FAU > Technische Fakultät > Informatik > Lehrstuhl 15 (Digital Reality)
Mallikarjun B R1, Ayush Tewari1, Tae-Hyun Oh2, Tim Weyrich3, Bernd Bickel4, Hans-Peter Seidel1, Hanspeter Pfister5, Wojciech Matusik6, Mohamed Elgharib1, Christian Theobalt1
1 Max Planck Institute for Informatics, Saarbrücken, Germany
2 POSTECH
3 University College London
4 Institute for Science and Technology Austria
5 Harvard University
6 Massachusetts Institute of Technology
The reflectance field of a face describes the reflectance properties responsible for complex lighting effects including diffuse, specular, inter-reflection and self shadowing. Most existing methods for estimating the face reflectance from a monocular image assume faces to be diffuse with very few approaches adding a specular component. This still leaves out important perceptual aspects of reflectance as higher-order global illumination effects and self-shadowing are not modeled. We present a new neural representation for face reflectance where we can estimate all components of the reflectance responsible for the final appearance from a single monocular image. Instead of modeling each component of the reflectance separately using parametric models, our neural representation allows us to generate a basis set of faces in a geometric deformation-invariant space, parameterized by the input light direction, viewpoint and face geometry. We learn to reconstruct this reflectance field of a face just from a monocular image, which can be used to render the face from any viewpoint in any light condition. Our method is trained on a light-stage training dataset, which captures 300 people illuminated with 150 light conditions from 8 viewpoints. We show that our method outperforms existing monocular reflectance reconstruction methods, in terms of photorealism due to better capturing of physical premitives, such as sub-surface scattering, specularities, self-shadows and other higher-order effects.
Mallikarjun B R, Ayush Tewari, Tae-Hyun Oh, Tim Weyrich, Bernd Bickel, Hans-Peter Seidel, Hanspeter Pfister, Wojciech Matusik, Mohamed Elgharib, Christian Theobalt. Proc. of IEEE Conference on Computer Vision and Pattern Recognition (CVPR), June 2021. |
Mallikarjun B R, Ayush Tewari, Abdallah Dib, Tim Weyrich, Bernd Bickel, Hans-Peter Seidel, Hanspeter Pfister, Wojciech Matusik, Louis Chevallier, Mohamed Elgharib, Christian Theobalt. Transactions on Computer Graphics (Proc. SIGGRAPH), 40(4), 44:1–44:16, July 2021.Mallikarjun B R, Ayush Tewari, Abdallah Dib, Tim Weyrich, Bernd Bickel, Hans-Peter Seidel, Hanspeter Pfister, Wojciech Matusik, Louis Chevallier, Mohamed Elgharib, and Christian Theobalt. PhotoApp: Photorealistic appearance editing of head portraits. In Transactions on Graphics (Proc. SIGGRAPH), volume 40, pages 44:1–44:16, July 2021.B R, M., Tewari, A., Dib, A., Weyrich, T., Bickel, B., Seidel, H.-P., Pfister, H., Matusik, W., Chevallier, L., Elgharib, M., and Theobalt, C. 2021. PhotoApp: Photorealistic appearance editing of head portraits. In Transactions on Graphics (Proc. SIGGRAPH), vol. 40, 44:1–44:16.M. B R, A. Tewari, A. Dib, T. Weyrich, B. Bickel, H.-P. Seidel, H. Pfister, W. Matusik, L. Chevallier, M. Elgharib, and C. Theobalt, “PhotoApp: Photorealistic appearance editing of head portraits,” in Transactions on Graphics (Proc. SIGGRAPH), vol. 40, no. 4, Jul. 2021, pp. 44:1–44:16. [Online]. Available: https://doi.org/10.1145/3450626.3459765 [Web Page][Preprint PDF (14 MB)][BibTeX] | |
Tim Weyrich, Wojciech Matusik, Hanspeter Pfister, Bernd Bickel, Craig Donner, Chien Tu, Janet McAndless, Jinho Lee, Addy Ngan, Henrik Wann Jensen, Markus Gross. ACM Transactions on Graphics (Proc. SIGGRAPH), pp. 1013–1024, Boston, MA, July 2006.Tim Weyrich, Wojciech Matusik, Hanspeter Pfister, Bernd Bickel, Craig Donner, Chien Tu, Janet McAndless, Jinho Lee, Addy Ngan, Henrik Wann Jensen, and Markus Gross. Analysis of human faces using a measurement-based skin reflectance model. ACM Trans. on Graphics (Proc. SIGGRAPH 2006), 25(3):1013–1024, 2006.Weyrich, T., Matusik, W., Pfister, H., Bickel, B., Donner, C., Tu, C., McAndless, J., Lee, J., Ngan, A., Jensen, H. W., and Gross, M. 2006. Analysis of human faces using a measurement-based skin reflectance model. ACM Trans. on Graphics (Proc. SIGGRAPH 2006) 25, 3, 1013–1024.T. Weyrich, W. Matusik, H. Pfister, B. Bickel, C. Donner, C. Tu, J. McAndless, J. Lee, A. Ngan, H. W. Jensen, and M. Gross, “Analysis of human faces using a measurement-based skin reflectance model,” ACM Trans. on Graphics (Proc. SIGGRAPH 2006), vol. 25, no. 3, pp. 1013–1024, 2006. [Web Page][PDF][Video][MERL/ETH Skin Reflectance Database][BibTeX] |
This work was supported by the ERC Consolidator Grant 4DReply (770784).