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Computation of the Length of Watermarks to be Inserted in the DCT domain for the specified PSNR of Still Image  

권오형 (한국전자통신연구원)
박래홍 (서강대학교)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SP / v.41, no.2, 2004 , pp. 35-40 More about this Journal
Abstract
In this paper, we propose a method for calculation of the length of watermarks to be inserted in the discrete cosine transform (DCT) domain for the specified peak signal to noise ratio (PSNR) of still image. Using the energy relationship of the DCT we derive the equation that directly computes the length of watermarks to be inserted in the DCT domain. Experimental results with several test images show the effectiveness of the proposed method.
Keywords
DCT; watermark; PSNR;
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