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Table 2 Iterative noise reduction table for target bullseye fitting

From: Evaluation of new target structure and recognition for point cloud registration and coordinates transformation of China’s large double-span bridge

Iteration

\(x\)(m)

\(y\)(m)

\(z\)(m)

\(r\)(mm)

\(\mathrm{RMSE\delta }(\mathrm{mm})\)

Points

\({d}_{min}-r\)(mm)

\({d}_{max}-r\)(mm)

0

 − 2.1630

46.6644

 − 0.2361

95.6

1.2

194

-1.4

1.4

1

 − 2.1630

46.6645

 − 0.2361

95.6

1.0

177

-1.3

1.3

2

 − 2.1632

46.6643

 − 0.2361

95.6

0.8

154

-1.1

1.2

3

 − 2.1633

46.6642

 − 0.2360

95.6

0.7

134

-1.0

1.1