Approximating Minimum Bending Energy Path in a Simple Corridor

Abstract. In this paper, we consider the problem of computing a minimum bending energy path (or MinBEP) in a simple corridor. Given a simple 2D corridor C bounded by straight line segments and arcs of radius 2r, the MinBEP problem is to compute a path P inside C and crossing two pre-specified points s and t located at each end of C so that the bending energy of P is minimized. For this problem, we first show how to lower bound the bending energy of an optimal curve with bounded curvature, and then use this lower bound to design a (1 + )-approximation algorithm for this restricted version of the MinBEP problem. Our algorithm is based on a number of interesting geometric observations and approximation techniques on smooth curves, and can be easily implemented for practical purpose. It is the first algorithm with a guaranteed performance ratio for the MinBEP problem.

• Type: Journal
• Year: 2010
• Where: ISAAC
• Authors: Jinhui Xu, Lei Xu, Yulai Xie
• Keywords: Algorithms, ISAAC 2010, Lower Bound, MinBEP Problem, Minimum Bending Energy