Close Approximations of Minimum Rectangular Coverings
Författare
Summary, in English
We consider the problem of covering arbitrary polygons with rectangles. The rectangles must lie entirely within the polygon. (This requires that the interior angles of the polygon are all greater than or equal to 90 degrees.) We want to cover the polygon with as few rectangles as possible. This problem has an application in fabricating masks for integrated circuits.
In this paper we will describe the first polynomial algorithm, guaranteeing an O(log n) approximation factor, provided that the n vertices of the input polygon are given as polynomially bounded integer coordinates. By the same technique we also obtain the first algorithm producing a covering which is within a constant factor of the optimal in exponential time (compared to the doubly-exponential known before).
In this paper we will describe the first polynomial algorithm, guaranteeing an O(log n) approximation factor, provided that the n vertices of the input polygon are given as polynomially bounded integer coordinates. By the same technique we also obtain the first algorithm producing a covering which is within a constant factor of the optimal in exponential time (compared to the doubly-exponential known before).
Avdelning/ar
- Computer Science
Publiceringsår
1999
Språk
Engelska
Sidor
437-452
Publikation/Tidskrift/Serie
Journal of Combinatorial Optimization
Volym
3
Issue
4
Dokumenttyp
Artikel i tidskrift
Förlag
Springer
Ämne
- Computer Science
Nyckelord
- computational geometry
- covering polygons
- approximation algorithms
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 1382-6905