Resources Contact Us Home
Method for concealing data in curves of an image

Image Number 19 for United States Patent #7817817.

A method of concealing data in images imperceptibly alters curves therein, such as through adding a value representing the data to be hidden to each of a number of B-spline control points representing the original curve. The altered control points characterize the imperceptibly altered curve, which replaces the original curve in the image. The altered control points may be later extracted from the image and compared with the original control points to determine the hidden value. Prudent selection of the values altering the control points as well as an iterative alignment-minimization algorithm in the detection process provides protection against numerous techniques for preventing the hidden values from being recovered.

  Recently Added Patents
Method for improving the performance of browser-based, formula-driven parametric objects
Targeting agents for enhancing radiation therapy
Method and system for providing cloud based network security services
Methods, systems and apparatus for displaying the multimedia information from wireless communication networks
Multichannel device utilizing a centralized out-of-band authentication system (COBAS)
Vehicle headlight
Method and system for acquiring support capability of mobile terminal by base station side system
  Randomly Featured Patents
Exposure method and apparatus
Condensed phase conversion and growth of nanorods instead of from vapor
Information processing system having volume guard function
Container with reciprocable dispensing tube
Method for fabricating a capped gate conductor
Semiconductor imaging device and fabrication process thereof
Hose connection adapter
Removing material from surfaces of metals processing chambers
Electrically heatable honeycomb body divided into subregions with additional electrical conductor elements
Semiconductor memory device and method of manufacturing the same