Motion detection mechanism for laser illuminated optical...

Details Motion detection mechanism for laser illuminated optical... Motion detection mechanism for laser illuminated optical...

2011-01-25

2011-01-25

Nguyen, Chanh (Department: 2629)

Computer graphics processing and selective visual display system

Display peripheral interface input device

Cursor mark position control device

C345S158000

Reexamination Certificate

active

07876307

ABSTRACT:
There is described a method for measuring relative motion between an illuminated portion of a surface and an optical sensing device comprising a coherent light source and a photodetector array, the method comprising the steps of illuminating under a determined gradient by means of the coherent light source the surface portion at a determined flash rate; detecting by means of the photodetector array speckled light intensity pattern of the illuminated portion of the surface for a first flash; detecting a second speckled light intensity pattern of the illuminated portion of the surface for a second flash; extracting motion features of two different types from the detected first and second speckled light intensity patterns; determining a measurement of the relative motion between the optical sensing device and the illuminated surface portion based on a comparison of motion features extracted; wherein before the step of determining a measurement of the relative motion, the method further comprises the step of keeping only pairs of neighbouring motion features including one motion feature of both different types.

REFERENCES:
patent: 4631400 (1986-12-01), Tanner et al.
patent: 4794384 (1988-12-01), Jackson
patent: 5793357 (1998-08-01), Ivey et al.
patent: 2002/0105656 (2002-08-01), Nahum et al.
patent: 2005/0062720 (2005-03-01), Rotzoll et al.
patent: WO 03 049018 (2003-06-01), None
patent: WO 03/049018 (2003-06-01), None

Affiliated with

Also associated with

Rating

Motion detection mechanism for laser illuminated optical... 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 detection mechanism for laser illuminated optical..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Motion detection mechanism for laser illuminated optical... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2657142