Tracking apparatus for use in tracking an object

摘要

Tracking apparatus for use in tracking an object (4), which tracking apparatus comprises identification tag (2) which is for being attached to the object (4) and which comprises at least two colors (6,8) and a boundary (12) therebetween; a filter for filtering out colors except those colors on the identification tag (2); and a detector for detecting the boundary (12) on the identification tag (2) and thereby enabling the detected colors on the identification tag (2) to be identified from background colors (10) that may be the same as those on the identification tag (2).