The effects of changing projection geometry on the interpretation of 3D orientation on tabletops

Mark Hancock; Miguel Nacenta; Carl Gutwin; Sheelagh Carpendale

doi:10.1145/1731903.1731934

The effects of changing projection geometry on the interpretation of 3D orientation on tabletops

Mark Hancock, Miguel Nacenta, Carl Gutwin, Sheelagh Carpendale

School of Computer Science

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Applications with 3D models are now becoming more common on tabletop displays. Displaying 3D objects on tables, however, presents problems in the way that the 3D virtual scene is presented on the 2D surface; different choices in the way the projection is designed can lead to distorted images and difficulty interpreting angles and orientations. To investigate these problems, we studied people's ability to judge object orientations under different projection conditions. We found that errors increased significantly as the center of projection diverged from the observer's viewpoint, showing that designers must take this divergence into consideration, particularly for multi-user tables. In addition, we found that a neutral center of projection combined with parallel projection geometry provided a reasonable compromise for multi-user situations.

Original language	English
Title of host publication	Proceedings of the ACM International Conference on Interactive Tabletops and Surfaces
Place of Publication	Banff, Alberta, Canada
Publisher	ACM
Pages	157-164
Number of pages	8
DOIs	https://doi.org/10.1145/1731903.1731934
Publication status	Published - 2009

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10.1145/1731903.1731934

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title = "The effects of changing projection geometry on the interpretation of 3D orientation on tabletops",

abstract = "Applications with 3D models are now becoming more common on tabletop displays. Displaying 3D objects on tables, however, presents problems in the way that the 3D virtual scene is presented on the 2D surface; different choices in the way the projection is designed can lead to distorted images and difficulty interpreting angles and orientations. To investigate these problems, we studied people's ability to judge object orientations under different projection conditions. We found that errors increased significantly as the center of projection diverged from the observer's viewpoint, showing that designers must take this divergence into consideration, particularly for multi-user tables. In addition, we found that a neutral center of projection combined with parallel projection geometry provided a reasonable compromise for multi-user situations.",

author = "Mark Hancock and Miguel Nacenta and Carl Gutwin and Sheelagh Carpendale",

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doi = "10.1145/1731903.1731934",

language = "English",

pages = "157--164",

booktitle = "Proceedings of the ACM International Conference on Interactive Tabletops and Surfaces",

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The effects of changing projection geometry on the interpretation of 3D orientation on tabletops. / Hancock, Mark; Nacenta, Miguel; Gutwin, Carl et al.
Proceedings of the ACM International Conference on Interactive Tabletops and Surfaces. Banff, Alberta, Canada: ACM, 2009. p. 157-164.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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AU - Carpendale, Sheelagh

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AB - Applications with 3D models are now becoming more common on tabletop displays. Displaying 3D objects on tables, however, presents problems in the way that the 3D virtual scene is presented on the 2D surface; different choices in the way the projection is designed can lead to distorted images and difficulty interpreting angles and orientations. To investigate these problems, we studied people's ability to judge object orientations under different projection conditions. We found that errors increased significantly as the center of projection diverged from the observer's viewpoint, showing that designers must take this divergence into consideration, particularly for multi-user tables. In addition, we found that a neutral center of projection combined with parallel projection geometry provided a reasonable compromise for multi-user situations.

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ER -

The effects of changing projection geometry on the interpretation of 3D orientation on tabletops

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