Patent ID: 11948321
Assignee: MITUTOYO CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A three-dimensional geometry measurement apparatus for measuring a three-dimensional geometry of an object to be measured on the basis of a captured image obtained by capturing the object to be measured, the three-dimensional geometry measurement apparatus comprising:
a plurality of optical devices;
a preliminary measurement part that creates a plurality of pieces of preliminary measurement data indicating three-dimensional coordinates of a reference point on a reference instrument by capturing the reference instrument in a plurality of measurement systems corresponding to combinations of different optical devices among the plurality of optical devices;
a reference data creation part that creates reference data on the basis of one or more of the plurality of pieces of preliminary measurement data;
a calculation part that calculates a correction value on the basis of the reference data and the preliminary measurement data which does not match the reference data among the plurality of pieces of preliminary measurement data;
a target measuring part that creates a plurality of pieces of target measurement data indicating results of measuring a measurement point of the object to be measured with the plurality of measurement systems;
a correction part that corrects the target measurement data in the measurement system corresponding to the preliminary measurement data that does not match the reference data on the basis of the correction value; and
a geometry identification part that identifies a geometry of the object to be measured using the corrected target measurement data corrected with the correction part,
wherein parallax is a directional difference between optical axes of a plurality of optical devices included in the combinations of the optical devices, and
wherein the reference data creation part creates one piece of the reference data for each of a plurality of reference points on the reference instrument by selecting for each reference point, from among a plurality of pieces of the preliminary measurement data corresponding to the plurality of measurement systems, the preliminary measurement data corresponding to a combination of the optical devices having a largest parallax with respect to the reference point.