In the last decade, the invariant quaternion moment-based watermarking methods were successfully used due to their robustness against the geometric attacks. In this chapter, a performance analysis of the invariant quaternion moment-based methods for color image watermarking is presented. An extensive study of the color image watermarking using a set of quaternion moments. In this comparative study, a unified numerically stable method is utilized for computing accurate quaternion color moments in polar coordinates where the angular kernel is computed over circular pixels using analytical integration. The radial kernels are computed using accurate Gaussian quadrature method. In these watermarking methods, better characteristics of the various quaternion moments such as their capabilities in reconstructing high quality watermarked images, computational complexity, accuracy and stability are considered. Moreover, evaluation criteria are selected carefully to evaluate the performance of the watermarking methods in terms of visual imperceptibility and robustness against different attacks. Experiments are performed where the obtained results are used to analyze the performance of the various quaternion moment-based watermarking methods.