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Proceedings Paper

Active grid for feature extraction in remote sensing imagery
Author(s): Yu Zhang; Xiaodong Zhang
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Paper Abstract

In this paper, an enhanced active contour, namely active grid, is proposed and its application in extracting boundaries from targets which have adjacency topology, such as buildings, fields, road and river etc, is further introduced in more details. In fact, boundaries extraction by general active contour may be regarded as one kind of simplified active grid, which contains only single region. The basic principle of active grid is: an initial grid given by either manual or automatic methods in order to provide the correct topological structure and a starting grid. Then, based on an iterative algorithm, this grid can evolve according to the information of local image. Nodes (or boundaries) of grid are driven by forces of statistics from different grid region in target image. The evolvement of active grid can be represented by an energy function, as a result, the extreme value of energy is corresponding to the correct extraction of target. The experiment results indicate that the active grid is very effective in target extraction from imagery.

Paper Details

Date Published: 30 October 2009
PDF: 8 pages
Proc. SPIE 7495, MIPPR 2009: Automatic Target Recognition and Image Analysis, 74954R (30 October 2009); doi: 10.1117/12.832959
Show Author Affiliations
Yu Zhang, Yangtze River Scientific Research Institute (China)
Xiaodong Zhang, Wuhan Univ. (China)

Published in SPIE Proceedings Vol. 7495:
MIPPR 2009: Automatic Target Recognition and Image Analysis
Tianxu Zhang; Bruce Hirsch; Zhiguo Cao; Hanqing Lu, Editor(s)

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