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AssigneeSnap-on Technologies, Inc.
InventorsDavid A. Jackson, Michael J. Robb, Donald L. Walchuk
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An apparatus and method for calibrating machine vision measuring systems that have more than one camera are disclosed. A first calibration target is mounted in a fixed relationship to a first camera of the machine vision measuring system. A third camera mounted in a fixed relationship to a second camera of the machine vision measuring system. Second and third calibration targets are mounted in a fixed relationship to one another and viewable by the first camera and by the third camera. A data processor is programmed to compute calibration of the first camera and the second camera, based on a position of the second calibration target relative to the third calibration target and based on a position of the first camera with respect to the third camera. The apparatus and method provide a way to continuously measure the positions of two or more cameras used in the measuring system, and to use such measurements to calibrate the system. If the cameras move with respect to each other, their respective positions are calculated and used in subsequent measurements. The apparatus and method enable a machine vision measuring system to be used without field calibration at the time of installation.
An apparatus for calibrating a machine measuring system that has a first measuring device and a second measuring device, the apparatus comprising:
An apparatus for calibrating a machine measuring system that has a first measuring device and a second measuring device, the apparatus comprising:
A measurement apparatus comprising:
A method for calibrating a machine measuring system that has a first measuring device and a second measuring device, the method comprising the steps of:
A method for calibrating a machine measuring system that has a first measuring device and a second measuring device, the method comprising the steps of:
A method for measuring the relative positions of a plurality of devices, the method comprising the steps of:
A computer-readable medium bearing instructions for calibrating a machine measuring system that has a first measuring device and a second measuring device adapted to be mounted in a predetermined spatial relationship to each other, a first calibration target adapted to be mounted in a predetermined spatial relationship to the first measuring device, and a third measuring device adapted to be mounted in a predetermined spatial relationship to the second measuring device, the computer-readable medium comprising instructions for performing the steps of:
A computer-readable medium bearing instructions for calibrating a machine measuring system that has a first measuring device and a second measuring device adapted to be mounted in a predetermined spatial relationship to each other, and a calibration device adapted to be mounted in a predetermined spatial relationship to at least the first measuring device for detecting change of position of the second measuring device relative to the first measuring device, the computer-readable medium comprising instructions for performing the steps of:
Dependencies are inferred from the claim text.