A BLIND COLOR WATERMARKING TECHNIQUE BASED ON QUATERNION COMPLEX STRUCTURE-PRESERVING QR DECOMPOSITION

The color image blind watermarking technique is widely used in the field of digital image processing and security and can maintain the copyright of images and guarantee their authenticity. In order to maintain the intrinsic connection between the three color channels of color images, using quaternion algebra to solve the color image problems often achieves better results. This paper proposes a complex structure-preserving algorithm for solving the QR decomposition of quaternion matrices, which has better computational efficiency compared with previous methods. This paper also applies the proposed algorithm to the color image blind watermarking technique, and experiments prove that the method has better invisibility and better robustness to salt and pepper noise, etc. The technique will have potential applications in the field of color image watermarking.