发明名称 |
Method for determining motion using a velocity predictor |
摘要 |
A method is provided for determining motion of an optical sensor including a periodic photo-diode array relative to a surface. The method includes steps of (i) generating sets of quasi-sinusoidal signals responsive to motion along first and second directions; (ii) combining the sets of signals to generate a wrapped phase angle value for each direction at a first time; (iii) combining the sets of signals at a second time to generate a second wrapped phase angle value for each direction; (iv) computing wrapped phase angle changes for each direction between the first time and the second time; (v) computing velocity predictors for each direction using corrected average phase angle changes from a number of preceding successive frames; (vi) calculating the number of full 27pi rotations needed to unwrap the phase angle changes for each direction using the velocity predictors; and (vii) computing the unwrapped or corrected phase angle changes.
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申请公布号 |
US2007165207(A1) |
申请公布日期 |
2007.07.19 |
申请号 |
US20060324424 |
申请日期 |
2006.01.03 |
申请人 |
SILICON LIGHT MACHINES CORPORATION |
发明人 |
XU YANSUN;TODOROFF BRIAN D. |
分类号 |
G01P3/36;G01C3/08 |
主分类号 |
G01P3/36 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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