57. PAPER

Department: Computer Science & Engineering
Faculty Advisor(s): Henrik Wann Jensen

Primary Student
Name: Krystle E De Mesa
Email: kdemesa@ucsd.edu
Phone: 858-534-8829
Grad Year: 2009

Student Collaborators
Marios Papas, mpapas@cs.ucsd.edu

Abstract
Although paper is a common material used in our everyday lives, modeling its appearance proves to be a challenge. Widely used BRDF models are limited in their ability to account for various phenomena, such as subsurface scattering, and can fail to produce convincing results when visible properties change in response to different lighting and viewing angles.

Paper, which is assumed to have diffuse characteristics by many, is actually a complex material consisting of thin layers of cellulose pulp and coatings. Depending on the pulp manufacturing process, paper quality varies in terms of durability, roughness, absorbency, and appearance. Additionally, the level of gloss and amount of specular reflection is affected by coating types.

For this project, we focus on analyzing the following three papers: Epson ultra premium glossy photo paper, Epson ultra premium luster photo paper, and Boise Aspen multipurpose office paper. For each paper, we perform a Bidirectional Reflectance Distribution Function (BRDF) extraction using the UCSD Spherical Gantry and show our results for fitting this data against a common BRDF model. Our ultimate goal is to reveal paper's unique qualities and to develop a novel approach that accurately represents this material with ink, thereby allowing graphic/print design to look the same onscreen as it does on press.

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