HIGH-ACCURACY CALIBRATION SYSTEM AND METHOD

摘要

This invention provides a calibration target with a calibration pattern on at least one surface. The relationship of locations of calibration features on the pattern are determined for the calibration target and stored for use during a calibration procedure by a calibrating vision system. Knowledge of the calibration target's feature relationships allow the calibrating vision to image the calibration target in a single pose and rediscover each of the calibration features in a predetermined coordinate space. The calibrating vision can then transform the relationships between features from the stored data into the calibrating vision system's local coordinate space. The locations can be encoded in a barcode that is applied to the target, provided in a separate encoded element, or obtained from an electronic data source. The target can include encoded information within the pattern defining a location of adjacent calibration features with respect to the overall geometry of the target.