Abstract
The acquisition of translucent objects has become a very common task thanks to the progress of 3D scanning technology. Since the characteristic soft appearance of translucent objects is due to subsurface scattering, the details are naturally left out in this appearance. For objects that have complex shapes, this lack of detail is obviously more prominent. In this paper, we propose a method to preserve the details of surface geometry by adding highlight effects. In generating highlight effects, our method employs a local orthonormal frame and combines, in a novel way, the incoming and outgoing light in approximating the subsurface scattering process. When the incident illuminant direction changes from nearly overhead to nearly horizontal, our method effectively preserves complex surface geometry details in the appearance of translucent materials. Through experiments, we show that our method can store surface features as well as maintain the translucency of the original materials and even enhance the perception of translucency. By numerically comparing the generated highlight effects with those generated by the traditional Bidirectional Reflectance Distribution Function (BRDF) models with different bandwidth parameters, we demonstrate the validity of our proposed method.
Highlights
Advances in 3D scanning technology have been widely applied to object acquisition due to the abundance of low-cost RGB-D sensors
Translucent objects are very common in realistic domestic environments, and by placing a scanner at strategically selected positions, geometric details can be captured with thoroughness and high fidelity
In rendering the complex scanned data of objects made from translucent materials, blurred geometric details become more pronounced as the illuminant direction approaches a horizontal orientation
Summary
Advances in 3D scanning technology have been widely applied to object acquisition due to the abundance of low-cost RGB-D sensors. In rendering the complex scanned data of objects made from translucent materials, blurred geometric details become more pronounced as the illuminant direction approaches a horizontal orientation. To preserve subtle geometry details in the appearance of translucent materials, we developed a method that combines subsurface scattering approximation with generated highlight effects. We applied the directional dipole model with slant illuminant angles to the highlight-generation method and successfully maintained complicated geometry details in the rendering results for translucent materials. We chose the directional dipole model for rendering translucent materials because it considers the directions of incoming and outgoing light of the light-scattering process in the estimation of BSSRDF, and it captures translucency effects that are present in the full path tracing and geometry details by directional illuminant light, both of which remain absent in other models. By filtering NDF, Kaplanyan [28] found small highlights across an entire pixel footprint
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
