Matting and Compositing for Fresnel Reflection on Wavy Surfaces

  • Authors:
  • Yuki Endo;Yoshihiro Kanamori;Yukio Fukui;Jun Mitani

  • Affiliations:
  • University of Tsukuba;University of Tsukuba;-;University of Tsukuba and JST ERATO

  • Venue:
  • Computer Graphics Forum
  • Year:
  • 2012

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Abstract

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. © 2012 Wiley Periodicals, Inc.