2-D/3-D RECOGNITION AND TRACKING ALGORITHM FOR SOCCER APPLICATION

摘要

A method is provided for deriving three-dimensional camera viewpointinformation from a two-dimensional video image of a three-dimensional venuecaptured by a camera. The method includes the steps of identifying a twodimensional geometric pattern in the two-dimensional video image, measuringthe two-dimensional geometric pattern, and calculating the three-dimensionalcamera viewpoint information using the measurements of the two-dimensionalgeometric pattern. The two-dimensional geometric pattern may be an ellipsyethat corresponds to a circle in the three-dimensional venue, such as thecenter circle in a soccer field. The three-dimensional camera viewpointinformation is provided to a tracking program, which uses the information totrack the two-dimensional geometric pattern, or other objects, in subsequently-captured video images.