AN IMAGE WATERMARKING TECHNIQUE USING POWER SPECTRUM CONDITION

Abstract

In this project, the energy efficient watermarking scheme is explored. The energy efficient watermark has the power spectrum which is same as the power spectrum of the original signal, So, the watermark signal has high resemblance with original signal. In order to be energy efficient, the watermark must satisfy the power spectrum condition according to which the power spectrum of watermark signal is directly proportional to power spectrum of original signal. The watermarks which follow the criteria of power spectrum are more robust as compared to the watermarks which do not fulfill the criteria of power spectrum condition. The watermark which do not satisfy the power spectrum condition are vulnerable to Wiener attacks whereas the watermark which are PSC complaint are highly resist to wiener attacks and the watermark can be recovered with very high perceptibility.