Capturing Piecewise SVBRDFs with Content Aware Lighting
We present a method for capturing piecewise SVBRDFs over flat surfaces that consist of piecewise homogeneous materials with arbitrary geometric details. To achieve fast and simple capture, our method first evaluates the piecewise material distribution over the surface from an image taken with uniform lighting and then find an suitable 2D light pattern according to the material’s spatial distribution, which combines both step edge and gradient lighting patterns. After that, we capture another image of the surface lit by the optimized light pattern and reconstruct the SVBRDF and normal details from two captured images. The capturing only takes two photographs and the light pattern optimization is executed in real time, which enables us to design a simple device setup for on-site capturing. We validate our approach and demonstrate the efficiency of our method on a wide range of synthetic and real materials.
KeywordsAppearance capture Adaptive capture SVBRDF
- 2.Chen, G., Dong, Y., Peers, P., Zhang, J., Tong, X.: Reflectance scanning: estimating shading frame and BRDF with generalized linear light sources. ACM Trans. Graph. 33(4), 117 (2014)Google Scholar
- 6.Dong, Y., et al.: Manifold bootstrapping for SVBRDF capture. ACM Trans. Graph. 29(4), 98 (2010)Google Scholar
- 11.Ma, W.C., Hawkins, T., Peers, P., Chabert, C.F., Weiss, M., Debevec, P.: Rapid acquisition of specular and diffuse normal maps from polarized spherical gradient illumination. In: EGSR 2007, pp. 183–194 (2007)Google Scholar
- 13.Wang, C.P., Snavely, N., Marschner, S.: Estimating dual-scale properties of glossy surfaces from step-edge lighting. ACM Trans. Graph. 30(6) (2011)Google Scholar
- 14.Zhang, Z.: Flexible camera calibration by viewing a plane from unknown orientations. In: ICCV 1999, vol. 1, pp. 666–673. IEEE (1999)Google Scholar