Richard Thomas Russell, Graham Alexander Thomas: Position determination. British Broadcasting Corporation, McDermott Will & Emery, April 29, 2003: US06556722 (130 worldwide citation)

In the preferred implementation, the position of an object, for example a studio camera is determined by means of a camera which views several markers disposed about a studio ceiling, the markers being patterened as a series of light and dark rings to encode information in binary form enabling the m ...

Graham Alexander Thomas, Michael Burl: Vector assignment for video image motion compensation. BBC Broadcasting House, George W Neuner, Dike Bronstein Roberts & Cushman, December 21, 1999: US06005639 (22 worldwide citation)

The appropriate one of a list of possible motion vectors is applied to each region of a video image. An image value for that region is determined for each of four successive fields, for each of the possible motion vectors. The values for these four fields are compared and when the values are substan ...

Graham Alexander Thomas, Oliver Grau: Virtual studio system. Venable, Robert Kinberg, Jeffri A Kaminski, December 23, 2008: US07468778 (13 worldwide citation)

A method of providing a visual representation of a scene to a participant in a studio is provided, wherein the studio is arranged to be viewed by a camera to provide a camera image and has at least a portion of a background object arranged to be keyed out of the camera image by a keying process. The ...