NDLI: Extraction of shape elements in low-level processing for image understanding systems

Content Provider	IEEE Xplore Digital Library
Author	Macieszczak, M. Ahmad, M.O.
Copyright Year	1995
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, Que., Canada (Macieszczak, M.; Ahmad, M.O.)
Abstract	Extraction of shape elements from images is one of the most important tasks in scene analysis systems. In the approach presented in this paper the extraction of shape elements is based on the polygonal decomposition of the interior of the object in the scene and on the description of its boundaries (edges). The interior decomposition is done using squared polygons (prime components). The boundaries of the object are determined using a modified Sobel operator. After the decomposition of the interior of the object and detecting its boundaries, a discrete set of points representing the edges and coordinates of the prime components is processed by a nonlinear algorithm. The purpose of this preprocessing is to remove the discontinuities and to produce a discrete skeleton of the object. The final stage of the extraction is to transform the discrete skeleton of the object into its shape description (shape descriptor). This process is carried out by matching the B-spline curves to the whole discreet skeleton of the object. The resulting shape descriptor of the object is composed of a set of extracted shape elements (set of B-spline curves) and an interrelation among them.
Starting Page	1184
Ending Page	1187
File Size	411117
Page Count	4
File Format	PDF
ISBN	0780327667
ISSN	08407789
DOI	10.1109/CCECE.1995.526674
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-09-05
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Shape Layout Skeleton Spline Signal processing Image analysis Object detection Image edge detection Signal processing algorithms Discrete transforms
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Hardware and Architecture

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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