Improvements on Geometric Pattern Matching Problems
Improvements on Geometric Pattern Matching Problems
复制标题
几何图案匹配问题的改进
DOI:
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发表时间:
1992
期刊:
影响因子:
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通讯作者:
K. Kedem
中科院分区:
文献类型:
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作者:
L. Paul Chew;K. Kedem
We consider the following geometric pattern matching problem: find the minimum Hausdorff distance between two point sets under translation with L1 or L∞ as the underlying metric. Huttenlocher, Kedem, and Sharir have shown that this minimum distance can be found by constructing the upper envelope of certain Voronoi surfaces. Further, they show that if the two sets are each of cardinality n then the complexity of the upper envelope of such surfaces is Ω(n3). We examine the question of whether one can get around this cubic lower bound, and show that under the L1 and L∞ metrics, the time to compute the minimum Hausdorff distance between two point sets is On2 log2n).