Table 1.

Measurement parameters of several filters.

Filter	Noise Elimination Rate	Time Complexity	$\mathit{\sigma }$	${\mathit{\sigma }}_{\overline{\mathit{x}}}$	$\mathit{R}$
SOR filter	53.81%	$O(3n^2)$	0.0592	0.0472	0.4868
VGSOR filter	87.33%	$O(5n^2)$	0.0848	0.0656	0.8276
ROR filter	49.31%	$O(n)$	0.0759	0.0553	0.6862
Gaussian filter	36.25%	$O(n^2)$	0.1005	0.0772	0.7860
DON filter	80.97%	$O(2n^2)$	0.1726	0.1192	1.3672
GPCA method	98.03%	$O(n^2)$	0.0674	0.0523	0.5790