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arXiv · 2105.02651

Technical Report: Virtual X-ray imaging for higher-order finite element results

Maximilian Bittens
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Abstract

This work describes and demonstrates the operation of a virtual X-ray algorithm operating on finite-element post-processing results which allows for higher polynomial orders in geometry representation as well as density distribution. A nested hierarchy of oriented bounding boxes is used for preselecting candidate elements undergoing a ray-casting procedure. The exact intersection points of the ray with the finite element are not computed, instead the ray is discretized by a sequence of points. The element-local coordinates of each discretized point are determined using a local Newton-iteration and the resulting densities are accumulated. This procedure results in highly accurate virtual X-ray images of finite element models.

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Maximilian Bittens. 2021-05-06. Technical Report: Virtual X-ray imaging for higher-order finite element results. https://arxiv.org/abs/2105.02651

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