engleski

Analysis of the DFT-based Watermarking Method for Image Steganography

The motivation for the research in this paper is gathering valuable information to develop a DFT based steganographic method using an existing DFT-based watermarking technique. Specifically, different image dimensions will be tested to find out how the difference in dimension affects the ability to decode a watermark from an image successfully. The goal is to determine the smallest possible image dimension that still produces successful decoding. Determining that image dimension is critical to examine to develop a steganographic method with the highest capacity possible. Several experiments are conducted to draw conclusions in terms of image quality, detection rate, and robustness. In this research, tests have been conducted in the digital domain exclusively. The results show that image dimensions play a critical role in watermark detection, and further development of the method is needed in order to be able to use images of smaller dimensions. The watermarking method showed robustness for several image attacks and showed enhanced performance when specific filters are applied on images.

image steganography ; digital image watermarking ; robustness ; image quality ; image attacks

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