A 1 log N parallel algorithm for detecting convex hulls on image boards.

Lin, J C; Lin, J Y · IEEE Trans Image Process · 1998

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Abstract

By finding the maximum and minimum of {yi-mxi|1=or<i=or<N} for certain slopes m, we propose here a simple and fast parallel algorithm to obtain the convex hull of N arbitrarily given points on an image board, The mathematical theory needed is included, and computation time is 1 log N.