Melada Jacopo, Gargano Marco, Ludwig Nicola
Appl Opt. 2022 Mar 10;61(8):E33-E38. doi: 10.1364/AO.445047.
Reflectographic analyses applied on paintings can be performed using cameras equipped with different detectors with different abilities in detecting and visualizing underdrawings, repainting, restorations, and other nonvisible information. In this research, the results obtained through thermographic imaging followed by statistical imaging postprocessing methods have been compared with those obtained with traditional reflectographic methods in the short-wave infrared range. The comparison has been performed studying the thermal sequence after a single pulse of light with a different spectrum of ad hoc mock-ups. Results showed that for limited cases, signal-to-noise ratio seems to be more relevant in obtaining reliable images of underdrawings with respect to the effect of optical absorption of visible light by painting layers.
应用于绘画的反射成像分析可以使用配备不同探测器的相机来进行，这些探测器在检测和可视化底稿、重绘、修复及其他不可见信息方面具有不同能力。在本研究中，将通过热成像及统计成像后处理方法获得的结果与在短波红外范围内使用传统反射成像方法获得的结果进行了比较。比较是通过研究针对具有不同光谱的特制模型单次光脉冲后的热序列来进行的。结果表明，在有限的情况下，相对于绘画层对可见光的光吸收效应，信噪比在获取底稿可靠图像方面似乎更为重要。
