Heritage Science

Table 7 Component evaluation results

From: Quantitative analysis of mixed pigments for Chinese paintings using the improved method of ratio spectra derivative spectrophotometry based on mode

	NMF 1	NMF 2	ICA 1	ICA 2
Correlation coefficient
Ocher	0.9590	0.5098	0.51066	0.8224
Lead powder	0.7102	0.9642	− 0.3971	0.9015
RMSE
Ocher	0.0112	0.3967	0.2251	0.0925
Lead powder	0.0365	0.0234	0.0691	0.0506

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