Campus Event Calendar
Event Entry
What and Who
Light Scattering by Turbid Materials
Jeppe Revall Frisvad
Technical University of Denmark
Talk
TBA
AG 4
AG Audience
English
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Date, Time and Location
Wednesday, 2 July 2008
13:00
45 Minutes
E1 4
024
Saarbrücken
Abstract
Scattering and absorption are the quintessential material properties
that we need in order to render photorealistic images. These
properties are traditionally measured, approximated using an empirical
formula, or guessed by manual adjustment. However, such methods are
often inflexible or imprecise. This talk is about physically-based
estimation of material properties. Most materials are composed of
randomly distributed particles of different sizes and shapes. Using a
set of commonly occuring particles, we have a flexible tool for
computing or even engineering the appearance of many different
materials. In addition, this connection between particle contents and
photographic appearance enables us to approximately measure the
contents of materials using off-the-shelf camera technology. The main
difficulty in the discussed approach is, firstly, to justify the use
of physically-based scattering and absorption properties in the
macroscopic rendering equations. Secondly, it is for some materials
difficult to establish the correct particle composition. Nevertheless,
the particle composition of more and more materials are becoming
available in optical literature as they prove useful in many different
contexts. This sets the scene for graphics people to come up with
models that map intuitive parameters (such as temperature and a
weight-percent contents declaration) to the appearance of materials.
that we need in order to render photorealistic images. These
properties are traditionally measured, approximated using an empirical
formula, or guessed by manual adjustment. However, such methods are
often inflexible or imprecise. This talk is about physically-based
estimation of material properties. Most materials are composed of
randomly distributed particles of different sizes and shapes. Using a
set of commonly occuring particles, we have a flexible tool for
computing or even engineering the appearance of many different
materials. In addition, this connection between particle contents and
photographic appearance enables us to approximately measure the
contents of materials using off-the-shelf camera technology. The main
difficulty in the discussed approach is, firstly, to justify the use
of physically-based scattering and absorption properties in the
macroscopic rendering equations. Secondly, it is for some materials
difficult to establish the correct particle composition. Nevertheless,
the particle composition of more and more materials are becoming
available in optical literature as they prove useful in many different
contexts. This sets the scene for graphics people to come up with
models that map intuitive parameters (such as temperature and a
weight-percent contents declaration) to the appearance of materials.
Contact
Thorsten Thormählen
+49 681 9325-651
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Thorsten Thormählen, 07/01/2008 14:45 -- Created document.