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

Claim 8:
9. A three-dimensional geometry measurement method for measuring a three-dimensional geometry of an object to be measured on the basis of a captured image obtained by capturing an object to be measured, the three-dimensional geometry measurement method comprising the steps of:
creating 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 with a plurality of measurement systems corresponding to combinations of different optical devices among a plurality of optical devices;
creating 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;
calculating 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;
creating 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;
correcting 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
identifying a geometry of the object to be measured using the corrected target measurement data,
wherein parallax is a directional difference between optical axes of a plurality of optical devices included in the combinations of the optical devices.