Abstract
When using X-ray computed tomography in coordinate metrology, methods for the determination of surface points at subvoxel accuracy (hereinafter subvoxeling) are essential. In recent years, the demand to measure objects consisting of several materials has increased. While subvoxeling edge detection operators proven for mono-material applications are rarely suitable for multi-material specimens, a number of algorithms enable segmentation at voxel resolution. To overcome the gap, a new method has been developed. In a first step, volumes of material probabilities are calculated using a (pre-)segmentation while obtaining the implicitly given subvoxel-accurate information. The surface points can then be calculated using common edge detection operators. Initial results of the validation based on selected examples are presented.
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