Use of infrared hyperspectral imaging (960–1680 nm) and low energy x-radiography to visualize watermarks
Use of infrared hyperspectral imaging (960–1680 nm) and low energy x-radiography to visualize watermarks
复制标题
使用红外高光谱成像 (960–1680 nm) 和低能 X 射线照相术来可视化水印
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
M. Loew
中科院分区：
文献类型：
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作者：
J. Delaney;M. Loew
本文提出了使用近红外（900至1700 nm）透射光成像与高光谱相机，以获得水印的印刷品。具体而言，我们表明，应用于近红外收集的高光谱图像立方体的主成分分析能够将水印从1662年的Blaue Atlas Maior页面两侧的炭黑墨水中印刷的文本中分离出来。将得到的水印的主成分图像与使用低能量X射线源和荧光板获得的图像进行比较。低能量x射线照相术正在取代β射线照相术，成为水印成像的黄金标准。通过透射近红外高光谱成像获得的水印被发现具有由荧光板射线照相术揭示的水印的许多关键特征。本文提出的方法为从纸上艺术品中提取水印提供了一种新的途径。
This paper proposes the use of near infrared (900 to 1700 nm) transmitted light imaging with a hyperspectral camera to obtain watermarks from prints. Specifically, we show that principal component analysis applied to the hyperspectral image cube collected in the near infrared was able to separate the watermark from text printed in carbon black ink on both sides of a page from the Blaue Atlas Maior of 1662. The resulting principal component image of the watermark was compared with an image obtained using a low-energy x-ray source and a phosphor plate. Low-energy x-radiography is becoming the gold standard for imaging watermarks, replacing beta radiography. The watermark obtained by transmitted near infrared hyperspectral imaging was found to possess many of the key features of the watermark revealed by the phosphor plate radiography. The method proposed here offers an additional way to extract watermarks from works of art on paper.