Digital Material Appearance

Accurate and detailed representations of real-world materials are a crucial ingredient to any computer graphics application. An important strand of our research is dedicated to developing new methods for the acquisition, representation, manipulation and reproduction of digital material models, and understanding the factors that contribute to successful communication of measurable and subjective material properties.

Publications

Digital Transmission of Subjective Material Appearance

Rodrigo Martín, Michael Weinmann, Matthias B. Hullin
Proc. WSCG, 2017.

How well do various digital appearance representations perform at communicating the "touch and feel" of materials?

Scratch Iridescence: Wave-Optical Rendering of Diffractive Surface Structure

Sebastian Werner*, Zdravko Velinov*, Wenzel Jakob, Matthias B. Hullin (* joint first authors)
ACM Transactions on Graphics 36(6) (Proc. SIGGRAPH Asia), to appear, 2017.

Many real-world surfaces are covered in fine scratches that diffract light in colorful ways. Our model seamlessly transitions between ray optics and wave optics to recreate this intricate effect.

An Interactive Appearance Model for Microscopic Fiber Surfaces

Zdravko Velinov and Matthias Hullin
Proc. Vision, Modeling and Visualization, Bayreuth, Germany, 2016.

A reflectance model for pile fabrics that you can "draw on" using your fingers, like velvet or Alcantara.

Dynamic Display of BRDFs

Matthias B. Hullin, Hendrik P. A. Lensch, Ramesh Raskar, Hans-Peter Seidel, Ivo Ihrke
Computer Graphics Forum (Proc. EUROGRAPHICS), 2011.

We define the problem of physically displaying material appearance, and demonstrate a conceptual device that exhibits precisely controllable reflectance distributions by generating waves on a water surface.