Quantitative Canvas Weave Analysis Using 2-D Synchrosqueezed Transforms: Application of time-frequency analysis to art investigation

摘要: Quantitative canvas weave analysis has many applications in art investigations of paintings, including dating, forensics, and rollmate identification [1]?[3]. Traditionally, is based on X-radiographs. Prior to serving as a painting canvas, piece fabric coated with priming agent; smoothing its surface makes this layer thicker between thinner right top threads. These variations affect the X-ray absorption, making pattern stand out images finished painting. To characterize pattern, it customary visually inspect small areas within X-radiograph count number horizontal vertical threads; averages these then estimate overall density. The tedium process typically limits practice just few sample regions canvas. In addition, does not capture more subtle information beyond density, such thread angles or pattern. Signal processing techniques applied investigation are now increasingly used develop computer-assisted tools.