Generating and rendering expressive caricatures

Facial caricature drawing exaggerates physical face features for a comical effect, and can create an entertaining, humorous, and cartoon-like description of a person's face. Recently, example-based approaches have been introduced to generate facial sketches. Most of these approaches exaggerate the caricature appearance by altering the overall facial shape based on capturing artists' exaggeration-prototypes. Rare attempts have been made to alter and control the facial expressions of the generated caricatures. Moreover, example-based approaches learn how to generate artistic sketch styles through a training phase with prototypes from artist sketches. One of the limitations to these systems is that they require a lot of manual work with a large number of training prototypes drawn by artists. In addition, the final appearance of the caricature can only be limited to the prototypes used in the training phase.