US 12,254,605 B2
Systems for width measurement corrections of test specimens based on background brightness data of captured images
Christian J. Hoehl, Ober-Ramstadt (DE); and Michael Ashman, Natick, MA (US)
Assigned to Illinois Tool Works Inc., Glenview, IL (US)
Filed by Illinois Tool Works Inc., Glenview, IL (US)
Filed on Oct. 30, 2023, as Appl. No. 18/497,440.
Application 18/497,440 is a continuation of application No. 16/894,065, filed on Jun. 5, 2020, granted, now 11,803,943.
Claims priority of provisional application 62/866,391, filed on Jun. 25, 2019.
Prior Publication US 2024/0193745 A1, Jun. 13, 2024
Int. Cl. H04N 23/71 (2023.01); G06T 5/77 (2024.01); G06T 7/246 (2017.01); H04N 25/63 (2023.01)
CPC G06T 5/77 (2024.01) [G06T 7/248 (2017.01); H04N 23/71 (2023.01); H04N 25/63 (2023.01)] 20 Claims
OG exemplary drawing
 
1. A system for correcting a measurement of a test specimen, the system comprising:
an imaging device configured to capture at least one image of the test specimen; and
a processing system comprising a memory storing an edge detection algorithm and reference data, the processing system configured to:
receive the at least one image of the test specimen from the imaging device;
measure, in the at least one image, a perceived edge-position at one or more positions along an edge of the test specimen;
execute the edge detection algorithm to determine, based on background brightness data of the perceived edge-position, a difference between the perceived edge-position and a reference edge-position of the reference data;
calculate, using the difference, a correction term; and
generate corrected measurement data based on the correction term, wherein the corrected measurement data comprises a corrected width, and the generating of the corrected width comprises adding or subtracting the correction term to or from a measured width of the test specimen.