THE INFLUENCE OF NOISE CORRUPTION TO IMAGE WATERMARKING IN DCT DOMAIN

Rastislav Lukáč - Marek Čandík

   In this paper we propose some results from noise corruption of digital watermarked images. The discrete cosine transformation (DCT) domain was used for embedding a watermark into the image. The quality of extracted watermarks was tested through subjective criteria and two well-known objective criteria such as the mean absolute error (MAE) and the mean square error (MSE). We have focused on the influence of Gaussian noise and impulse noise on the quality of extracted watermarks and also on the influence of some filters that were used to suppress the proposed corruption.

Keywords: digital watermarking, DCT, noise corruption, Gaussian noise, impulse noise, digital filters, average filter, L-filter, median filter, adaptive LUM FTC filter

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