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CCS
2010
ACM
15 years 28 days ago
Scene tagging: image-based CAPTCHA using image composition and object relationships
In this paper, we propose a new form of image-based CAPTCHA we term "scene tagging". It tests the ability to recognize a relationship between multiple objects in an imag...
Peter Matthews, Cliff Changchun Zou
VISSYM
2007
15 years 15 hour ago
Hardware-accelerated Stippling of Surfaces derived from Medical Volume Data
We present a fast hardware-accelerated stippling method which does not require any preprocessing for placing points on surfaces. The surfaces are automatically parameterized in or...
Alexandra Baer, Christian Tietjen, Ragnar Bade, Be...
COMPGEOM
2008
ACM
14 years 11 months ago
Circular partitions with applications to visualization and embeddings
We introduce a hierarchical partitioning scheme of the Euclidean plane, called circular partitions. Such a partition consists of a hierarchy of convex polygons, each having small ...
Krzysztof Onak, Anastasios Sidiropoulos
VISSYM
2004
14 years 11 months ago
Interaction Spaces in Data and Information Visualization
User interaction plays an integral part in the effective visualization of data and information. Typical interaction operations include navigation, selection, and distortion. A pro...
Matthew O. Ward, Jing Yang
SGP
2003
14 years 11 months ago
Multi-Chart Geometry Images
We introduce multi-chart geometry images, a new representation for arbitrary surfaces. It is created by resampling a surface onto a regular 2D grid. Whereas the original scheme of...
Pedro V. Sander, Zoë J. Wood, Steven J. Gortl...