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arXiv 0908.1649math.OC
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平面运输问题原始对偶法的改进

Improving the primal-dual algorithm for the transportation problem in the plane

Thomas Kaijser

摘要:

平面上的运输问题--如何以最便宜的方式将一组物体从一组点移动到另一组点--是一个非常古老的问题,可以追溯到几百年前。近年来,该问题的解决方案已经在数字图像分析中找到了应用,当搜索图像之间的相似性和差异时。然而,主要的缺点是寻找解决方案的计算时间长。本文给出了一些新的结果,利用这些结果可以大大减少求解平面内运输问题的时间。作为成本函数,我们选择平面上点之间的距离函数。我们既考虑距离函数等于普通欧几里得距离的情况,也考虑距离函数等于欧几里得距离的平方的情况。后一种距离函数的优点是,如果平面中的点的坐标是整数,则它是整数值的。

英文摘要:

The transportation problem in the plane - how to move a set of objects from one set of points to another set of points in the cheapest way - is a very old problem going back several hundreds of years. In recent years the solution of the problem has found applications in the analysis of digital images when searching for similarities and discrepancies between images. The main drawback, however, is the long computation time for finding the solution. In this paper we present some new results by which the time for solving the transportation problem in the plane can be reduced substantially. As cost-function we choose a distance-function between points in the plane. We consider both the case when the distance-function is equal to the ordinary Euclidean distance, as well as the case when the distance-function is equal to the square of the Euclidean distance. This latter distance-function has the advantage that it is integer-valued if the coordinates of the points in the plane are integers.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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