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Table 4 Comparison between the tracer particle and the matching point pairs

From: Three-Dimensional Reconstruction of Welding Pool Surface by Binocular Vision

Image group Tracer particles ( mm) Matching point pair 1 (mm) Matching point pair 2 (mm) Matching point pair 3 (mm) Maximum abs (error) (mm) Maximum relative error (%)
1 −1.31727 −1.36893 −1.33676 −1.33862 0.05136 3.92
2 −1.32219 −1.29371 −1.33483 −1.37148 0.05199 3.78
3 −1.19575 −1.23198 −1.23604 −1.12156 0.06419 5.37
4 −1.26499 −1.28316 −1.32741 −1.25829 0.06243 4.93
5 −1.17624 −1.16843 −1.21358 −1.16923 0.03736 3.17
6 −1.42836 −1.47268 −1.43864 −1.43269 0.04432 3.10
7 −1.27823 −1.29906 −1.24084 −1.24821 0.03748 2.93
8 −1.36529 −1.32842 −1.31868 −1.35937 0.04863 3.59