A DFT-DWT Domain Invisible Blind Watermarking Techniques for Copyright Protection of Digital Images

Munesh Chandra, Shikha Pandey

Abstract


In this paper, we have given overview of digital watermarking and proposed a frequency based invisible blind watermarking tech-nique that use DFT Discrete Fourier transform ) and DWT (Discrete Wavelet Transform) transform for copyright protection of digital images. Using these transforms is motivated by good time frequency features and well matching with human visual system directives of wavelet trans-form and averagely distribution of energy of watermarking message in spatial domain after the signal is implemented in DFT. In order for a wa-termark to be useful, it must be perceptually invisible and robust against any possible attack.
In this paper we measured imperceptibility and robustness of the method through parameters, PSNR (Peak Signal to Noise Ratio) and AR (Accu-racy Rate)

 

Keywords – Digital Watermarking, DFT, DWT, Copyright Protection


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DOI: https://doi.org/10.26483/ijarcs.v1i2.49

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