Surveillance video camera enhancement system
First Claim
1. A surveillance method comprising detecting a scene to be surveilled with a video camera, processing the resulting video to detect moving objects in the detected scene, distinguishing objects undergoing unexpected motion from objects undergoing expected motion and highlighting the objects undergoing expected motion.
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Abstract
In a video camera surveillance system, a video processor determines dense motion vector fields between adjacent frames of the video. From the dense motion vector fields moving objects are detected and objects undergoing unexpected motion are highlighted in the display fo the video. To distinguish expected motion from unexpected motion, dense motion vector fields are stored representing expected motion and the vectors representing the moving object are compared with the stored vectors to determine whether the object motion is expected or unexpected. In an alternative embodiment, the video surveillance system comprises a panning camera and the frames of the video are arranged in a mosaic. Object motion in the video is detected by means of dense motion vector fields and the predicted position of objects in the mosaic is detected based on the detected object motion. The position of moving objects in the current frame being detected by the panning camera is compared with the predicted position of the objets in the mosaic and if the positions are substantially different, the corresponding object is tagged and highlighted as undergoing unexpected motion. A system is also disclosed for using the dense motion vector fields to control the motion of the panning camera to follow a moving object.
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Citations
18 Claims
- 1. A surveillance method comprising detecting a scene to be surveilled with a video camera, processing the resulting video to detect moving objects in the detected scene, distinguishing objects undergoing unexpected motion from objects undergoing expected motion and highlighting the objects undergoing expected motion.
- 5. A surveillance method comprising detecting a scene to be surveilled with a video camera, detecting dense motion vector fields representing the motion of image elements from frame to frame in the video produced by said video camera, identifying moving objects depicted in said video by means of said dense motion vector fields and displaying said video with the identified moving objects highlighted in the display of said video.
- 7. A surveillance method comprised of panning a video camera to detect a scene, combining the frames of the resulting video into a mosaic representing a panoramic view of said scene, detecting the motion of moving objects in said scene, determining the predicted position of objects in said scene determined from the detected motion of said objects, and updating the position of said moving objects in accordance with the predicted motion of said moving objects in said mosaic.
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10. A method of making a video of a moving object comprising detecting a scene containing said moving object, with a video camera to produce a video depicting said moving object, generating dense motion vector fields representing the motion of image elements from frame to frame in said video, determining the motion of said moving object from said dense motion vector field, predicting the immediate future position of said moving object from the detected motion of said moving object, and controlling the motion of said video camera in accordance with the predicted immediate future position of said moving object to maintain the moving object centered in the frame currently being detected by said video camera.
- 11. A surveillance system comprising a video camera arranged to detect a scene to be survielled, a video processor operable to detect moving objects in the video produced by said video camera and to distinguish objects undergoing unexpected motion from objects undergoing expected motion and to highlight the objects undergoing unexpected motion, and a display device connected to receive the processed video from the video processor to display the processed video with the objects undergoing unexpected motion highlighted.
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15. A surveillance system comprising a video camera arranged to detect a scene to be surveilled to produce a video of said scene, a video processor connected to receive said video and operable to detect dense motion vector fields representing the motion of image elements from frame to frame in said video and to identify moving objects depicted on said video by means of said dense motion vector fields, and to highlight in said video a detected moving object by magnifying the display of the moving object and the area around moving object, and a video display device connected to receive the processed video from said video processor and to display the processed video with the moving object and the area around the moving object being magnified.
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16. A surveillance comprising a panning video camera arranged to detect a surveilled scene, a video processor connected to receive the video produced by said video camera and operable to combine the frames of said video into a mosaic representing a panoramic view of said scene, to detect the motion of moving objects in said scene, to determine the predicted position of objects in said scene determined from the detected motion of said objects and to update the position of said moving objects in said video in accordance with the predicted motion of said objects in said mosaic, and a video display device connected to receive the video processed by said video processor and to display said mosaic as a panoramic view of the surveilled scene with the moving objects depicted in their predicted positions.
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18. A video system comprising a panning video camera a video processor connected to receive the video produced by said panning video camera and operable to generate dense motion vector fields representing the motion of image elements from frame to frame in the video produced by said video camera, to determine the motion of any depicted moving object in said video from said dense motion vector fields, and to predict the immediate future position of said moving object from the detected motion of said moving object, a controller for controlling the motion of said video camera, said video processor controlling said controller to control the motion of said video camera in accordance with the predicted immediate future position of said moving object to maintain the moving object centered in the frame currently being detected by said video camera.
Specification