Patent ID: 8248476

Claim:
A method for calibrating a measurement system by determining interface parameters representative of an interface provided between the measurement system and a physical object to be measured, comprising: obtaining a first plurality of images of a calibration object, said first plurality of images obtained by the measurement system comprising two or more image capture devices that are provided in the same medium as the calibration object; obtaining a second plurality of images of the calibration object, the second plurality of images obtained while the measurement system is in a different medium than the calibration object, said different media being separated from one another by the interface, and said second plurality of images obtained by the two of more image capture devices while the calibration object is provided at a respective plurality of different locations and orientations relative to said interface; extracting and electronically storing data corresponding to measured positions of selected image points from the first and second pluralities of images of the calibration object; electronically calculating initial values of interface parameters from data corresponding to measured positions of selected image points from the first plurality of images; providing electronic definitions of modeled positions of image points based on said initial values of the interface parameters; and establishing and electronically storing an error function defined by the difference between modeled positions and measured positions of selected image points from the second plurality of images.