Abstract: The invention relates to a method and to an image recording device (1) for determining a geometric measurement quantity (3) of an object (2), wherein at least one visual image (4) of the object (2) is recorded in a recording step, a true-to-scale 3-D image of the object (2) is recorded and/or calculated in a 3-D image creation step, a subset of 3-D points of the 3-D image is calculated in a point cloud calculation step, a geometric primitive is fit to the subset of 3-D points using a computer in a fitting step, a feature selection is applied to the at least one visual image in a feature detection step in order to identify at least two feature points (9, 10) in the visual image (4), the at least two feature points (9, 10) are projected onto the geometric primitive as at least two measurement points (12, 13) in a projection step (11), and a geometric measurement quantity (3) is calculated for the at least two measurement points (12, 13) in a calculation step.