We present a group of methods for decomposing an arbitrary 3D volume rotation into a sequence of simple shear (i.e., regular shift) operations. We explore different types of shear operations: 2D beam shear, a shear in one coordinate based on the other two coordinates; 2D slice shear, a shear of a volume slice (in two coordinates) according to the third coordinate; and 2D slice–beam shear, the c...

This paper presents a strategy for reverse engineering that uses a coordinate measur ing machine to reconstruct three dimensional sculptured surfaces A rough initial model of the surface is generated manually An iterative method is then used to re ne the surface model until the error is within a desired bound The reverse engineering process is broken down into three phases data acquisition surf...

Rationale and Objectives. Accurate registration of Computed Tomography images to the patient is crucial for computer-assisted surgery. Markers used in Roentgen Stereogrammetric Analysis can be located in a CT scan using a novel approach, and can also be located physically. RSA data act as ”ground truth” for the 3D marker locations. Methods. Two foam-bone phantoms were marked. The markers were s...

This paper presents a method for 3D reconstructions of archaeological excavation sites. The method extends a 3D reconstruction algorithm for general rigid scenes to better fit the special archaeological needs and to integrate easily into the documentation process. As input, an ordered image sequence captured with a calibrated standard digital camera is required, along with a small set of 3D poi...

Surface roughness measurements are often required to validate a machining process. However, when using a 3D surface roughness measuring instruments it is usually necessary to remove the part from the machine tool between two operations, potentially introducing systematic errors. Furthermore, surface roughness measuring instruments are not suited for measuring heavy and large parts such as stamp...