Image Watermarking Scheme Using Cuckoo Search Algorithm

The work presented in this paper proposes a robust and optimized algorithm to be used in image watermarking. It makes use of cuckoo search algorithm (CSA) for optimization. A binary watermark is embedded within the host images in transform domain using a fitness function. The locations used for inserting the watermark bits are selected using CSA. The fitness function is a linear summation of similarity correlation coefficients SIM(W, Wʹ) obtained for four different operations performed on the watermarked image. The simulation reports indicate that the PSNR values are high enough. As a result, the watermarked images have high visual quality. The values of similarity correlation coefficient show that the scheme presented in this paper is also robust against the said operations. It can be concluded that this CSA-based scheme shows good result and also reports better results than other similar works.