本文提出一种基于凸包的齿痕点的快速定位方法。在详细讨论了如何将图形学中的经典凸包算法应用于数字化中医舌诊的齿痕定位中后，通过相关舌图做实验，证明了该方法在快速齿痕点特征提取中的可行性、有效性和准确性。关键词: 凸包；齿痕；Graham算法；舌诊Abstract: This paper provides a method of Tooth-Marked rapid locating base on Convex Hulls. It is discussed in detail how the convex hull traditional arithmetic of computer graphics be use in the Tooth-Marked rapid locating in digital Chinese Medicine Tongues diagnosis. Then the feasibility, efficiency and veracity of the method were verified by relevant experimental of digital tongue images.Key Word: Convex Hulls； Tooth-Marked ；Graham algorithm；Tongue Diagnosis