Jung Hee Seo , Hung Bog Park

The KIPS Transactions:PartB , Vol. 12, No. 3, pp. 291-300, Jun. 2005
10.3745/KIPSTB.2005.12.3.291,   PDF Download:

Abstract

We are required to adequately adjust the distributed contents to each device and users'' demands on the network and to obtain authentication of ownership for our information to prevent the illegal usage of our digital information by non-owners. In this paper, we propose scalable digital watermarking of contents within a compression domain based on Orthogonal Forward Wavelet Transforms, and the proposed method focuses on robust watermark algorithms that are not visually recognizable to embedded ownership information. Therefore, it proposes a watermark insertion methods based on spread spectrum techniques and provides a watermark key. As a result, it not only extracted the contained watermark from the intentionally altered images, but also secured the watermark information extraction from partial images and ensure the decrease of BER (Bit Error Rate) in the images containing watermarks even when more watermark inserted images are transmitted.

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