United States Patent: 7,039,216

Inventors: Shum; Heung-Yeung, Xu; Ying-Qing, Chen; Hong

发明人：沈向洋、徐迎庆、陈洪

Abstract: An example-based facial sketch system and process that automatically generates a sketch from an input image depicting a person's face. Sketch generation is accomplished by first training the system using example facial images and sketches of the depicted faces drawn with a particular style by a sketch artist. The trained system is then used to automatically generate a facial sketch that simulates the artist's style from an input image depicting a person's face. Nonparametric sampling and a flexible sketch model are employed to capture the complex statistical characteristics between an image and its sketch.