等照度曲线及其特征
On isophote curve and its characterizations
摘要：
等像线包括表面点的轨迹，这些表面点的法向量与固定向量成恒定角度。本文的主要目的是通过达布标架求出等照度线的轴线，进而给出等照度线及其轴线的一些特征。特别地，对于位于管道表面上的等照度线，将再次获得其他表征。
英文摘要：
Isophote comprises a locus of the surface points whose normal vectors make a constant angle with a fixed vector. Main objective of this paper is to find the axis of an isophote curve via its Darboux frame and afterwards to give some characterizations about isophote and its axis. Particularly, for isophotes lying on a canal surface will be obtained other characterizations again.
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。
