DCT VERSUS WHT FOR FRAGILE IMAGE WATERMARKING

Anna Ušáková

   Digital watermarking is nowadays defined to be part of digital signal processing. This paper concerns with a special case of digital watermark, fragile watermark. The presented algorithm uses the DCT or WHT spectral domain for watermark embedding. Comparisons of the advantages of both spectral domains for errors detection are the part of this paper.

Keywords: DCT spectrum, WHT spectrum, JPEG quantization, fragile watermark

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