Digital facial engraving

摘要

This contribution introduces the basic techniques for digital facial engraving; which imitaties traditioanl copperplate entraving; Inspired by traditional techniuqes,we first estalish a set of basic rules thanks to which separate engraving layers are built on the top of the original photo.Seprarate layers are merged according to simple merging rules and according to range shift/scale masks specially introduced for this purpose.We illustrate the introduced technique by a set of black/white and color engravings,showign different features such as engraving -specific image enhancements,mixing different regualr engraving lines with mezzoint,iorregular perturbations of engraving lines etc.