Imperceptible and Robust Digital Image Watermarking Techniques in Frequency Domain
نویسندگان
چکیده
The digital watermarking provides the protection against the digital data copying, proceeding distributing among the unauthorized users using easily available software. This paper gives the comparative analysis of digital image watermarking in frequency domain. The parameters used to test the robustness and transparency of the watermarking algorithm are Normalized crosscorrelation coefficient (ρ) and Peak Signal to Noise Ratio (PSNR). Also, Robustness of watermarking algorithm is tested for various attacks including salt and pepper noise and Gaussian noise, sharpened and contrast adjustment. The experimental results show that the frequency domain method is more robust against different kinds of attacks and the watermarked image has good
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