Patent ID: 11893725
Assignee: CENTRAL SOUTH UNIVERSITY
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 7:
8. The method for evaluating the geometric form of the honeycomb product according to claim 1, wherein a method for extracting the vertices comprises steps of:
acquiring a skeleton diagram of the honeycomb product;
acquiring a sequence of boundary pixels of a cell by extracting boundary pixels belonging to the same cell from the skeleton image;
acquiring a sequence of included angles corresponding to the boundary pixels by acquiring the included angles corresponding to the boundary pixels respectively, wherein each of the included angles is an included angle between connecting lines of one of the boundary pixels with two pixels, in the sequence of the boundary pixels, that are separated from the one of the boundary pixels by a first preset number of pixels respectively, at both sides of the one of the boundary pixels;
performing non-minimum suppression on the sequence of included angles by using a window having a size of a second preset value, wherein included angles other than an included angle with a minimum value in the window are set as first preset included angles;
determining, when the non-minimum suppression on the sequence of included angles is completed, the boundary pixels corresponding to included angles smaller than a second preset included angle among all the minimum values, as the vertices.