Method of embedding color information in printed documents using watermarking
AssigneeXerox Corporation
InventorsZhigang Fan, Shen-ge Wang, Hui Cheng
Life of this patent
Estimating the term…
Abstract
A method for enhancing color fidelity in multi-reproduction, includes scanning an image to be reproduced, wherein the image contains an invisible digital watermark including color information; decoding the color information contained in the watermark; comparing the decoded color information with the scanned image; generating a correction table from the differences between the decoded color information and the scanned image; and performing color correction on the scanned image using the correction table. This method confines the color error to one generation, even when copies go through multiple reproduction.
Claims6
A method for enhancing color fidelity in multi-reproduction, comprising:
- scanning an image to be reproduced, wherein the image contains a digital watermark including color information;
- decoding the color information contained in the watermark;
- comparing the decoded color information with the scanned image;
- generating a correction table from the differences between the decoded color information and the scanned image;
- and
- performing color correction on the scanned image using the correction table.
Dependencies are inferred from the claim text.