Image analysis – Applications – Motion or velocity measuring
Reexamination Certificate
2008-11-17
2011-12-13
Lu, Tom Y (Department: 2624)
Image analysis
Applications
Motion or velocity measuring
C375S240130, C382S300000
Reexamination Certificate
active
08077925
ABSTRACT:
The present invention discloses a method for motion sensing of sub-pixel level precision. The method comprises the following steps: acquiring a reference image (reference frame) and a sample image (sample frame) of a surface; calculating the correlation between the reference frame and the sample frame to obtain a motion vector of a photoelectric mouse with respect to this surface; subjecting the reference frame and the sample frame to interpolation to obtain the interpolated reference frame and the interpolated sample frame; calculating the correlation between the interpolated reference frame and the interpolated sample frame in order to correct the aforesaid motion vector and to obtain the movement of the sub-pixel. The precision of displacement measurement can be improved effectively by this method under the condition that sensor's characteristics are not changed to improve the performance of the photoelectric mouse.
REFERENCES:
patent: 5400087 (1995-03-01), Uramoto et al.
patent: 7343044 (2008-03-01), Baba et al.
patent: 2004/0101058 (2004-05-01), Sasai et al.
patent: 2006/0233253 (2006-10-01), Shi et al.
patent: 2009/0016623 (2009-01-01), Higewake
Li Zhiqian
Yan Yongqing
Beijing Sigmachip Co., Ltd
Lu Tom Y
Sawyer Law Group P.C.
LandOfFree
Motion sensing method of sub-pixel level precision does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Motion sensing method of sub-pixel level precision, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Motion sensing method of sub-pixel level precision will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4257570