公开(公告)号：US20210215619A1

公开(公告)日：2021-07-15

申请号：US16320880

申请日：2017-10-02

Applicant: TELEDYNE DIGITAL IMAGING, INC.

Inventor： Felicia Yan SHU ,  Matthias SONDER ,  Dale DEERING

IPC: G01N21/89 ,  G01N21/898

Abstract: A method of synchronizing a line scan camera. The method comprises: obtaining line scan data of a region of interest (ROI) of a travelling surface from the line scan camera, the line scan camera being oriented perpendicular to a direction of travel of the travelling surface, the line scan data comprising a plurality of lines; identifying occurrences of a major frequency of a repeated texture on the travelling surface using characterized line scan data for each line in the plurality of lines of the line scan data; determining a period of the major frequency; and changing a line rate of the line scan camera when the determined period is different than a reference period.