Improved Orthogonal T-Snake Model for Complex Water Boundary Extraction

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  • School of Remote Sensing and Information Engineering, Wuhan University, Wuhan 430079, China

Received date: 2014-08-12

  Revised date: 2014-12-25

  Online published: 2015-07-28

Supported by

Major Project of High-resolution Earth Observing System(No.08-Y30B07-9001-13/15)

Abstract

A topology adaptive snake (T-Snake) model based on orthogonal grids is introduced and improved in this paper, and a proper energy function is designed. A detection and handling mechanism for topological conflict that caused by island shaped hollow is proposed in the model, and therefore accurate extraction for complex boundary of river containing river islands is achieved. For the disadvantage of the need to manually construct the initial contour in the orthogonal T-Snake model, using the minimum fractal dimension to obtain one area of the water and automatically generate an initial contour. The experiment shows that the algorithm of this paper can accurately extract the boundary of the complex water which contains deeply concave regions or river islands, and it has higher accuracy and less time cost than classic Snake model and GVF Snake model.

Cite this article

MENG Lingkui, LÜ Qifei . Improved Orthogonal T-Snake Model for Complex Water Boundary Extraction[J]. Acta Geodaetica et Cartographica Sinica, 2015 , 44(6) : 670 -677 . DOI: 10.11947/j.AGCS.2015.20140404

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