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Convex hulls of finite sets of points in two and three dimensions
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Communications of the ACM archive
Volume 20 ,  Issue 2  (February 1977) table of contents
Pages: 87 - 93  
Year of Publication: 1977
ISSN:0001-0782
Authors
F. P. Preparata  Univ. of Illinois, Urbana
S. J. Hong  IBM Systems Product Division, Poughkeepsie, NY
Publisher
ACM  New York, NY, USA
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Downloads (6 Weeks): 31,   Downloads (12 Months): 235,   Citation Count: 57
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ABSTRACT

The convex hulls of sets of n points in two and three dimensions can be determined with O(n log n) operations. The presented algorithms use the “divide and conquer” technique and recursively apply a merge procedure for two nonintersecting convex hulls. Since any convex hull algorithm requires at least O(n log n) operations, the time complexity of the proposed algorithms is optimal within a multiplicative constant.


REFERENCES

Note: OCR errors may be found in this Reference List extracted from the full text article. ACM has opted to expose the complete List rather than only correct and linked references.

 
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GilBert , E.N., and Pollak, H. Steiner minimal trees. SIAM J. Appl. Math. 16, (1968), 1-29.
 
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Graham, R.L. An efficient algorithm for determining the convex hull of a finite planar set, Inform. Proc. Lett. 1 (1972), 132-133.
 
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Grtinbaum, B. Convex Polytopes. Wiley Interscience, New York, 1967.
 
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Jarvis, R.A. On the identification of the convex hull of a finite set of points in the plane. Inform. Proc. Lett. 2, (1973), 18-21.
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Shamos, M.I. Problems in computational geometry. Dep. Comptr. Sci., Yale U., New Haven, Conn., May 1975.
 
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Sklansky, J. Measuring concavity on a rectangular mosaic, IEEE Trans. Comptrs. C-21 (Dec. 1972), 1355-1364.
 
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Yao, F.F. On finding the maximal elements in a set of plane vectors. Comptr. Sci. Dep. Rep., U. of Illinois at Urbana- Champaign, Urbana, Ill., July 1974.

CITED BY  58

Collaborative Colleagues:
F. P. Preparata: colleagues
S. J. Hong: colleagues