods. Comput. Graph. Image Proc, 1, 169182.
Newton, K.G. Budkewitsch, P. 1989 Lithotectonic domain identification by statistical analysis of visually and computer–aided edge–detected lineaments: a case study from Cape Smith tectonic belt, New Quebec. In Proceedings of the Seventh Thematic Conference on Remole Sensing for Exploration Geology. Calgary, Alhtrta, Canada. October 2–6. Ann Arbor, MI, Environmental Research Institute of Michigan, 861875.
Newton, G. Kendrick, B. 1990 Image processing in taxonomy. Sydowia, 42, 246272.
Robin, P.–Y. Jowett, E.C. 1986 Computerized density contouring and statistical evaluation of orientation data using counting circles and continuous weighting functions. Tectonophysics, 121, 207223.
Samadani, R. Vesecky, J.F. 1990 Finding curvilinear features in speckled images. IEEE Trans. Geosci. Remole Sensing, 28, 669673.
Simila, M. Lepparanta, M. Granberg, H.B. Lewis, J.E. 1992 The relation between SAR imagery and regional sea ice ridging characteristics from BEPERS–88. Int. J. Remote Sensing, 13(13), 24152432.
Vesecky, J.F. , Smith, M.P. Samadani, R. 1990 Extraction of lead and ridge characteristics from SAR images of sea ice. IEEE Trans. Geosci. Remote Sensing, 28(4), 740744.

Two-dimensional analysis of ice ridging in the Beaufort Sea using aerial photography

  • J. E. Lewis (a1), P. Budkewitsch (a2), G. Newton (a3), M. Sayed (a4) and R. M. W. Frederking (a4)...

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed