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Table 7 RMSD of positional errors of the proposed method, pre-smoothing scale 0

From: A one-dimensional slope detection approach

Error	Erf	Tanh	Sigmoid	Ramp	Step	Arctan
Position (point)	0.0097	0.0140	0.1107	0.2065	0.3527	0.0062
Width (%)	1.1900	2.0600	19.2500	6.9900	0.9900	1.3400
Contrast (%)	2.6300	7.2600	9.0000	16.4400	7.4300	24.8700
Offset (%)	3.7300	10.3800	12.7100	23.4800	22.9800	35.7400

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