Abstract: A method for determining an exposure, in particular an exposure time, for a recording in a method for determining the 3D coordinates of an object is provided, in which a pattern is projected onto the object and the light reflected by the object is recorded. To improve such a method, a recording of the object is produced with a predetermined exposure, in particular exposure time. A mask image of this recording is produced, in which mask image the regions of the object lying within the measurement volume are depicted. The exposure, in particular the exposure time, for the recording is determined depending on the predetermined exposure, in particular exposure time, depending on the mean greyscale value in the regions, lying within the measurement volume, of the recording with a predetermined exposure and depending on an ideal greyscale value.

Abstract: In a method for determining the 3D coordinates of an object a pattern (6) is projected onto the object (1) by a projector (3), the light reflected by the object (1) is captured by a camera (4), and the shots recorded by the camera (4) are evaluated. Reference marks (8) on and/or beside the object (1) are recorded by a reference camera (5). The reference camera (5) has a larger field of view (9) than the camera (4). To improve such method, the reference camera (5) is connected with the camera (4) or with a 3D sensor (2) which comprises the projector (3) and the camera (4).

Abstract: A method for determining an exposure, in particular an exposure time, for a recording in a method for determining the 3D coordinates of an object is provided, in which a pattern is projected onto the object and the light reflected by the object is recorded. To improve such a method, a recording of the object is produced with a predetermined exposure, in particular exposure time. A mask image of this recording is produced, in which mask image the regions of the object lying within the measurement volume are depicted. The exposure, in particular the exposure time, for the recording is determined depending on the predetermined exposure, in particular exposure time, depending on the mean greyscale value in the regions, lying within the measurement volume, of the recording with a predetermined exposure and depending on an ideal greyscale value.

Abstract: The invention relates to a method for determining the 3D profile of an object. In order to improve a method of this type, several sections of the object (5) are measured. During at least one measuring operation, at least one reference object (4) is measured. The measured sections of the object (5) are combined (1).

Abstract: A method is used to calibrate a 3D measuring device (1). In order to calibrate any 3D measuring device (1) without specific manufacturer's know-how, one or more characterizing objects (15, 16, 17) of a reference object (14) are measured at one or more positions in measurement volume (12) of 3D measuring device (1) to be calibrated. A gauge of the measurement error is calculated from the measured values as a function of the position in measurement volume (12). From that, an error correction function is calculated (FIG. 3).

Abstract: The invention relates to a method for determining the 3D profile of an object. In order to improve a method of this type, several sections of the object (5) are measured. During at least one measuring operation, at least one reference object (4) is measured. The measured sections of the object (5) are combined (1).