Table 3 Accuracy of spectral recognition algorithm under different noise and different algorithm

From: Digital restoration of mural paintings from late Tang tomb M1373 in Xi’an based on hyperspectral analysis and image interaction processing

Accuracy rate

Case1

Case2

Case3

Case4

Case5

Case6

Case7

Case8

Additive noise on entire value in formula (1)

0.07

0.06

0.05

0.05

0.05

0.05

0.05

0.04

Multiplicative noise on a,b in formula (1)

0.05

0.05

0.05

0.04

0.03

0.02

0.01

0.01

Mixed operator

85.37%

92.25%

96.78%

97.23%

97.29%

97.75%

97.73%

100%

SAM operator

85.26%

92.12%

96.63%

97.07%

97.11%

97.75%

97.70%

100%

SID operator

83.75%

91.15%

95.36%

95.62%

96.42%

96.64%

96.50%

100%

  1. Bold indicates the optimalvalue in the current comparison group.