Table 1
Experimental results (mm).
| Workpiece number | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
|---|---|---|---|---|---|---|---|---|---|---|
| Image measuring instrument (truth value) | 54.841 | 54.861 | 54.840 | 54.800 | 54.096 | 54.011 | 54.142 | 54.075 | 54.063 | 54.098 |
| Proposed method (measurement) | 54.832 | 54.880 | 54.837 | 54.793 | 54.079 | 54.009 | 54.140 | 54.065 | 54.059 | 54.073 |
| Absolute error | −0.009 | 0.019 | −0.003 | −0.007 | −0.017 | −0.002 | −0.002 | −0.010 | −0.004 | −0.025 |
| Relative error (%) | −0.016 | 0.035 | −0.005 | −0.013 | −0.031 | −0.004 | −0.004 | −0.018 | −0.007 | −0.046 |
| Standard deviation (σs) | 0.0131 | |||||||||
Mean standard deviation  |
0.0041 | |||||||||
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