Method and device for a photogrammetric measurement

A method for photogrammetrically measuring measurement features with a device having a multi-camera, the multi-camera having at least two individual cameras securely connected to one another, with a field of view of at least two of the individual cameras at least partially overlapping, the method comprising:

• (a) recording images of the measurement features with at least two individual cameras of the multi-camera in different measurement positions;
• (b) evaluating the image recordings of a measurement position and, in three-dimensional space, determining three-dimensional (3-D) identification features of measurement features located within a region of overlap of the individual cameras with an aid of a plurality of image recordings for an overlap region and a respective pose of the measurement features in the plurality of image recordings, wherein the measurement features are uncoded markers that are not unambiguously identifiable based on their configuration, wherein the 3-D identification features are calculated between the measurement features, and wherein the measurement features in the measurement images are unambiguously identified based on the calculated 3-D identification features;
• (c) identifying the measurement features present in the plurality of image recordings with corresponding 3-D identification features recorded from various measurement positions;
• and
• (d) calculating the 3-D coordinates of the measurement features with the aid of the plurality of image recordings, wherein the 3-D coordinates are determined in a mathematical fitting using the 2-D image coordinates of the measurement features and their unambiguous identification.