Patent ID: 7643066
Filing Date: 2010-01-05
Classification: G06K,G06T,G08B,H04N

Abstract:
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; receiving a user input defining a virtual mask in the first image, the virtual mask substantially covering a source of static motion in the first image; 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 wherein the calculating step calculates the second field of view of said camera as a function of time dependent upon the pan, tilt and zoom commands; outputting both the calculated second field of view and a qualification of the second calculated field of view, the qualification providing an indication of the validity of the calculated second field of view based upon a length of time that has elapsed between a time of execution of the pan, tilt and zoom commands and the second point in time; and processing the second image based upon the first field of view and the calculated second field of view, wherein said processing step includes translating the virtual mask to a proper location in the second image so that the virtual mask substantially covers the source of static motion in the second image.