Performance Evaluation of Image Watermarking Techniques

In this paper, we investigate the problem of choosing the best domain for embedding watermarks in digital images. In our investigation, seven image watermarking techniques are implemented and evaluated. The evaluated techniques are selected to represent the different approaches to embedding data in spatial domain, discrete Fourier transform (DFT) domain, discrete cosine transform (DCT) domain, and discrete wavelet transform (DWT) domain. The algorithms are also chosen to represent a range of computational complexities and implementation structures. The performance of the selected algorithms is evaluated with respect to perceptual quality, execution time, and robustness to common signal processing operations.