A watermarking method based on optimizing SSIM index by using PSO in DCT domain
Mohsen Rohani, Alireza Nasiri Avanaki · 2009 14th International CSI Computer Conference · 2009
A watermarking method in DCT domain is modified to achieve better imperceptibility. Particle Swarm Optimization (PSO) is used to find the best DCT coefficients for embedding the watermark sequence and the Structural Similarity Index is used as the fitness function in order to have a watermarked image with the best possible quality.