US Patent 7587258 Merged laser and photogrammetry measurement using precise camera placement

The surface of a part is measured using a combination of laser tracking and Photogrammetry processes. Cameras used in the Photogrammetry process are mounted on a carriage for movement to positions along a predetermined path where images of the part surface are recorded and then converted to surface measurements. Laser tracking is used to both measure the part surface and track the position of the cameras. The measurements made by Photogrammetry and laser tracking processes are combined with the camera position to produce highly accurate part surface measurements.