We present a system for semi-automatic creation of bas-relief sculpture. As an artistic medium, relief spans the continuum between 2D drawing or painting and full 3D sculpture. Bas-relief (or low relief) presents the unique challenge of squeezing shapes into a nearly-flat surface while maintaining as much as possible the perception of the full 3D scene. Our solution to this problem adapts methods from the tone-mapping literature, which addresses the similar problem of squeezing a high dynamic range image into the (low) dynamic range available on typical display devices. However, the bas-relief medium imposes its own unique set of requirements, such as maintaining small, fixed-size depth discontinuities. Given a 3D model, camera, and a few parameters describing the relative attenuation of different frequencies in the shape, our system creates a relief that gives the illusion of the 3D shape from a given vantage point while conforming to a greatly compressed height.
Tim Weyrich, Jia Deng, Connelly Barnes, Szymon Rusinkiewicz, Adam Finkelstein.
ACM Transactions on Graphics (Proc. SIGGRAPH), 26, 3 (Jul. 2007), 32 (7 pp.), Los Angeles, CA, 2007.Tim Weyrich, Jia Deng, Connelly Barnes, Szymon Rusinkiewicz, and Adam Finkelstein. Digital bas-relief from 3D scenes. ACM Trans. on Graphics (Proc. ACM SIGGRAPH 2007), 26(3):32:1–32:7, 2007.Weyrich, T., Deng, J., Barnes, C., Rusinkiewicz, S., and Finkelstein, A. 2007. Digital bas-relief from 3D scenes. ACM Trans. on Graphics (Proc. ACM SIGGRAPH 2007) 26, 3, 32:1–32:7.T. Weyrich, J. Deng, C. Barnes, S. Rusinkiewicz, and A. Finkelstein, “Digital bas-relief from 3D scenes,” ACM Trans. on Graphics (Proc. ACM SIGGRAPH 2007), vol. 26, no. 3, pp. 32:1–32:7, 2007.
We thank Christoph Spaäth and the Digital Stone Project for many insightful discussions as well as for their support in milling the stone dragon sculpture. Models are from the Google 3D Warehouse and the Stanford 3D Scanning Repository. Photos in Figure 2 are courtesy of (upper row) Wikipedia and Cultural Heritage Imaging and (lower row) the US Bureau of Land Management and the US Treasury. We thank the Sloan Foundation and the National Science Foundation grants CCF-0347427 and IIS-0511965 for funding.