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arXiv 0912.0159math.DG
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等照度曲线几何学

Geometry of isophote curves

Andre Diatta, Peter Giblin

摘要:

本文考虑二维图像的强度曲面,研究了单参数等强度曲线族的对称集(和中轴)的演化。这推广了对单参数光滑平面曲线族(Bruce和Giblin,Giblin和Kimia等)的研究。当曲线族包括奇异成员时的一般情况,如如果曲线是通过在平面与表面相切的时刻取光滑表面的平面截面而获得的,则会发生这种情况。将这些表面部分视为嵌入在真实平面中的图像的像素值的等照度曲线,这允许我们提出使用骨架或对称集表示来组合对象表示,以及通过将图像信息表示为图像的水平集的中间表示的集合来组合外观建模。

英文摘要:

In this paper, we consider the intensity surface of a 2D image, we study the evolution of the symmetry sets (and medial axes) of 1-parameter families of iso-intensity curves. This extends the investigation done on 1-parameter families of smooth plane curves (Bruce and Giblin, Giblin and Kimia, etc.) to the general case when the family of curves includes a singular member, as will happen if the curves are obtained by taking plane sections of a smooth surface, at the moment when the plane becomes tangent to the surface. Looking at those surface sections as isophote curves, of the pixel values of an image embedded in the real plane, this allows us to propose to combine object representation using a skeleton or symmetry set representation and the appearance modelling by representing image information as a collection of medial representations for the level-sets of an image.

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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