Method, software, and device for hiding data in binary...

Details Method, software, and device for hiding data in binary... Method, software, and device for hiding data in binary...

2008-01-29

2008-01-29

Ahmed, Samir (Department: 2624)

Image analysis

Applications

C380S051000, C370S522000

Reexamination Certificate

active

07324662

ABSTRACT:
A method of embedding watermark data into a two-colour (binary) image includes dividing the image into blocks and assessing the suitability of each block to embed a bit of watermark data by assessing whether or not the flipping of a defined pixel in each block affects the visual attributes of said block in manner to be perceptible by the human eye. Data is only embedded in those blocks determined to be suitable for data embedding, by flipping the defined pixel, as required. A recipient of the document may similarly assess which blocks contain watermark data, by assessing the suitability of each block in the document to embed such data. Conveniently, watermark data may be extracted without further information about the data's location within a document.

REFERENCES:
patent: 6993150 (2006-01-01), Haynes
patent: 2005/0025333 (2005-02-01), Fujii et al.
patent: 2007/0092102 (2007-04-01), Kot et al.
Yu-Chee Tseng and Hsiang-Kuang Pan, “Data Hiding in 2-Color Images,” IEEE Transactions on Computers, vol. 51, No. 7, Jul. 2002, pp. 873-878.
Wu et al. “Data Hiding in Digital Binary Image”, IEEE International Conference on Multimedia and Expo, 2000.
Chen et al., “A secure Data Hiding Scheme for Binary Images”, IEEE Transactions on Communications, Aug. 2000, pp. 1227-1231, vol. 50, No. 8.
Tseng et al., “Secure and Invisible Data Hiding in 2-Color Images”, IEEE Infocom 2001, pp. 887-896.

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