Hyperspectral Indices for Identification of Red Pigments Used in Cultural Relic

De-hui LI; Tai-xia WU; Shu-dong WANG; Zhe-hua LI; Yi-wei TIAN; Xiao-long FEI; Yang LIU; Yong LEI; Guang-hua LI

doi:10.3964/j.issn.1000-0593(2022)05-1588-07

Spectroscopy and Spectral Analysis, Volume. 42, Issue 5, 1588(2022)

Hyperspectral Indices for Identification of Red Pigments Used in Cultural Relic

De-hui LI1,*... Tai-xia WU1,1; *;, Shu-dong WANG2,2; *;, Zhe-hua LI1,1;, Yi-wei TIAN1,1;, Xiao-long FEI1,1;, Yang LIU1,1;, Yong LEI3,3; and Guang-hua LI3,3; |Show fewer author(s)

Author Affiliations

¹1. School of Earth Sciences and Engineering, Hohai University, Nanjing 211100, China

²2. Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China

³3. The Palace Museum, Beijing 100009, China

show less

Abstract Get PDF(in Chinese)

Figures & Tables(10)

Fig. 1. Spectral curves of 10 kinds of red pigments

Download full size

View in Article

Fig. 2. Differential reflectivity spectral curves based on cinnabar Ⅰ as a target pigment

Download full size

View in Article

Fig. 3. Differential reflectivity spectral curves after removing curves of pigments clearly distinguished from cinnabar Ⅰ

Download full size

View in Article

Fig. 4. Discrimination of 10 kinds of red pigments

Download full size

View in Article

Fig. 5. The selected feature wavelengths and 10 spectral curves of red pigments

Download full size

View in Article

Fig. 6. Cinnabar pigment extracted by using VNIR-SWIR imaging spectral data
(a): Part of the ancient painting; (b): Cinnabar pigment white areas extracted by CNDSI; (c): Iron oxide red pigment (white areas) extracted by INDSI; (Both have been verified by chemical analysis)

Download full size

View in Article

Table 1. The main chemical compositions of 10 kinds of red pigments used in this study

View table

View in Article

Table 1. The main chemical compositions of 10 kinds of red pigments used in this study

序号	颜料	主要化学成分
1	辰砂	HgS (纯度为98%)
2	胭脂	Mg₃(Si₄O₁₀)(OH)₂, ZnO
3	银朱	HgS (Hg:S=5:1)
4	朱膘	HgS (颗粒直径略小于朱砂矿Cinnabar Ⅱ)
5	朱砂	HgS (纯度为93%)
6	赭石	Fe₂O₃ (富含Fe₂O₃的块状铁矿石)
7	赭粉	Fe₂O₃ (赭石粉末)
8	铁红	Fe₂O₃ (纯净化合物)
9	土红	Fe₂O₃, Al₂O₃
10	西洋红	Br(CO₃)₂

Table 2. Calculation results of 6 spectral indices of cinnabar Ⅰ
View table
View in Article
Table 2. Calculation results of 6 spectral indices of cinnabar Ⅰ
指数 A B C
CNDSI₁ 0.222 8 0.590 4 1.678 7
CNDSI₂ 0.229 7 0.560 4 1.590 3
CNDSI₃ 0.046 4 0.123 9 0.920 6
CNDSI₄ 0.007 3 0.012 2 1.538 9
CNDSI₅ 0.178 2 0.709 6 1.963 0
CNDSI₆ 0.185 2 0.667 7 1.844 3

Table 3. Calculation results of CNDSI for 10 kinds of red pigments

View table

View in Article

Table 3. Calculation results of CNDSI for 10 kinds of red pigments

序号	种类	指数值	区分度
1	辰砂	0.178 2	0.000 0
2	胭脂	0.764 8	5.293 0
3	银朱	0.051 7	0.709 6
4	朱膘	0.089 4	1.501 6
5	朱砂	0.014 3	0.919 9
6	赭石	0.180 4	2.012 4
7	赭粉	0.040 4	1.227 0
8	铁红	0.006 0	0.966 2
9	土红	0.189 8	2.065 2
10	西洋红	0.351 3	2.972 0

Table 4. Spectral characteristic indices, index values and the minimum discrimination of 10 kinds of red pigments

View table

View in Article

Table 4. Spectral characteristic indices, index values and the minimum discrimination of 10 kinds of red pigments

颜料种类	光谱特征指数	指数值	最小区分度
辰砂	CNDSI= $\frac{1}{2} (\frac{R_{2381} - R_{1256}}{R_{2381} + R_{1256}})$	0.178 2	0.709 6
胭脂	RNDSI= $\frac{1}{2} (\frac{R_{2054} - R_{2280}}{R_{2054} + R_{2280}})$	0.239 5	0.724 2
银朱	VNDSI= $\frac{1}{2} (\frac{R_{981} - R_{2241}}{R_{981} + R_{2241}})$	0.048 3	0.934 3
朱膘	ZNDSI= $\frac{1}{2} (\frac{R_{2046} - R_{2397}}{R_{2046} + R_{2397}})$	0.028 9	1.157 9
朱砂	CnNDSI= $\frac{1}{2} (\frac{R_{923} - R_{1249}}{R_{923} + R_{1249}})$	0.005 7	1.541 8
赭石	ONDSI= $\frac{1}{2} (\frac{R_{1767} - R_{2130}}{R_{1767} + R_{2130}})$	0.007 5	4.065 8
赭粉	PNDSI= $\frac{1}{2} (\frac{R_{1001} - R_{2135}}{R_{1001} + R_{2135}})$	0.004 3	3.864 7
铁红	INDSI= $\frac{1}{2} (\frac{R_{1694} - R_{2400}}{R_{1694} + R_{2400}})$	0.010 8	1.070 5
土红	TNDSI= $\frac{1}{2} (\frac{R_{1264} - R_{1596}}{R_{1264} + R_{1596}})$	0.001 3	2.991 2
西洋红	WNDSI= $\frac{1}{2} (\frac{R_{968} - R_{1091}}{R_{968} + R_{1091}})$	0.001 9	1.468 5

Tools

Get Citation

Copy Citation Text

De-hui LI, Tai-xia WU, Shu-dong WANG, Zhe-hua LI, Yi-wei TIAN, Xiao-long FEI, Yang LIU, Yong LEI, Guang-hua LI. Hyperspectral Indices for Identification of Red Pigments Used in Cultural Relic[J]. Spectroscopy and Spectral Analysis, 2022, 42(5): 1588

Download Citation

EndNote(RIS)BibTex Plain Text

Set citation alerts for article

Save article for my favorites