Patent ID: 11960034
Assignee: NANJING UNIVERSITY OF SCIENCE AND TECHNOLOGY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 6:
7. The method according to claim 1, wherein the searching for the corners of the two-dimensional checkerboards by using a photo of the three-dimensional towered checkerboard captured by a camera, and obtaining the corner point set of the two-dimensional checkerboards on the photo comprises:
sequentially obtaining target checkerboard areas having consistent lengths and widths as the two-dimensional checkerboards from the photo of the three-dimensional towered checkerboard;
every time a group of the target checkerboard areas is obtained, setting the target checkerboard areas black until the photo of the three-dimensional towered checkerboard does not contain the target checkerboard areas; and
arranging checkerboard corners in all the target checkerboard areas from left to right and from top to bottom, to obtain the corner point set of the two-dimensional checkerboards on the photo.