Secure and Robust Color Image Watermarking for Copyright Protection Based on Lifting Wavelet Transform

This paper presents a secure and robust color image watermarking algorithm for copyright protection. This method uses lifting wavelet transform (LWT) to decompose both the host image and the watermark into different sub-bands and performs watermark embedding in the transform domain. A security key is introduced in the algorithm for security purpose. Two color images are used to test the performance of the proposed algorithm. Results show that the proposed watermarking scheme not only has good imperceptibility and but also are robust to various geometric and image processing attacks.