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    • 14. 发明授权
    • Object detection for sudden illumination changes using order consistency
    • US07006128B2
    • 2006-02-28
    • US10158632
    • 2002-05-30
    • Binglong XieVisvanathan RameshTerrance Boult
    • Binglong XieVisvanathan RameshTerrance Boult
    • H04N7/18
    • G08B13/19604G06T7/254
    • 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.