EURion constellation

The EURion constellation is made up of five rings.

The EURion constellation (also known as Omron rings[1] or doughnuts[2]) is a pattern of symbols incorporated into a number of secure documents such as banknotes, cheques, and ownership title certificates designs worldwide since about 1996. It is added to help imaging software detect the presence of such a document in a digital image. Such software can then block the user from reproducing banknotes to prevent counterfeiting using colour photocopiers.

  1. ^ "Glossary of banknotes". www.regulaforensics.com. 1 January 2009. Retrieved 22 December 2014.
  2. ^ Baraniuk, Chris (25 June 2015). "The secret codes of British banknotes". BBC Future. Retrieved 30 June 2015.