Performance Evaluation of Key for Watermarking Using 2-D Wavelet Transformations

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The digital watermark technology is now drawing attention as a useful method of protecting copyrights of digital contents such as audio, image, and video. Especially, efficient image watermarking methods have been developed in the DWT (Discrete Wavelet Transform) domain. With the rapid development of ecommerce and internet technology, the applications of multimedia products (image, video and audio, etc.) are widely spread. Meanwhile the issue on the security of the copyright has been receiving more and more attention recently. Watermarking technology is an effective way to protect digital multimedia products by embedding a watermark into the target product to prove the owner's right on the product.