US7818577B2 - Identifying material using a watermark and a signature - Google Patents
US7818577B2 - Identifying material using a watermark and a signature - Google Patents …

US PATENT DOCUMENTS 2002.0068987 A1 6/2002 Hars 2002fO069107 A1 6, 2002
Werner 5,640,193 A 6, 1997 Wellner 2002/0069218 A1 6/2002 Sull et al................. T15 …

6,614,914 B1 9, 2003 Rhoads et al. 6,636,615 B1 10/2003 Rhoads et al. 6,694,041 B1
2/2004 Brunk 6,724.912 B1 4/2004 Carr et al. 6,748,533 B1 6, 2004 Wu et al. 6,754,377 B2 …

US8918326B1 - Feedback and simulation regarding detectability of a watermark message -
Google Patents US8918326B1 - Feedback and simulation regarding detectability of a watermark …

0001. This application is a continuation-in-part of US patent application Ser. No. 09/960,228,
filed Sep. 20, 2001. The Ser. No. 09/960,228 application is a continuation-in part of US …

4,464,656 4497, 060 4,512,013 4,547,804 4,564,862 4,593.904 4,639,779 4,669,089
4,677.466 4,686,707 4,703,476 4,706,282 4,723,302 4,729,398 4,739,398 4,750,173 …

The present invention relates to embedding a document with multiple watermark
components at different printing stages. A document is preprinted to include a first digital …

Related US Application Data 5,478,990 A 12/1995 Montanari et al.(63) Continuation of
application No. 09/545,589, filed on 5,479.210 A 12/1995 Cawley et al. Apr. 7, 2000, now …

Whigh is a congilnua'? on_in'_ art of'a l'ica'? on'NO'objects With machine behaviors.
Machine behaviors refer to 09643 104? led on Jun 29p 1999 “23Gb is a Con; actions by …

(57) ABSTRACT A watermark is embedded in a document having a plurality of pages. The
pages of the document are analyzed to produce watermark information, which indicates …