| 摘要 |
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.
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