Matting and Compositing for Fresnel Reflection on Wavy Surfaces

Yuki Endo1, Yoshihiro Kanamori1, Yukio Fukui1 and Jun Mitani1, 2

1University of Tsukuba, 2JST/ERATO


This paper introduces a framework that can extract an alpha matte from a single image with Fresnel reflection, and that can composite other objects with the image such that plausible reflections are included. Our method handles reflections in a plane with small undulations, for example, a water surface with waves or a glossy tabletop. During the matting stage, our method first estimates the transmission color, which is assumed to be uniform, and then calculates a reflection image and alpha matte based on user markups. However, accurate extraction of the matte becomes challenging when a plane has small undulations because these create perturbations in the matte. We therefore propose a filter that can refine the matte effectively. In the compositing stage, the reflection of a composited object is synthesized by ray tracing in real time. We demonstrate the effectiveness of our method through comparisons with ground-truth data and results using natural images as inputs.


  1. Yuki Endo, Yoshihiro Kanamori, Yukio Fukui and Jun Mitani: "Matting and Compositing for Fresnel Reflection on Wavy Surfaces," Computer Graphics Forum (Proc. of Eurographics Symposium on Rendering 2012), Vol. 31, No. 4, pp. 1435-1443, 2012. [PDF (2.1MB)] [PPTX (18.6MB, without movies)] [Movie (24.4MB)] [BibTex]

Last modified: 28 June, 2012