Patent Portfolio

DIGITAL WATERMARKS AND TRADING CARDS

6,735,324

PROGRESSIVE WATERMARK DECODING ON A DISTRIBUTED COMPUTING PLATFORM

6,724,914

DIGITAL WATERMARKING OF PHYSICAL OBJECTS

6,724,912

LOW VISIBILITY WATERMARKS USING AN OUT-OF-PHASE COLOR

6,721,440

WAVELET BASED FEATURE MODULATION WATERMARKS AND RELATED APPLICATIONS

6,714,683

EXTRACTING DIGITAL WATERMARKS USING LOGARITHMIC SAMPLING AND SYMMETRICAL ATTRIBUTES

6,704,869

APPLYING DIGITAL WATERMARKS USING DOT GAIN CORRECTION

6,700,995

METHODS FOR DETERMINING CONTENTS OF MEDIA

6,694,042

HALFTONE WATERMARKING AND RELATED APPLICATIONS

6,694,041

WATERMARKING RECURSIVE HASHES INTO FREQUENCY DOMAIN

6,683,966

METHOD AND SYSTEM FOR RECOGNIZING SECURITY DOCUMENTS

6,674,886

WATERMARKING IN THE TIME-FREQUENCY DOMAIN

6,674,876

IMAGE MANAGEMENT SYSTEMS AND METHODS USING DIGITAL WATERMARKS

6,664,976

WATERMARKED BUSINESS CARDS AND METHODS

6,650,761

METHODS AND SYSTEMS USING MULTIPLE WATERMARKS

6,636,615

PERCEPTUAL MODELING OF MEDIA SIGNALS BASED ON LOCAL CONTRAST AND DIRECTIONAL EDGES

6,633,654

PERCEPTUAL MODELING OF MEDIA SIGNALS BASED ON LOCAL CONTRAST AND DIRECTIONAL EDGES

6,631,198

STOCHASTIC SCANNING DOCUMENTS TO CHANGE MOIRE EFFECTS

6,631,015

METHOD AND APPARATUS FOR ENCODING PAPER WITH INFORMATION

6,608,919

DIGITALLY WATERMARKING HOLOGRAMS FOR USE WITH SMART CARDS

6,608,911

MULTI-CARRIER WATERMARKS USING CARRIER SIGNALS MODULATED WITH AUXILIARY MESSAGES

6,594,373

COLOR ADAPTIVE WATERMARKING

6,590,996

QUANTIZATION-BASED DATA HIDING EMPLOYING CALIBRATION AND LOCALLY ADAPTIVE QUANTIZATION

6,580,809

WATERMARK-BASED OBJECT LINKING AND EMBEDDING

6,577,746

METHODS FOR EVIDENCING ILLICIT USE OF A COMPUTER SYSTEM OR DEVICE

6,549,638