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 Title: |
US5870499:
Method and apparatus for data hiding in images
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Bender, Walter; Auburndale, MA
Morimoto, Norishige; Tokyo, Japan
Gruhl, Daniel; Cambridge, MA
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| Assignee: |
Massachusetts Institute of Technology, Cambridge, MA
other patents from MASSACHUSETTS INSTITUTE OF TECHNOLOGY (357270) (approx. 2,706)
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| Published / Filed: |
1999-02-09
/ 1997-11-17
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| Application Number: |
US1997000971586
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| IPC Code: |
Advanced:
G06T 1/00;
H04N 1/32;
Core:
more...
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| ECLA Code: |
G06T1/00W; H04N1/32C19B3; T04N201/32C4D; T04N201/32C6B; T04N201/32C19B3B; T04N201/32C19B3E;
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| U.S. Class: |
Current:
382/232;
380/054;
Original:
382/232;
380/054;
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| Field of Search: |
382/232,260,261
283/073
380/054,18,46
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| Priority Number: |
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| Abstract: |
A method of hiding a pattern in a host image increases and decreases parameter values at randomly selected host image locations assigned to respective first and second groups. The alteration modifies the statistical behavior of a test statistic equivalent to a linear combination of a large number of instances of respective functions, associated with the pattern, of the parameter values at first and second group locations. The presence or absence of the pattern in a test image is determined by comparing the experimental value of the test statistic associated with the pattern with the expected value of the same sum for an unaltered host image.
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| Attorney, Agent or Firm: |
Cesari and McKenna, LLP ;
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| Primary / Asst. Examiners: |
Mancuso, Joseph; Johnson, Timothy M.
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| INPADOC Legal Status: |
None
Family Legal Status Report
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| Parent Case: |
This application is a continuation of Ser. No. 08/599,254, filed Feb. 9, 1996, now U.S. Pat. No. 5,689,587, issued Nov. 18, 1997.
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| Family: |
Show 2 known family members
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First Claim:
Show all 24 claims |
What is claimed is:
1. A method of embedding data in an image encoded as points, each point having a parameter value, the method comprising the steps of:
- a. generating an ordered series of pseudo-random numbers;
- b. assigning each pseudo-random number of the series to a first or a second group;
- c. associating each pseudo-random number with a point;
- d. designating each point associated with a pseudo-random number assigned to the first group to be a first point each point associated with a pseudo-random number assigned to the second group to be a second point; and
- e. altering the image by
- i. increasing the parameter value of at least some first points and of a first patch of points surrounding each of the at least some first points and
- ii. decreasing the parameter value of at least some second points and of a second patch of points surrounding each of the at least some second points, thereby embedding data in the image.
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| Background / Summary: |
Show background / summary
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| Drawing Descriptions: |
Show drawing descriptions
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| Description: |
Show description
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| Forward References: |
Show 11 U.S. patent(s) that reference this one
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