Contour Extraction of Watermarks in Old Manuscripts
Emanuel Wenger, В. Н. Карнаухов, Alois Haidinger · Eurographics · 1999
The comparison of watermarks in old paper is the major technique for dating undated medieval manuscripts. The extraction of watermarks as contours is the crucial task in digitalization and building a watermark database. In this paper the method of object delineation by active curves (snakes) is modified and applied to the contour tracing and skeletonization of watermarks.