Proceedings of the 24th annual conference on Computer graphics and interactive techniques
Strategies for effectively visualizing 3D flow with volume LIC
VIS '97 Proceedings of the 8th conference on Visualization '97
A non-photorealistic lighting model for automatic technical illustration
Proceedings of the 25th annual conference on Computer graphics and interactive techniques
Enhancing Transparent Skin Surfaces with Ridge and Valley Lines
VIS '95 Proceedings of the 6th conference on Visualization '95
Effects of rendering on shape perception in automobile design
APGV '04 Proceedings of the 1st Symposium on Applied perception in graphics and visualization
Conveying three-dimensional shape with texture
APGV '04 Proceedings of the 1st Symposium on Applied perception in graphics and visualization
APGV '05 Proceedings of the 2nd symposium on Applied perception in graphics and visualization
The assumed light direction for perceiving shape from shading
Proceedings of the 5th symposium on Applied perception in graphics and visualization
How well do line drawings depict shape?
ACM SIGGRAPH 2009 papers
Radiance Scaling for versatile surface enhancement
Proceedings of the 2010 ACM SIGGRAPH symposium on Interactive 3D Graphics and Games
EuroVis'11 Proceedings of the 13th Eurographics / IEEE - VGTC conference on Visualization
How does lighting direction affect shape perception of glossy and matte surfaces?
Proceedings of the ACM Symposium on Applied Perception
Surface perception of planar abstractions
ACM Transactions on Applied Perception (TAP) - Special issue SAP 2013
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In many domains it is very important that observers form an accurate percept of 3-dimensional structure from 2-dimensional images of scenes or objects. This is particularly relevant for designers who need to make decisions concerning the refinement of novel objects that haven't been physically built yet. This study presents the results of two experiments whose goal was to test the effect of lighting direction on the shape perception of smooth surfaces using shading and lighting techniques commonly used in modeling and design software. The first experiment consisted of a 2 alternate forced choice task which compared the effect of the amount of shape difference between smooth surfaces lit by a single point light with whether the position of the light sources were the same or different for each surface. Results show that, as the difference between the shapes decreased, participants were more and more biased towards choosing the match shape lit by the same source as the test shape. In the second experiment, participants had to report the orientation at equivalent probe locations on pairs of smooth surfaces presented simultaneously, using gauge figures. The surfaces could either be the same or slightly different and the light source of each shape could either be at the same relative location or offset by 90° horizontally. Participants reported large differences in surface orientation when the lighting condition was different, even when the shapes were the same, confirming the first results. Our findings show that lighting conditions can have a strong effect on 3-dimensional perception, and suggest that great care should be taken when projection systems are used for 3D visualisation where an accurate representation is required, either by carefully choosing lighting conditions or by using more realistic rendering techniques.