Method and apparatus for logo hiding in images
US6201879A · kind A · utility
92Cited by
27References
87Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 9, 1996 |
| Grant date | Mar 13, 2001 |
| Priority date | — |
| Expiry date | Feb 9, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2201/0051
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.