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 Title: |
US6201879:
Method and apparatus for logo 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: |
2001-03-13
/ 1996-02-09
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| Application Number: |
US1996000594884
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| IPC Code: |
Advanced:
G06T 1/00;
Core:
more...
IPC-7:
G06K 9/00;
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| ECLA Code: |
G06T1/00W6; G06T1/00W2;
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| U.S. Class: |
Current:
382/100;
Original:
382/100;
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| Field of Search: |
382/232,284
395/135
358/454,448,142,124,450
380/004,23,25,54
283/006,93,94
348/475
235/494
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| Priority Number: |
| 1996-02-09 |
US1996000594884 |
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| Abstract: |
A method of hiding a figure in an image replaces information from a figure-shaped portion of the image with information from another location having similar texture. The relative insensitivity of the eye to discontinuities in texture patterns having a significant high-frequency or random component minimizes the perceptibility of the replacement. The figure is revealed by autocorrelating the image containing the repeated information, and subtracting the image from a copy of itself shifted according to the arguments creating large value of the autocorrelation function.
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| Attorney, Agent or Firm: |
Testa, Hurwitz & Thibeault LLP ;
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| Primary / Asst. Examiners: |
Couso, Jose L.;
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| INPADOC Legal Status: |
Show legal status actions
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| Family: |
None
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First Claim:
Show all 87 claims |
What is claimed is:
1. A method of embedding an imperceptible figure in an original image encoded as points, each of which has a parameter value, the image having fields over which the arrangement of parameter values generates texture patterns, the method comprising the steps of:
- a. identifying an encoding field in the original image, the encoding field having a continuous texture pattern;
- b. identifying in the encoding field a source portion at an original location and a target portion at a target location, the target portion not overlapping the source portion, both portions being shaped like the figure; and
- c. generating an altered image having identical source and target portions by copying the source portion over the target portion so as to replace parameter values in the target portion with a repeated pattern segment, thereby embedding the figure.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 31 U.S. patent(s) that reference this one
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