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    • 6. 发明申请
    • Video based monitoring system and method
    • 视频监控系统及方法
    • US20080181457A1
    • 2008-07-31
    • US12009313
    • 2008-01-17
    • Rita ChattopadhyayArchana Kalyansundar
    • Rita ChattopadhyayArchana Kalyansundar
    • G06K9/00
    • G06K9/38G06K9/00771
    • There is described a video based monitoring system and method. The system comprises an image acquisition module, a movement detection module, and a stationary object detection module. The movement detection module is adapted for detecting the presence of a moving object in a region of interest of said captured video image. The stationary object detection module is adapted for detecting the presence of a stationary object in said region of interest and operable when said movement detection module fails to detect a moving object in a region of interest of a current frame of the captured image. The stationary object detection module includes a pixel-by-pixel comparison module adapted to determine the number of pixels in the region of interest in the current frame whose pixel values match with that of corresponding pixels in an immediately preceding frame. The stationary object detection module further includes a background identification module adapted to identify those pixels in the region of interest in the current frame that form part of a background, based upon a comparison of their pixel values with a background pixel value. The system further includes means for generating a signal to indicate detection of a stationary object when the number of matches between the current frame and the immediately preceding frame exceeds a threshold value after discounting those pixels in the current frame that are identified to be part of the background.
    • 描述了基于视频的监控系统和方法。 该系统包括图像采集模块,移动检测模块和静止物体检测模块。 所述运动检测模块适于检测所述拍摄视频图像的感兴趣区域中的移动物体的存在。 固定物体检测模块适于在所述感兴趣区域中检测静止物体的存在,并且当所述移动检测模块未能检测到所捕获图像的当前帧的感兴趣区域中的移动物体时可操作。 固定物体检测模块包括逐像素比较模块,其适于确定当前帧中的像素值与紧邻的前一帧中的相应像素的像素值相匹配的感兴趣区域中的像素数。 固定物体检测模块还包括背景识别模块,其适于基于其像素值与背景像素值的比较来识别形成背景的一部分的当前帧中的感兴趣区域中的那些像素。 所述系统还包括用于当折扣当前帧中的当前帧和前一帧之间的匹配数目超过阈值时产生用于指示静止对象的检测的信号的装置,所述当前帧中的那些像素被识别为是 背景。