| |
 |
|
Class Information
Number: 380/54
Name: Cryptography > By modifying optical image (e.g., transmissive overlay)
Description: Subject matter which changes the visible appearance of an object so as to encrypt visible markings, or to decode the appearance of the object into intelligible visible markings.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7615735 |
Random number generation using a scattering waveguide |
Nov. 10, 2009 |
| 7616764 |
Online data encryption and decryption |
Nov. 10, 2009 |
| 7617398 |
Derivation and quantization of robust non-local characteristics for blind watermarking |
Nov. 10, 2009 |
| 7606388 |
Contents border detection apparatus, monitoring method, and contents location detection method and program and storage medium therefor |
Oct. 20, 2009 |
| 7590239 |
Object identifying medium using multi-layer thin-film |
Sep. 15, 2009 |
| 7568103 |
Derivation and quantization of robust non-local characteristics for blind watermarking |
Jul. 28, 2009 |
| 7564973 |
Digital watermark embedding device and digital watermark embedding method |
Jul. 21, 2009 |
| 7565327 |
Copyright detection and protection system and method |
Jul. 21, 2009 |
| 7561716 |
Watermarking method and apparatus |
Jul. 14, 2009 |
| 7555129 |
Content playback apparatus, content playback method, and program |
Jun. 30, 2009 |
| 7555647 |
Encoding device, decoding device, encoding method, decoding method, and program therefor |
Jun. 30, 2009 |
| 7555650 |
Techniques for reducing the computational cost of embedding information in digital representations |
Jun. 30, 2009 |
| 7549052 |
Generating and matching hashes of multimedia content |
Jun. 16, 2009 |
| 7545541 |
Systems and methods for embedding metadata in a color measurement target |
Jun. 9, 2009 |
| 7543154 |
Method and device for determining an access code |
Jun. 2, 2009 |
| 7542584 |
Image processing method, image processing apparatus, program and recording medium that can reduce image quality degradation |
Jun. 2, 2009 |
| 7532740 |
Method and apparatus for embedding auxiliary information within original data |
May. 12, 2009 |
| 7512237 |
Encryption for optical communications using dynamic subcarrier multiplexing |
Mar. 31, 2009 |
| 7508939 |
Image processing system and method for processing image data using the system |
Mar. 24, 2009 |
| 7496209 |
Techniques and systems for embedding and detecting watermarks in digital data |
Feb. 24, 2009 |
| 7489798 |
Method and apparatus for detecting a watermark in a signal |
Feb. 10, 2009 |
| 7489797 |
Method and apparatus for fragile watermarking |
Feb. 10, 2009 |
| 7487355 |
Data processing apparatus and method |
Feb. 3, 2009 |
| 7471806 |
Method, apparatus and computer program for inserting a watermarking program into an image processing program |
Dec. 30, 2008 |
| 7461255 |
Digital watermark processing apparatus, and digital contents distribution system using the apparatus |
Dec. 2, 2008 |
| 7447312 |
Method and apparatus for secure ultrafast communication |
Nov. 4, 2008 |
| 7440584 |
System and method for marking data and document distribution |
Oct. 21, 2008 |
| 7411702 |
Method, apparatus, and computer program product for embedding digital watermark, and method, apparatus, and computer program product for extracting digital watermark |
Aug. 12, 2008 |
| 7397928 |
Insertion and extraction of a message in an image |
Jul. 8, 2008 |
| 7391529 |
Apparatus and method for managing and using reusable document components during the process of dynamic document construction |
Jun. 24, 2008 |
| 7389421 |
Countermeasure against estimation-based attacks of spread-spectrum watermarks |
Jun. 17, 2008 |
| 7386149 |
Method and apparatus for embedding digital-watermark using robustness parameter |
Jun. 10, 2008 |
| 7372965 |
Electric circuit management method and device |
May. 13, 2008 |
| 7369659 |
Item handling system |
May. 6, 2008 |
| 7366301 |
Optical watermark |
Apr. 29, 2008 |
| 7362860 |
Image data encryption method, image data transform method, apparatus for the methods, computer program, and computer-readable storage medium |
Apr. 22, 2008 |
| 7343024 |
Embedding data in material |
Mar. 11, 2008 |
| 7333628 |
Data embedding with multi-level screening |
Feb. 19, 2008 |
| 7330974 |
Method and system for delivery of a secure document |
Feb. 12, 2008 |
| 7318158 |
Derivation and quantization of robust non-local characteristics for blind watermarking |
Jan. 8, 2008 |
| 7318157 |
Derivation and quantization of robust non-local characteristics for blind watermarking |
Jan. 8, 2008 |
| 7315621 |
Digital watermark-embedding apparatus, digital watermark-embedding method, and recording medium |
Jan. 1, 2008 |
| 7305089 |
Picture taking apparatus and method of controlling same |
Dec. 4, 2007 |
| 7302078 |
Apparatus and method for preventing illegal distribution of digital contents by using a fingerprinting technique |
Nov. 27, 2007 |
| 7302577 |
Data processing apparatus and method |
Nov. 27, 2007 |
| 7302162 |
Modulation of a video signal with an impairment signal to increase the video signal masked threshold |
Nov. 27, 2007 |
| 7295678 |
Method for inserting binary messages in a digital image |
Nov. 13, 2007 |
| 7286684 |
Secure document design carrying auxiliary machine readable information |
Oct. 23, 2007 |
| 7277557 |
Image processing apparatus, image processing method, and storage medium of image processing program |
Oct. 2, 2007 |
| 7231049 |
Electronic mailing system |
Jun. 12, 2007 |
|
|
|
