BACKGROUND Retrieved metal-on-metal acetabular cups are valuable resources in investigating the wear behaviour of failed hip implants, but adequate methods to do so are lacking. To further contribute to addressing this issue, we developed a method to detect the in vivo location of the primary wear scar of an explanted cup. METHODS We proposed a new method in which thirteen patients with faile...

The availability of intuitive, user-friendly, and specialized software to work with 3D models of cultural heritage artefacts is as important as the availability of low-cost and robust data acquisition techniques for the adoption of digitized 3D models in cultural heritage research. The number of available high-quality digitized artefacts increases rapidly with the advent of low-cost 3D scanning...

We examine the usefulness of various imaging techniques, including optical ow, for measuring plant growth for corn seedlings and Caster Oil Bean leaves. A near-infrared camera, which allows one to measure optical ow in the light and in the dark, is used. For corn seedlings we have already used optical ow to obtain 3D image velocity as a measure of growth performance. We propose two new growth m...

Small distortions on the surface of sheet metal stamping parts may have significant impact on the optical appearance of the final product after finish treatment. Recently, there are considerable research activities in the development of optical methods for surface distortion measurement because of the fullfield and nondestructive nature of these methods. Optical methods such as Lights and Mirro...

In order to reduce the stress caused to patients by conventional methods of modeling using computed tomography (CT) or magnetic resonance imaging (MRI), an optical modeling process has been developed for extraoral defects and body areas. The selected body part is digitized using optical 3-coordinate measuring technology, providing an extensive data record. This is adapted for further use by equ...