Patent №
US 7,366,301
Granted
2008-04-29
Filed 2001
Owner
TRUSTCOPY PTE LTD.
Lab
—
AI components
1
hardware
Assignment
Recorded
Dataset
AIPD
2023_r1 edition
Application
09810971
A multiple-layered watermark is generated to be placed on document, to protect against counterfeiting and forgery. Hidden information embedded into each of the watermark's layers is only detectable by using a corresponding decoder. Because of the multiple-layered structure, it is difficult to reverse engineer the optical watermark. The generalized watermark structure significantly increases the “key space” of the decoder.
AI classification
AI hardware0.62
Evolutionary computation0.17
Vision0.03
Knowledge representation0.02
Machine learning0.00
Speech0.00
Planning0.00
Natural language0.00
Ownership
TRUSTCOPY PTE LTD.
assignment · 116290670
Assignors
SHENG, HUANG, KANG, WU JIAN
On an employer assignment, the assignors are typically the inventors.