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SCIA
2009
Springer

Globally Optimal Least Squares Solutions for Quasiconvex 1D Vision Problems

11 years 8 months ago
Globally Optimal Least Squares Solutions for Quasiconvex 1D Vision Problems
Abstract. Solutions to non-linear least squares problems play an essential role in structure and motion problems in computer vision. The predominant approach for solving these problems is a Newton like scheme which uses the hessian of the function to iteratively find a local solution. Although fast, this strategy inevitably leeds to issues with poor local minima and missed global minima. In this paper rather than trying to develop an algorithm that is guaranteed to always work, we show that it is often possible to verify that a local solution is in fact also global. We present a simple test that verifies optimality of a solution using only a few linear programs. We show on both synthetic and real data that for the vast majority of cases we are able to verify optimality. Further more we show even if the above test fails it is still often possible to verify that the local solution is global with high probability.
Carl Olsson, Martin Byröd, Fredrik Kahl
Added 27 May 2010
Updated 27 May 2010
Type Conference
Year 2009
Where SCIA
Authors Carl Olsson, Martin Byröd, Fredrik Kahl
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