一种基于DCT域的数字水印算法在版权保护中的应用研究

The Study on the Application of DCT-based Digital Watermarking Algorithm in Copyright Protection

阐述了数字文献版权保护技术中基于DCT变换域的数字水印理论和算法,并根据相关理论模型,利用C程序语言实现了该DCT快速变换算法。实践证明,基于DCT变换域的数字水印算法能保证水印的不可见性,并保持较好的鲁棒性,实现了图像载体数字文献的版权保护。

This paper expounds DCT-based digital watermarking theory and algorithm in digital literature copyright protection technologies,and in accordance with the relevant theoretical models,realizes the rapid transformation of the DCT algorithm by adopting C # programming language,the application of which proves that the digital watermarking algorithm based on DCT transforming domain can ensure watermark’s invisibility and maintain better robust,thus realizes the copyright protection of digital document carried by image.