Application of Image Enhancement in X-Ray Photography of Cultural Relics

Jiankai Xiang; Meng Wu; Zhan Wang; Gang Zhen; Linyan Ma

doi:10.3788/LOP56.063402

Journals >Laser & Optoelectronics Progress >Volume 56 >Issue 6 >Page 063402 > Article

Laser & Optoelectronics Progress
Vol. 56, Issue 6, 063402 (2019)

Application of Image Enhancement in X-Ray Photography of Cultural Relics

Jiankai Xiang^1、2、*, Meng Wu³, Zhan Wang^1、2, Gang Zhen^1、2, and Linyan Ma^1、2

Author Affiliations

¹ Key Scientific Research Base on the Conservation of Stone and Brick Materials, State Administration of Cultural Heritage of China, Xi'an, Shaanxi 710075, China

² Shaanxi Provincial Institute of Cultural Relics Protection, Xi'an, Shaanxi 710075, China

³ School of Information and Control Engineering, Xi'an University of Architecture and Technology, Xi'an, Shaanxi 710055, China

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DOI: 10.3788/LOP56.063402 Cite this Article Set citation alerts

Jiankai Xiang, Meng Wu, Zhan Wang, Gang Zhen, Linyan Ma. Application of Image Enhancement in X-Ray Photography of Cultural Relics[J]. Laser & Optoelectronics Progress, 2019, 56(6): 063402 Copy Citation Text

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X-ray image enhancement process of bronze mirror. (a) Original image; (b) result of high-frequency emphasis filtering (D0=200); (c) result of adaptive performing histogram on (b) (D0=200); (d) result of image enhancement (D0=500)

Fig. 1. X-ray image enhancement process of bronze mirror. (a) Original image; (b) result of high-frequency emphasis filtering (D0=200); (c) result of adaptive performing histogram on (b) (D0=200); (d) result of image enhancement (D0=500)

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Fig. 2. X-ray images of ceramic shard before and after image enhancement. (a) Original image; (b) enhanced image

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Fig. 3. X-ray images of clay sculpture (shoulder) before and after image enhancement. (a) Original image; (b) enhanced image

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Fig. 4. Enhancement results of bronze mirror by different algorithms. (a) Histogram equalization; (b) Laplace filter

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X-ray image	Bronzemirror	Ceramicshard	Claysculpture
Original image	0.1577	0.1223	0.0788
Enhanced image	0.6619	1.5854	0.8560

Table 1. GMG values of X-ray images before and after enhancement

X-ray image	Bronzemirror	Ceramicshard	Claysculpture
Original image	10.7022	6.2308	6.9654
Enhanced image	11.9847	10.6347	12.9535

Table 2. IE values of X-ray images before and after image enhancement

Parameter	Originalimage	Histogramequalization	Laplacefilter	Proposedalgorithm
GMG	0.1577	0.2133	0.5734	0.6619
IE /(bit·pixel^-1)	10.7022	4.8537	11.4496	11.9847

Table 3. Comparison of image enhancement effects by three enhancement algorithms

Jiankai Xiang, Meng Wu, Zhan Wang, Gang Zhen, Linyan Ma. Application of Image Enhancement in X-Ray Photography of Cultural Relics[J]. Laser & Optoelectronics Progress, 2019, 56(6): 063402

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