Patent ID: 6081606
Filing Date: 2000-06-27
Classification: G06K,G06T,G08B,H04N

Abstract:
Apparatus for detecting motion within a scene that is represented by a sequence of images, comprising:a flow field generator for processing said sequence of images to produce a motion flow field, wherein said flow field generator comprises an image preprocessor for producing filtered images from said sequence of images and a flow field processor for generating said motion flow field from said filtered images, wherein said image preprocessor comprises an image selector for selecting three images from said sequence of images, a first subtractor for subtracting a first image from a second image to create a first difference image, a second subtractor for subtracting said second image from a third image to create a second difference image, a first filter for filtering said first difference image to produce a first filtered image, and a second filter for filtering said second difference image to produce a second filtered image;a flow field segmentor for extracting said motion flow field from said sequence of images; andan alarm detector for analyzing said motion flow field to determine if said motion flow field meets an alarm criteria.