[Retracted] Recognition and Error Correction of Piano Playing Features Based on Filtering Technology

Table 1

Parameter table of least squares fitting method.

Smoothing points	5	7	9	11
	35.0	21.0	231.0	429.0
	17.0	7.0	59.0	89.0
	12.0	6.0	54.0	84.0
	−3.0	3.0	39.0	69.0
		−2.0	14.0	44.0
			−21.0	9.0
				−36.0