1 December 2000 Reliable watermark detection method based on analysis of correlation
Author Affiliations +
Optical Engineering, 39(12), (2000). doi:10.1117/1.1327900
A digital watermark is a perceptually unobtrusive signal embedded in a multimedia asset, such as an image, for copyright protection. In many cases watermark detection amounts to thresholding a correlation value between a watermark and a received image. Watermarking detection schemes can be classified into two types. Type 1 is based on a correlation process that is applied to the difference between an original image and an input image to be tested. Type 2 is based on a correlation process that is directly applied to an input image. Type 1 fails to prove the rightful ownership, while type 2 can do so. However, type 2 has a problem that type 1 does not have: The correlation between a watermark and an original image to be watermarked is too significant to be ignored, when it is normalized by the watermark’s energy. In this paper, based on an analysis of the correlation, we propose a novel watermarking scheme to minimize that effect. We verify the performance of the proposed scheme by experiments.
Hyun-Soo Kang, Jae Gark Choi, Si-Woong Lee, Sun-Jae Cho, "Reliable watermark detection method based on analysis of correlation," Optical Engineering 39(12), (1 December 2000). http://dx.doi.org/10.1117/1.1327900

Digital watermarking

Image processing


Signal processing


Optical engineering


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