NDLI: Efficient algorithms for orthogonal polygon approximation

Content Provider	IEEE Xplore Digital Library
Author	Chen, D.Z. Hu, X. Blatner, P.J.
Copyright Year	1996
Description	Author affiliation: Dept. of Comput. Sci. & Eng., Notre Dame Univ., IN, USA (Chen, D.Z.)
Abstract	In applications such as VLSI floorplanning, pattern recognition and image processing, an important problem is to compress the data needed to represent certain geometric structures subject to some approximation criteria so that manipulating these structures would not require excessive amount of computing resources. Techniques based on polygonal approximation have been used increasingly in such applications. In this paper, we present two efficient yet very simple algorithms to solve the convex orthogonal polygon approximation problem. One of our algorithms takes O(n/sup 3/ log k//spl radic/(log n)) time and O(n/sup 2/) space. The other algorithm only takes O(n) space with the time complexity of O(n/sup 3/k). The previously best known algorithm solves the same problem using O(n/sup 5/) time and O(n/sup 4/) space. In addition to the improvement in both time and space complexities, our algorithms are also simple to understand and simple to implement. Our techniques and observations are quite general in their own right and may be applicable to other problems.
Starting Page	779
Ending Page	782
File Size	498396
Page Count	4
File Format	PDF
ISBN	0780330730
DOI	10.1109/ISCAS.1996.542185
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1996-05-15
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Approximation algorithms Very large scale integration Image processing Image coding Computer science Application software Design automation Image recognition Physics computing Minimization methods
Content Type	Text
Resource Type	Article

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