Methods and apparatuses for compound tracking systems
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United States of America Patent
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Feb 2, 2010
Grant Date -
Jan 19, 2006
app pub date -
Jul 15, 2004
filing date -
Jul 15, 2004
priority date (Note) -
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Abstract
A method, apparatus, and system for tracking movement of a device are described. The method includes steps of implementing a first tracking subsystem for tracking positions of a device against a surface, determining whether to implement a second tracking subsystem for tracking positions of the device against the surface, capturing data corresponding to a location on the surface, and determining a position of the device against the surface based on the captured data. The position of the device can then be transmitted to a host computer and used in an application program. The first and second tracking subsystems may be a relative and an absolute tracking subsystem respectively.
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