Some inspiration for the types of appearance we will discuss in class (clouds, plants, milk, rust, skin, atmosphere/smoke):

Instructor

Henrik Wann Jensen

Office hours, Thursday 2:00-3:00pm

Mailing List

cse272(at)graphics.ucsd.edu

Book

Andrew Glassner, "Principles of Digital Image Synthesis", Morgan-Kaufman, 1995

Lectures

Tuesdays and Thursdays: 12:30pm - 1:50pm

Location

HSS 1128b

Contents

The appearance of the everyday world has long been a topic of interest to many people from painters to physicists. Even simple questions require careful thought. Why is the sky blue? Why does wet sand look darker than dry sand? How can you reproduce a human face using oil paints? More recently appearance models have become increasingly important in computer graphics and vision. In graphics, they are needed to model and simulate different materials. In vision, texture and reflection models can be used to guide the acquisition of computer models of different scenes and objects, as well as the recognition of these scenes and objects in images.

This class will go into the details of computer graphics algorithms for creating a given appearance. The course will cover the physics as well as the computational techniques for simulating light transport, light scattering, reflection models, subsurface scattering, participating media. In addition, we will be discussing the appearance of elements in the natural world in order to understand how to simulate this appearance.

Prerequisites

CSE190/CSE168 "Rendering Algorithms" or equivalent at the consent of the instructor. This is a fairly advanced class. Students are expected to have an understanding of computer graphics rendering algorithms such as ray tracing.

Grading

This is class is for 4 units. It will be graded based on a project and a lecture in the class (15% project proposal, 10% class presentation, more to follow)

Final Report

Should be in the format of a paper 6-10 pages using the style for ACM SIGGRAPH papers.

Useful links

• Causes of color

Deadlines

• October 14: Proposal 1-2 pages with problem statement, pictures, motivation, ideas on how to solve the problem, best with references to related papers. This proposal counts 15% towards the final grade.
• November 23: Paper draft (roughly 3 pages) showing a fairly complete abstract and introduction and some preliminary results. The paper should demonstrate a firm understanding of previous work and a clear idea of the approach taken. Look at the papers we have read in the class to get an idea of the typical layout. This paper draft counts 10% towards the final grade.

Schedule

• Welcome, Light Physics, Radiometry and Photometry
• Reading:
• Glassner, Chapter 13

• Light and Matter
• Reading:
• Glassner, Chapter 14

• BRDF Models and Measurements
• Reading:
• Glassner, Chapter 15

• BRDF Models (Rough Surfaces)
• Reading:
• Blinn, "Models of Light Reflection for Computer Synthesized Pictures", SIGGRAPH 1977
• Torrance and Sparrow, "Theory for off-specular reflection", JOSA 1967
• Ashikmin et al., "A microfacet based BRDF generator", SIGGRAPH 2000
• Oren and Nayar, "Generalization of Lambert's reflection model", SIGGRAPH 1994

• Light Transport, Global Illumination Algorithms
• Optional Reading:
• Kajiya, "The Rendering Equation", SIGGRAPH 1986
  
• Glassner, Chapter 18-19
• Photon mapping, BPT, MLT

• Guest lecture by Lawrence Frank - "Problems of Computation and Visualization in Magnetic Resonance Imaging"

• Participating Media 1 (Radiative transport, phase functions)
• Reading:
• Glassner, Chapter 12
• Optional Reading:
• Chandrasekhar, "Radiative Transfer", pages 1-21

• Participating Media 2 (Ray marching, photon mapping)
• Reading:
• Jensen, "Realistic Image Synthesis using Photon Mapping", chapter 10

• Participating Media 3 (Multiple Scattering)

• Subsurface Scattering 1 (BRDF Models)
• Reading:
• Paul Kubelka and Franz Munk, "Ein Beitrag zur Optik der Farbanstriche", Zeitschrift fu"r Technishen Physik 12(112)
  (English translation by Steve Westin)
• Jim Blinn, "Light reflection functions for simulation of clouds and dusty surfaces", SIGGRAPH 1982
• Pat Hanrahan and Wolfgang Krueger, "Reflection from Layered Surfaces due to Subsurface Scattering", SIGGRAPH 1993

• Guest lecture by Josh Wills: "The appearance of Halos"
• And the beginning of the subsurface scattering 2 lecture

• Subsurface Scattering 2 (BSSRDF Models)
• Reading:
• Jensen, Marschner, Levoy, and Hanrahan, A Practical Model for Subsurface Light Transport", SIGGRAPH 2001
• Jensen and Buhler, A Rapid Hierarchical Rendering Technique for Translucent Materials", SIGGRAPH 2002

• Alex Kulungowski: "Rendering of Bubbly Ice"
• Cameron Chrisman: "Rendering of Snow"

• Neel Joshi: "Measuring BRDFs"
• Neil Alldrin: "Reflectance Estimation under Natural Illumination"

• Veterans Day Holiday

• Jefferson Ng: "Rendering of Butterfly Wings"
• Patrick Yau: "Rendering of Light Dispersion"

• Mara Silva: "Modeling and Rendering of Patina"
• Siddhartha Saha: "Modeling and Rendering of Rust"

• No Class

• Thanksgiving

• Tak Chu: "Rendering Tornadoes"
• Andrew Smith: "Simulating and Rendering of Splashing Cognac"

• Werner Jainek: "Simulating Spatially Varying Anisotropic Metals"
• Stephan Steinbach: "Rendering Human Skin"
• Emrah Kostem: "Rendering Paper Birch Tree Bark"

Students

Neil Aldrin
Andrew Smith
Werner Jainek
Cameron Chrisman
Siddhartha Saha
Stephan Steinbach
Tak Chu
Jefferson Ng
Mara Silva
Alexander Ward Kulongowski
Neel Joshi
Patrick Yau

Matthew Clothier
Arash Keshmirian
Fang Yi Liu
Henry Mitchell
David Klenk
Lin Ying Liu
Louka Plagnekov
Sanjeev Kumar