US 12,299,909 B2
Method and apparatus for high resolution measurement of a workpiece
Jeffrey Thomas Drake, Corning, NY (US); Russell Wayne Madara, Corning, NY (US); Brett Christopher Shelton, Corning, NY (US); Jay Katsuhiko Stearns, Corning, NY (US); Eric Daniel Treacy, Beaver Dams, NY (US); David John Worthey, Pine City, NY (US); and Amanda Nicole Yoder, Christiansburg, VA (US)
Assigned to Corning Incorporated, Corning, NY (US)
Appl. No. 17/771,597
Filed by CORNING INCORPORATED, Corning, NY (US)
PCT Filed Oct. 29, 2020, PCT No. PCT/US2020/057838
§ 371(c)(1), (2) Date Apr. 25, 2022,
PCT Pub. No. WO2021/087029, PCT Pub. Date May 6, 2021.
Claims priority of provisional application 62/928,847, filed on Oct. 31, 2019.
Prior Publication US 2022/0366579 A1, Nov. 17, 2022
Int. Cl. G06T 7/33 (2017.01); G06T 7/00 (2017.01); G06T 7/62 (2017.01)
CPC G06T 7/33 (2017.01) [G06T 7/0004 (2013.01); G06T 7/62 (2017.01); G06T 2207/30164 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An imaging system for measuring dimensions of a workpiece comprising a honeycomb body or a honeycomb extrusion die comprising:
a camera configured to capture images of the workpiece;
an actuator configured to move the camera relative to the workpiece or the workpiece relative to the camera;
a processor in data communication with the camera and the actuator and configured to cause the imaging system to:
capture a first image of a first portion of the workpiece with the camera, wherein the first image defines a frame of reference;
determine a first plurality of measurements based at least in part on the first image of the first portion of the workpiece;
position a field of view of the camera with respect to a second portion of the workpiece with the actuator, wherein the second portion and the first portion comprise a plurality of common features, and wherein the second portion comprises at least one feature that is not included in the first portion;
capture a second image of the second portion of the workpiece;
determine a second plurality of measurements based at least in part on the image of the second portion of the workpiece, wherein the first and second pluralities of measurements correspond to dimensions of intersecting walls of the honeycomb body or of intersecting slots of the honeycomb extrusion die, wherein at least one of the first plurality of measurements is a first reference dimension defined by the common features, wherein at least one of the second plurality of measurements is a second reference dimension defined by the common features, wherein the first reference dimension is defined by a dimension between the common features based at least in part on the image of the first portion of the workpiece and the second reference dimension is defined by the same dimension between the common features based at least in part on the image of the second portion of the workpiece;
compare the first reference dimension to the second reference dimension to calculate a transformation;
apply the transformation to the second plurality of measurements to convert the second plurality of measurements into the frame of reference; and
combine the first plurality of measurements and the converted second plurality of measurements.