US 11,756,186 B2
Workpiece inspection and defect detection system utilizing color channels
Mark Lawrence Delaney, Shoreline, WA (US)
Assigned to Mitutoyo Corporation, Kanagawa-ken (JP)
Filed by Mitutoyo Corporation, Kanagawa-ken (JP)
Filed on Sep. 15, 2021, as Appl. No. 17/476,378.
Prior Publication US 2023/0082268 A1, Mar. 16, 2023
Int. Cl. G06T 7/00 (2017.01); H04N 23/74 (2023.01)
CPC G06T 7/001 (2013.01) [H04N 23/74 (2023.01); G06T 2207/10024 (2013.01); G06T 2207/10152 (2013.01); G06T 2207/20081 (2013.01); G06T 2207/30164 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A workpiece inspection and defect detection system, comprising:
a light source configuration that is configured to provide a plurality of color channels, with each color channel corresponding to a different color;
a lens configuration that inputs image light arising from a surface of a workpiece which is illuminated by the light source configuration, and transmits the image light along an imaging optical path;
a camera configuration that receives imaging light transmitted along the imaging optical path for providing workpiece images;
one or more processors; and
a memory coupled to the one or more processors and storing program instructions that when executed by the one or more processors cause the one or more processors to at least:
acquire training mode workpiece images for acquiring a plurality of sets of training mode workpiece image data, wherein each set of training mode workpiece image data comprises first color channel training mode workpiece image data corresponding to a first color channel, and second color channel training mode workpiece image data corresponding to a second color channel;
train a defect detection portion based at least in part on the plurality of sets of training mode workpiece image data;
acquire run mode workpiece images for acquiring a plurality of sets of run mode workpiece image data, wherein each set of run mode workpiece image data comprises first color channel run mode workpiece image data corresponding to the first color channel, and second color channel run mode workpiece image data corresponding to the second color channel; and
utilize the trained defect detection portion to perform analysis that is based at least in part on the plurality of sets of run mode workpiece image data to determine defect images that include workpieces with defects.