The paper describes two methods for digital image watermarking. The first uses the discrete cosine transform together with singular value decomposition, the second uses the discrete wavelet transform together with singular value decomposition. These two methods are compared each other. All results are in the paper.
The paper describes two methods for digital image watermarking. The first uses the discrete cosine transform together with singular value decomposition, the second uses the discrete wavelet transform together with singular value decomposition. These two methods are compared each other. All results are in the paper. (en)