The maximum exposure problem
The maximum exposure problem
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最大曝光问题
DOI:
10.1016/j.comgeo.2022.101861
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Suri, Subhash
中科院分区:
文献类型:
--
作者:
Kumar, Neeraj;Sintos, Stavros;Suri, Subhash
Given a set of points P and axis-aligned rectangles R in the plane, a point p∈ P is called exposed if it lies outside all rectangles in R. In the max-exposure problem, given an integer parameter k, we want to delete k rectangles from R so as to maximize the number of exposed points. We show that the problem is NP-hard and assuming plausible complexity conjectures is also hard to approximate even when rectangles in R are translates of two fixed rectangles. However, if R only consists of translates of a single rectangle, we present a polynomial-time approximation scheme. For range space defined by general rectangles, we present a simple O (k) bicriteria approximation algorithm; that is by deleting O (k 2) rectangles, we can expose at least Ω (1/k) of the optimal number of points.