Patent ID: 8520067

Claim:
A method for calibrating a measuring system ( 1 ) based on at least one camera ( 4 ) for determining the position of an object ( 2 ) in a reference three-dimensional coordinate system ( 3 ), in which the external and internal parameters of the camera are calibrated in various steps, the method comprising at least three steps: in a first method step, the internal camera parameters of a certain camera ( 4 ) are ascertained and fixedly assigned to this camera ( 4 ) before the camera ( 4 ) is installed in the measuring system ( 1 ); in a second method step, using the assigned internal camera ( 4 ) parameters, the position ( 6 ) of the camera ( 4 ) mounted in the measuring system ( 1 ) is determined with the aid of external measuring means by measuring a recorded camera point located in a known relation to the camera ( 4 ), and in a third method step, using the determined position ( 6 ) of the camera ( 4 ), ascertaining an orientation ( 7 ) of the camera ( 4 ) in the reference three-dimensional coordinate system ( 3 ) by evaluating camera images, including recording two or more features ( 10 ) of the object ( 2 ) in one camera image, wherein positions of the two or more features ( 10 ) in the reference coordinate system ( 3 ) are known; wherein the steps are executed in sequential order and non-iteratively.