Resources Contact Us Home
Protection method for preventing hard copy of document from being released or reproduced

Image Number 9 for United States Patent #8085972.

A protection method for preventing a hard copy of a document from being released or reproduced is provided. The protection method comprises: selecting a pattern with a closed contour line and utilizing a level set method to process the pattern to generate at least a watermark; and embedding the watermark into the document. In addition, the protection method can further comprise: detecting the hard copy of the document to determine whether at least a watermark exists in the hard copy of the document; and forbidding releasing or reproducing the document when the watermark is detected in the hard copy of the document.

  Recently Added Patents
Resist composition, method of forming resist pattern, novel compound, and acid generator
Image contrast enhancement in depth sensor
Continuous low-temperature process to produce trans-1-chloro-3,3,3-trifluoropropene
Safety controller and safety control method
Methods of removing dummy fin structures when forming finFET devices
Mobile multi-network communications device
Nutritional compositions
  Randomly Featured Patents
Method for detecting a rotation direction in three-phase networks
Digital synthesizer, digital copier and magnification control unit
Method for the production of calendic acid, a fatty acid containing delta-8,10,12 conjugated double bonds and related fatty acids having a modification at the delta-9 position
Separation unit for shipping carton
Transformation of allium sp. with agrobacterium using embryogenic callus cultures
Pyroelectric vidicon having target heating means on accelerating anode
Exhaust gas recirculation system
Loom clip
Control system for an RFID-based system for assembling and verifying outbound surgical equipment corresponding to a particular surgery
Clock speed limiter for a microprocessor by comparing clock signal with a predetermined frequency