A system for generating correction factor data that is representative of the distortion characteristics of a cathode ray tube. The correction factor data is stored with a cathode ray tube to allow later alignment of a video signal, or can be provided on a storage medium or on a network. Distortion data,...http://www.google.fr/patents/US6014168?utm_source=gb-gplus-shareBrevet US6014168 - Screen mapping of a cathode ray tube