… DWT-DCT coefficients against the average DWT-DCT coefficients. The impact of DWT-DCT
coefficients was used to generate an adaptive scaling factor for embedding watermark. This …

… scaling factor for selected DCT coefficients in image watermarking. The image blocks that
have … The optimal scaling factors for selected DCT coefficients on the middle frequencies are …

… a novel blind watermarking algorithm in DCT domain using the correlation between two
DCT coefficients of adjacent blocks in the same position. One DCT coefficient of each block is …

… To embed the watermark bits in the DCT blocks, we calculate the difference between the
DCT coefficients of the adjacent blocks. The difference is denoted as “Diff.” Note that are four …

… In this paper a new watermarking algorithm for digital images is presented: the method, … set
of DCT coefficients. After embedding, the watermark is adapted to the image by exploiting the …

… image signed with a certain watermark S k and that we try to detect another watermark S, in
this image… uncompressing the watermarked image, we assume that the DCT coefficients are …

… effect of the DCT coefficients on digital watermarking system is … a better understanding of
DCT coefficients is obtained. The … with size of 8×8 is commonly used in image watermarking. …

… image watermarking algorithm in YCbCr color space and DCT domain is proposed that uses
coefficients … of DCT coefficients, then returning Y component to spatial domain by inverse …

… in grey-level image for copyright protection is proposed. The watermark is embedded into
the host image by modifying DCT coefficients according to absolute value threshold. To …

… watermark robustness, the watermark must be placed in significant parts of the media signal.
In the case of image watermarking, … the DCT coefficients of each segment of the host image. …