Automated extraction of coastline from satellite imagery by integrating Canny edge detection and locally adaptive thresholding methods

Authors: H. Liu1; K. C. Jezek2

Source: International Journal of Remote Sensing, Volume 25, Number 5, 2004 , pp. 937-958(22)

Publisher: Taylor and Francis Ltd

Key:
Free Content - Free Content
New Content - New Content
Subscribed Content - Subscribed Content
Free Trial Content - Free Trial Content

Abstract:

This paper presents a comprehensive approach to effectively and accurately extract coastlines from satellite imagery. It consists of a sequence of image processing algorithms, in which the key component is image segmentation based on a locally adaptive thresholding technique. Several technical innovations have been made to improve the accuracy and efficiency for determining the land/water boundaries. The use of the Levenberg-Marquardt method and the Canny edge detector speeds up the convergence of iterative Gaussian curve fitting process and improves the accuracy of the bimodal Gaussian parameters. The result is increased reliability of local thresholds for image segmentation. A series of further image processing steps are applied to the segmented images. Particularly, grouping and labelling contiguous image regions into individual image objects enables us to utilize heuristic human knowledge about the size and continuity of the land and ocean masses to discriminate the true coastline from other object boundaries. The final product of our processing chain is a vector-based line coverage of the coastline, which can be readily incorporated into a GIS database. Our method has been applied to both radar and optical satellite images, and the positional precision of the resulting coastline is measured at the pixel level.

Document Type: Research article

DOI: 10.1080/0143116031000139890

Affiliations: 1: Department of Geography Texas A&M University College Station Texas 77843 USA, Email: liu@geog.tamu.edu 2: Byrd Polar Research Center The Ohio State University Columbus Ohio 43210 USA

The full text electronic article is available for purchase. You will be able to download the full text electronic article after payment.

$45.29 plus tax      Refund Policy

 

OR

Back to top

Key:
Free Content - Free Content
New Content - New Content
Subscribed Content - Subscribed Content
Free Trial Content - Free Trial Content
Share this item with others: These icons link to social bookmarking sites where readers can share and discover new web pages.
Page Help Click here for Page Help
Shopping cart
Tools
Sign in






Need to register?
Sign up here
Text size: A | A | A | A