Foreground detector for video analytics system
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[0021]Embodiments of the invention presented herein provide a robust background detector for a video analytics system. More specifically, embodiments of the invention provide techniques for generating and maintaining a background model from image data provided by a video stream. As described below, the background detector is generally configured to generate a background model of a scene captured in recorded video. The background model includes a background image which has color channel (e.g., RGB) values or grayscale brightness values for each pixel in the background image. When a new frame is received, the background detector evaluates pixels to determine whether, in that frame, a pixel depicts an element of background or foreground. Once determined, the background detector may create a background / foreground (BG / FG) mask corresponding to the frame. For example, the BG / FG mask may depict every pixel of foreground as white (e.g., 255 in an 8-bit grayscale) and every pixel of backgrou...
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