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Table 13 RMSD of positional errors of the proposed detector for the sparsely sampled ideal slopes

From: A one-dimensional slope detection approach

Pre-smooth

Erf

Tanh

Sigmoid

Ramp

Step

Arctan

0

0.1004

0.0615

0.2323

0.2547

-

0.0692

1

0.0946

0.0484

0.2421

0.2353

0.3519

0.0665

4

0.3529

0.2818

0.7248

0.2840

0.2932

0.4723