Method and apparatus for producing frame accurate position data in a PTZ dome camera with open loop control
First Claim
Patent Images
1. A method of processing video images, comprising:
- capturing a first image with a camera having a first field of view, said capturing occurring at a first point in time;
transmitting commands to said camera to make pan, tilt and zoom movements;
capturing a second image with said camera at a second point in time, the second point in time being after the movements have commenced;
calculating a second field of view of said camera at the second point in time, said calculating being based upon the commands; and
processing the second image based upon the first field of view and the calculated second field of view.
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Abstract
A method of processing video images includes capturing a first image with a camera having a first field of view. The capturing occurs at a first point in time. Commands are transmitted to the camera to make pan, tilt and zoom movements. A second image is captured with the camera at a second point in time. The second point in time is after the movements have commenced. A second field of view of the camera is calculated at the second point in time. The calculating is based upon the commands. The second image is processed based upon the first field of view and the calculated second field of view.
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Citations
20 Claims
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1. A method of processing video images, comprising:
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capturing a first image with a camera having a first field of view, said capturing occurring at a first point in time;
transmitting commands to said camera to make pan, tilt and zoom movements;
capturing a second image with said camera at a second point in time, the second point in time being after the movements have commenced;
calculating a second field of view of said camera at the second point in time, said calculating being based upon the commands; and
processing the second image based upon the first field of view and the calculated second field of view. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A video system comprising:
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a video camera including an image-capturing device configured to capture images, each captured image associated with a field of view of said camera;
a display device configured to display the images captured by said camera;
an actuating device configured to cause said camera to execute pan, tilt and zoom commands to thereby change the field of view of said camera;
a camera module configured to automatically produce camera zoom position information based upon the zoom commands; and
a processing device operably coupled to said camera and to said display device wherein said processing device receives images captured by said camera, said processing device being operable to calculate the field of view of said video camera based upon the pan commands, the tilt commands, and the camera zoom position information. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A video system comprising:
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a video camera including an image-capturing device configured to capture images, each captured image associated with a field of view of said camera;
a display device configured to display the images captured by said camera;
an actuating device configured to cause said camera to execute pan, tilt and zoom commands to thereby change the field of view of said camera; and
a processing device operably coupled to said camera and to said display device wherein said processing device receives images captured by said camera, said processing device being operable to calculate the field of view of said video camera as a function of time dependent upon the pan, tilt and zoom commands, and to output both the calculated field of view and a qualification of the calculated field of view, the qualification being based upon a point in time associated with the calculated field of view. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification