Computational Watermark Enhancement in Leonardo’s Codex Leicester

Computational Watermark Enhancement in Leonardo’s Codex Leicester
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达·芬奇莱斯特抄本中的计算水印增强

DOI:
10.1080/01971360.2019.1703483
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发表时间:
2020
影响因子:
0.5
通讯作者:
Johnson, C. Richard
Johnson, C. Richard
中科院分区:
--
文献类型:
--
作者:
Sethares, William A.;Ellis, Margaret Holben;Johnson, C. Richard

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更好地了解列奥纳多达芬奇(1452-1519)手稿的内部结构特征(水印和链线/线间隔)可以提供有关年表,地理起源和工作室实践的有价值的信息。然而,为了得到有效的结论,需要清楚地表示水印和链线/线。虽然捕捉纸张这些独特物理特性的最简单方法是通过透射光,但当纸张正面(正面/正面)和反面(背面/反面)上的书写和其他表面标记使它们模糊时,它们可能很难破译。使用列奥纳多的《莱斯特法典》(比尔盖茨收藏)(大约1508-1510年编辑)作为案例研究,设计了一种计算方法,通过从透射光图像中减去正面和反面的漫反射(正常)光图像,来最大限度地减少表面书写,以增强纸张中可检测到的水印和链线/线。这是通过将问题作为数学优化问题来实现的,并且求解最优权重是快速和鲁棒的。
A better understanding of the inner structural features (watermarks and chain line/wire intervals) of the manuscript papers of Leonardo da Vinci (1452–1519) can provide valuable information regarding chronology, geographic origins, and studio practise. For valid conclusions, however, clear representations of watermarks and chain lines/wires are required. While the easiest way to capture these unique physical characteristics of paper is via transmitted light, they can be difficult to decipher when writing and other surface marks found on the recto (front/obverse) and the verso (back/reverse) of the sheet obscure them. Using Leonardo'sCodex Leicester(Bill Gates Collection), compiled circa 1508–1510, as a case study, a computational approach was designed to minimize surface writing to enhance the watermarks and chain lines/wires detectable in the paper, by subtracting out diffuse specular (normal) light images of the recto and the verso sides from the transmitted light image. This is accomplished by posing the problem as a mathematical optimization problem, and solving for the optimal weights is fast and robust.
比较 X 射线和背光成像的纸张结构可视化
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通过抑制遮挡文本或图形来实现水印的可见传输成像
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发表时间: 2019
影响因子: --
作者:
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