Patent ID: 8363927

Claim:
A method for precise optical detection of the 3D spatial shape of bodies or body parts by digital scanning, comprising the steps of: positioning a body to be scanned or a body part to be scanned on a surface of a base, said surface being marked with photogrammetric marks; applying photogrammetric marks in a partial area of the body or body part to be scanned; moving at least one triangulation arrangement around the body or body part to be scanned, the triangulation arrangement including at least one camera and at least one light pattern projector, the triangulation arrangement having internal and external parameters, the at least one camera capturing a sequence of images and the light pattern projector projecting a light pattern onto the body or body part, each captured image including an image field extending from the marked surface over non-marked areas of the body or body part; the photogrammetric marks being applied on at least one band fitted to the body or body part in a position spaced from said marked surface at a maximum possible distance and such that the photogrammetric marks are captured at least in the majority of captured images; and the image fields of successive captured images overlapping each other; evaluating the photogrammetric marks of the surface and the photogrammetric marks and the light pattern of the at least one light projector on the marked surface and on the photogrammetric marks in the partial area to determine the internal and external parameters of the at least one triangulation arrangement for each position in which an image was captured; and determining the 3D spatial shape of the body or body part by applying methods of photogrammetry using these parameters and by evaluating the position of the light pattern on the body or body part in the images taken by the at least one camera.