公开(公告)号：US11481894B1

公开(公告)日：2022-10-25

申请号：US17584275

申请日：2022-01-25

Applicant: China University of Petroleum-Beijing

Inventor： Linlin Wang ,  Zhilei Luo ,  Kaikai Jia ,  Yanchang Deng

IPC: G06K9/00 ,  G06T7/00 ,  G06T7/70 ,  G06V10/74 ,  G06V10/75 ,  G01M11/08 ,  G01B11/16 ,  G01B15/06

Abstract: A method, apparatus and system for calculating stress parameters is provided. The method comprises establishing a first image pyramid according to an image of a sample before deformation, and establishing a second image pyramid corresponding to the first image pyramid according to an image of the sample after deformation; starting from a top level in the first image pyramid, iteratively calculating displacement information on each level in the first image pyramid relative to a corresponding level in the second image pyramid based on a center point of each sub-region at each level in the first image pyramid and other positions in the sub-region; calculating strain information on the sample according to displacement information on a bottom level of the first image pyramid; and calculating stress parameters of the sample based on the strain information.