Facial expression transformation based on sketch image and multiscale edges
Yuanzhong Li, Hidefumi Kobatake · Electronics and Communications in Japan (Part III Fundamental Electronic Science) · 2001
Abstract This paper proposes a new method of transforming facial expression based on facial sketch image and multi‐scale edges. Multiscale edges, which are defined as local maxima of high‐frequency signal of facial images, are generally located on the edges of facial parts. Facial sketch images defined as line drawings of edges of facial parts are extracted by morphological processing, the generalized symmetry operator, the rectangle filter, and a geometrical template. Therefore, it is possible to transform the binary sketch image into gray‐tone multiscale edge images which are called characterized sketch images. The expression of the characterized facial image can be transformed easily based on FACS (Facial Action Coding System). By reconstruction based on Mallat's method of reconstruction of multiscale edges, facial images with different expressions can be obtained easily. © 2001 Scripta Technica, Electron Comm Jpn Pt 3, 84(9): 67–75, 2001