素描画的高光谱成像与分析

摘要：光谱分析是一种适用于绘画研究的实用分析技术，尤其是高光谱成像技术，以其无损、非接触、快速成像、高光 谱分辨率等特点，逐渐成为绘画文物科学分析的热点研究课题，主要用于提取绘画中肉眼难以观察到的内在信息。本研 究以两幅看似相同的素描画为样本，一幅用2B铅笔绘制，另一幅用4B铅笔绘制。利用地面高光谱成像仪获取两幅素描 画在 390nm–1025nm范围内的高光谱数据立方体，并对两幅画的光谱特征进行分析比较。结果表明，高光谱成像极大地 方便了获取绘画中不同材质的诊断光谱特征，通过高光谱分析可以有效地识别画作中的特定目标，对画作鉴定有很大帮 助。同时，可以提取画作的直流特征和细节特征，有助于研究者分析画作的风格，进一步证明了高光谱成像在绘画文物 保护与保存中具有重要的科学价值和实用价值。

关键词：素描画 科学分析 高光谱成像 光谱特征 绘画风格

期刊：Optik - International Journal for Light and Electron Optics

DOI：https://DOI.org/10.1016/j.ijleo.2020.164686

设备：GaiaField

Hyperspectral imaging and analysis for sketch painting

Abstract：Spectral analysis is a practical analytical technique suitable for the study of painting. Especially hyperspectral imaging has gradually become a hot research topic in the scientific analysis of painting relics, due to its characteristics such as non-invasive, non-contact, fast imaging and high spectral resolution. It is mainly used to extract the intrinsic information that is difficult to observe in painting with naked eyes. In this study, two seemingly identical sketch paintings served as samples, one was painted with a 2B pencil, the other with a 4B pencil. A ground-based hyper spectral imager was used to obtain the hyperspectral data cube for the two sketch paintings in the range of 390 nm–1025 nm. And the two paintings were analyzed and compared in terms of spectral characteristics. Results indicated that hyperspectral imaging greatly facilitates the ac quisition of the diagnostic spectral characteristics of different materials in painting. And the specific target in paintings can be effectively identified through hyperspectral analysis, which is of great help to painting identification. At the same time, DC characteristics and detail char acteristics of the painting can be extracted, which are helpful for the researchers to analyze the painting style. In brief, it is further proved that the hyperspectral imaging has significant sci entific and practical value in the protection and preservation of painting relics.

Keywords：Sketch painting Scientific analysis Hyperspectral imaging Spectral characteristic Painting style