The invention relates to identification documents, and in particular to pre-printing processing covert images, such as UV or IR images, provided on such identification documents. In one implementation, the invention includes a method of processing a digital image that is to be printed on a surface of...http://www.google.com.au/patents/US7815124?utm_source=gb-gplus-sharePatent US7815124 - Image processing techniques for printing identification cards and documents
Image processing techniques for printing identification cards and documents
