×

Steganographic image processing

  • US 6,757,406 B2
  • Filed: 01/10/2001
  • Issued: 06/29/2004
  • Est. Priority Date: 11/18/1993
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method of encoding a digital image to permit its later identification, the image comprising plural pixels, the method comprising:

  • receiving an N-bit data string to be embedded in the image, N being at least two, the string comprising bits having first and second values, one of said values being “

    1” and

    the other of said values being “

    0”

    ;

    if the first bit of the string has the first value, making a corresponding change to the image, said change being essentially imperceptible to a human viewer of the image, but if the first bit of the string has the second value, making no corresponding change to the image;

    performing the aforesaid step for the second through Nth bits of the string.

View all claims
  • 7 Assignments
Timeline View
Assignment View
    ×
    ×