Television – Special applications – Observation of or from a specific location
Reexamination Certificate
2006-02-28
2006-02-28
Philippe, Gims (Department: 2613)
Television
Special applications
Observation of or from a specific location
C348S131000, C356S394000
Reexamination Certificate
active
07006128
ABSTRACT:
A system and method for object detection with sudden illumination changes provides a system including a camera model unit for computing a difference map between a first input image and a second input image, an illumination model unit in signal communication with the camera model unit for comparing the sign of the difference between two pixels in a first input image against the sign of the difference between two pixels in a second input image, and a CPU in signal communication with the camera model unit and the illumination model unit for detecting a changed object in accordance with said comparison when said sign of the difference is changed; and a corresponding method including providing a first image having a number of pixels, receiving a second image subsequent to the first image, calculating a difference map between the first and second images, selecting a pair of pixel locations from the first or second images in accordance with the difference map, statistically modeling a camera noise level for the first and second images, computing the likelihood of order inconsistency between a pair of pixel values at the selected locations in the first image and a pair of pixel values at the selected locations in the second image in accordance with the camera noise level; and detecting a changed object in accordance with the computed likelihood.
REFERENCES:
patent: 4805123 (1989-02-01), Specht et al.
patent: 5353061 (1994-10-01), Rodriguez et al.
patent: 6307888 (2001-10-01), Le Clerc
patent: 6404461 (2002-06-01), Le Clerc
Boult Terrance
Ramesh Visvanathan
Xie Binglong
F. Chau & Associates, Ltd.
Paschburg Donald B.
Philippe Gims
Siemens Corporate Research Inc.
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