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The ease with which digital images can be manipulated with readily available editing tools highlights the critical need for robust copyright protection mechanisms. Digital watermarking tackles this challenge by embedding imperceptible ownership information within images. However, striking a balance between transparency (invisibility of the watermark) and robustness against attacks remains a significant hurdle. This paper proposes a watermarking method that uses the combined strengths of Finite Ridgelet Transform (FRIT) and Bidiagonal Singular Value Decomposition (BSVD). Our approach first pre-processes the image using FRIT to extract prominent features. Subsequently, the watermark is imperceptibly embedded into the singular values obtained from the FRIT coefficients. Our evaluation using standard sample images confirms high visual quality and robustness to attacks for the proposed method.
 

Keywords: digital watermarking, finite ridgelet transform, bidiagonal singular value decomposition

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