Wrinkle modeling based on shape control functions and adaptive subdivision
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Abstract:
Realistic wrinkles are an extremely important contribution for enhancing the realism of three dimensional (3D) face model.For different shapes of the wrinkle in three views, this paper proposes three shape control functions for each view, namely, cross-sectional shape control function (CSCF), depth attenuation function (DAF) and width attenuation function (WAF).CSCF is used to realistically and naturally express the furrows and bulges of wrinkles. Depth attenuation function and width attenuation function are applied to control the attenuation variations of the depth and width. Users can create various wrinkles just defining several intuitive parameters. Meanwhile, an image matching technique based on feature is employed to obtain three dimensional wrinkle lines. And a simple adaptive subdivision approach is proposed in the predefined influence region to adjust the resolution around the wrinkle mesh for better results and enhance the efficiency of wrinkle modeling simultaneously. Comparing experiment results with the corresponding image demonstrates that our method can generate realistic and natural wrinkles and can greatly improve the similarity of face model.
