Processing methods for speckle-based motion sensing
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United States of America Patent
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Sep 11, 2012
Grant Date -
Feb 12, 2009
app pub date -
Aug 6, 2007
filing date -
Aug 6, 2007
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Abstract
One embodiment relates to a method of tracking motion using a speckle-based motion sensor. A distance moved is determined by a first signal processing procedure, and a distance moved is determined by a second signal processing procedure. Selection between said distances is made based on whether the distance determined by the first signal processing procedure exceeds a predetermined threshold distance. According to a preferred embodiment, the first signal processing procedure makes a more accurate determination of distance for slower speeds, while the second signal processing procedure makes a more accurate determination of distance for higher speeds. Other embodiments, aspects and features are also disclosed.
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