Saturday, November 08, 2008
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Toward Evaluating Lighting Design Interface Paradigms for Novice Users
The Department of Computer Science at Dartmouth College
announces a new technical report:

Toward Evaluating Lighting Design Interface Paradigms for Novice Users

Dartmouth Technical Report TR2008-636

William Brandon Kerr
Fabio Pellacini

Date: November 2008

Abstract:
Lighting design is a complex and fundamental task in computer
cinematography, involving adjustment of light parameters to define
final scene appearance. Many lighting interfaces have been proposed to
improve lighting design work flow. These paradigms exist in three
paradigm categories: direct light parameter manipulation, indirect
light feature manipulation (e.g., shadow dragging), and goal-based
optimization of light through painting. To this date, no formal
evaluation of the relative effectiveness of these methods has been
performed. In this paper, we present a first step toward evaluating
the three paradigms in the form of a user study with novice users. We
focus our evaluation on simple tasks that directly affect lighting
features, such as highlights, shadows and intensity gradients, in
scenes with up to 2 point lights and 5 objects under direct
illumination. We perform quantitative experiments to measure relative
efficiency between interfaces together with qualitative !
input to explore the intuitiveness of the paradigms. Our results
indicate that paint-based goal specification is more cumbersome than
either direct or indirect manipulation. Furthermore, our investigation
suggests improvements to not only the implementation of the paradigms,
but also overall paradigm structure for further exploration.


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