VIDEO SURVEILLENCE SYSTEM FOR DETECTING FIREARMS

摘要

The present invention teaches that a computer system can be taught to analyze a stream of video surveillance imagery for individuals carrying firearms using a machine vision and machine learning system of the cascading classifier type, taught by special methods adapted to the firearm recognition area, in particular, exposure of the trained classifier to pre-categorized firearm images, and may poll a number of types of recognition methods before making a positive firearm recognition.

主权项

1. A surveillance method comprising the steps of:
providing a first video surveillance camera; providing a scene analysis component which receives a video stream from the surveillance camera; providing a movement determination module of the scene analysis component, the movement determination module operative to separate in the video stream foreground features which are dynamic from background features which are static; providing a contour determination module of the scene analysis component, the contour determination module operative to determine the contours of foreground features in the video stream; providing a trained person classifier module of the scene analysis component, the trained person classifier module trained to recognize a person in the foreground video stream; providing a trained gun classifier module of the scene analysis component, the trained gun classifier trained to recognize firearms in the foreground video stream; operating the video surveillance camera to provide the video stream to the scene analysis trained classifier, which monitors the video stream on a continuous real-time basis, the movement determination module providing to the contour determination module foreground features, the contour determination module providing to the trained person classifier and to the trained gun classifier modules contours of foreground objects; the trained person identifier providing identification of detected persons, the trained gun classifier providing identification of detected firearms associated with detected persons; the scene analysis component providing positive recognition of a gunman/firearm in response to identification of detected firearms associated with detected persons; the trained classifier, upon obtaining a positive recognition of a gunman/firearm, initiating a response.