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Shape ultimate attribute opening
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DOI：10.1016/j.imavis.2011.05.001.png)
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Abstract
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The ultimate opening (UO) is a powerful segmentation operator recently introduced by Beucher [1]. It automatically selects the most contrasted regions of an image. However, in the presence of nested structures (e.g. text in a signboard or windows in a contrasted facade), interesting structures may be masked by the containing region. In this paper we focus on ultimate attribute openings and we propose a method that improves the results by favoring regions with a predefined shape via a similarity function. An efficient implementation using a max-tree representation of the image is proposed. The method is validated in the framework of three applications: facade analysis, scene-text detection and cell segmentation. Experimental results show that the proposed method yields better segmentation results than UO. (C) 2011 Elsevier B.V. All rights reserved.
Keywords:
Ultimate opening
Attribute opening
Mathematical morphology
Shape information
Image segmentation
Facade analysis
Scene-text detection
Cell segmentation
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