Method for embedding digital information in an image

Image analysis – Applications – Personnel identification

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382203, 382279, 382284, 358456, G06K 900, G06K 936, G06K 964

Patent

active

058599207

ABSTRACT:
A method of embedding digital data in a source image includes the steps of: a) generating a multi-level data image representing the digital data; b) convolving the multi-level data image with an encoding carrier image to produce a frequency dispersed data image; and c) adding the frequency dispersed data image to the source image to produce a source image containing embedded data. The data is recovered from the image by: a) cross correlating the source image containing embedded data with a decoding carrier image to recover the data image; and b) extracting the digital data from the recovered data image.

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