PSI - Issue 75

Jörg Baumgartner et al. / Procedia Structural Integrity 75 (2025) 120–128 Jo¨rg Baumgartner / Structural Integrity Procedia 00 (2025) 000–000

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b) Derived feature lines

a) 3D-curvature

Fig. 5: a) Areas with high curvature mark the areas of weld toes in a 3D-evaluation and b) extracted feature lines

b) Clusters with small distance to surface

a) 3D-curvature

irregularities close to weld

RANSAC surface

Fig. 6: Application of combined RANSAC and curvature approach to identify weld line at a warp-around weld. a) Areas with high curvature and RANSAC surface b) identified clusters

Annotated by 3D-curvature

Prediction PointNet++

Manual adjustment needed

Overall Prediction accurency 91.03%

Fig. 7: Comparison of annotated point clouds base on 3D-curvature method and prediction by PointNet ++