[1] Xiang J K, Zhang G, Dong S H et al. Application of digital radiography to the research on wood carving[J]. Sciences of Conservation and Archaeology, 30, 103-108(2018).

[2] Hu D B, Lü S X. Application of X-ray photography in the research of the bronzes unearthed from the Jin marquis cemetery[J]. Ancient Civilizations, 9, 55-81(2013).

[3] Xie J, Yan W X[J]. Application and prospect of X-ray imaging technology in conservation of unearthed bronzes World of Antiquity, 2016, 74-77.

[4] Hu D B[M]. The X-ray imaging of cultural relics, 55-161(2012).

[5] Yang J C, Han R B. The application of X-rays photography in the study of cultural relics and archaeology[J]. Sciences of Conservation & Archaeology, 13, 55-60(2001).

[6] Ding Z M, Wu L M, Kong F G. X-ray radiography in scientific conservation[J]. Sciences of Conservation and Archaeology, 18, 38-46(2006).

[7] Zhou H, Yang M, Gao F et al. Application of portable X-ray radiography to assess the weathering condition of the Avalokitesvara sculpture in Dazu Rock Carvings[J]. Sciences of Conservation and Archaeology, 24, 45-54(2012).

[8] Zhou H, Yang M, Gao F et al[J]. Latest progress in non-destructive ray radiography detection in archaeological sites Dunhuang Research, 2013, 35-43.

[9] He W. Medical X-ray image enhancement algorithm based on the high frequency emphasis filtering[J]. Information Technology, 39, 60-62, 66(2015).

[10] Wu S B, Wang Y, Xie Y Q. Contrast enhancement of medical X-ray images based on multiscale limited adaptive histogram equalization and mathematical morphology[J]. Journal of Integration Technology, 3, 38-45(2014).

[11] Gonzalez R C, Gonzalez R C, Woods R E, Woods R E, Eddins S L, Eddins S L[M]. 数字图像处理的MATLAB实现, 25-122(2013).

     [M]. Digital image processing using MATLAB, 25-122(2013).

[12] Xiong J, Han L N, Geng G H et al. Digital medical image enhanced by similar method of Retinex[J]. Computer Engineering and Applications, 45, 14-16, 20(2009).

[13] Zhou F, Jia Z H, Yang J et al. Medical image enhancement method based on improved Gamma correction in shearlet domain[J]. Journal of Optoelectronics·Laser, 28, 566-572(2017).

[14] Song L, Feng Y P, Wei Y B. Gray level DAG maximum entropy based on quantization resolution for medical image tone enhancement[J]. Journal of Sichuan University (Natural Science Edition), 55, 316-322(2018).