公开(公告)号：US20240394916A1

公开(公告)日：2024-11-28

申请号：US18796302

申请日：2024-08-07

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Lei Zhang ,  Guannan Jiang ,  Fei Chen

IPC: G06T7/73 ,  G06T3/02 ,  G06T7/13 ,  G06T7/62 ,  H04N17/00

Abstract: Embodiments of this application provide a method and apparatus for testing stability of a vision system, which can test whether the vision system is stable, so as to report a fault in a timely manner when the vision system is unstable, thereby guaranteeing accuracy of a measurement result of the vision system. The method includes: obtaining first position information of a spot inspection piece in a current image under the vision system; performing affine transformation on a reference contour model of the spot inspection piece for a position of the spot inspection piece in the current image based on the first position information, and obtaining, through fitting, a current contour model of the spot inspection piece in the current image based on the reference contour model; and determining stability of the vision system based on the reference contour model and the current contour model.

公开(公告)号：US11935260B1

公开(公告)日：2024-03-19

申请号：US18187729

申请日：2023-03-22

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Tianhui Wu ,  Fei Chen ,  Guannan Jiang

IPC: G06T7/60 ,  G06T7/80

CPC classification number: G06T7/60 ,  G06T7/80 ,  G06T2207/30164 ,  G06T2207/30244

Abstract: This application provides a method for measuring dimensions to reduce measurement time and improve production efficiency, including: obtaining a first image and a second image of a to-be-measured workpiece, where the first image and the second image are images captured by a first camera and a second camera at different positions respectively; extracting a first corner set of the to-be-measured workpiece from the first image and a second corner set of the to-be-measured workpiece from the second image separately; rectifying position coordinates of the first corner set and position coordinates of the second corner set to obtain a position coordinate value of the first corner set and a position coordinate value of the second corner set in a same coordinate system; and obtaining dimensions of the to-be-measured workpiece based on the position coordinate value of the first corner set and the position coordinate value of the second corner set.