2-D/3-D recognition and tracking algorithm for soccer application

摘要

A method is provided for deriving three-dimensional camera viewpoint information from a two-dimensional video image of a three-dimensional venue captured by a camera. The method includes the steps of identifying a two-dimensional geometric pattern in the two-dimensional video image, measuring the two-dimensional geometric pattern, and calculating the three-dimensional camera viewpoint information using the measurements of the two-dimensional geometric pattern. The two-dimensional geometric pattern may be an ellipse that corresponds to a circle in the three-dimensional venue, such as the center circle in a soccer field. The three-dimensional camera viewpoint information is provided to a tracking program, which uses the information to track the two-dimensional geometric pattern, or other objects, in subsequently-captured video images.