Updating calibration of a three-dimensional measurement system
AssigneeCyberOptics Corporation
InventorsGuangyu Zhou, Eric P. Rudd, Carl E. Haugan
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Abstract
A method of calibrating a three-dimensional measurement system having a plurality of cameras and at least one projector is provided. The method includes performing a full calibration for each camera/projector pair where the full calibration generates at least two sets of correction matrices. Subsequently, an updated calibration is performed for each camera/projector pair. The updated calibration changes less than all of the sets of correction matrices.
Claims20
A method of calibrating a three-dimensional measurement system having a plurality of cameras and at least one projector, the method comprising:
- performing a full calibration for each camera/projector pair, the full calibration generating at least two sets of correction matrices;
- subsequently performing an updated calibration for each camera/projector pair, wherein the updated calibration changes less than all of the sets of correction matrices;
- and
- wherein the full calibration generates a first set of correction matrices and a second set of correction matrices, and wherein the updated calibration changes the first set of correction matrices while leaving the second set of correction matrices unchanged.
A method of calibrating a three-dimensional measurement system having a plurality of projectors and at least one camera, the method comprising:
- performing a full calibration for each camera/projector pair, the full calibration having at least two sets of correction matrices;
- subsequently performing an updated calibration for each camera/projector pair, wherein the updated calibration changes less than all of the sets of correction matrices;
- and
- wherein performing a full calibration includes performing a projector calibration where a pattern is projected onto a target and each camera acquires images of the protected pattern as the target is positioned at a plurality of different heights.
A three-dimensional optical image acquisition system comprising:
- a plurality of cameras each configured to view a measurement space from a different point of view;
- at least one projector configured to project a pattern onto the measurement space;
- a controller configured to perform a full calibration of the plurality of cameras and the at least one projector to generate a first set of correction matrices and a second set of correction matrices;
- and
- wherein the controller is configured to perform a calibration update, conducted after the full calibration, wherein the calibration update is conducted relative to each camera/projector pair, and wherein the calibration update affects the first set of correction matrices while leaving the second set of correction matrices unchanged.
A three-dimensional optical image acquisition system comprising:
- a plurality of cameras each configured to view a measurement space from a different point of view;
- at least one projector configured to project a pattern onto the measurement space;
- a controller configured to perform a full calibration of the plurality of cameras and the at least one projector to generate at least a first set of correction matrices and a second set of correction matrices;
- wherein the controller is configured to perform a calibration update relative to each camera/projector pair, wherein the calibration update affects the first set of correction matrices while leaving the second set of correction values unchanged;
- and
- wherein performing the full calibration includes performing a projector calibration where a pattern is projected onto a target and each camera acquires images of the projected pattern as the target is positioned at a plurality of different heights.
Dependencies are inferred from the claim text.