| Halo (visualization Technique) |
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Information AboutHalo (visualization Technique) |
For other uses, see Halo (disambiguation) . In Information Visualization , the halo technique is a method for viewing large documents on small screens or Display Windows , which functions by pointing users to the locations objects out of the visible field. Off-screen objects are surrounded by rings which reach into the border visible field (or window). From the position of the arc-shaped marker, combined with its curvature, users can infer the off-screen location of the object. Halo has been used to display maps on Personal Digital Assistant s and Mobile Phone s. The name of the technique was derived from the metaphor of a streetlamp shining a Halo onto the street. The technique was invented by Patrick Baudisch in 2001, while at Xerox PARC , A similar concept is Arrow Location , where the direction of objects is represented by a directional marker shown in the border. This variant has been used in 3D Video Game s for several years. Arrow-based techniques convey the direction to off-screen locations, but require additional scale-dependent annotations in order to convey distance. Halo arcs, in contrast, point to a location, which implies direction and distance. ADVANTAGES
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