Steganographic method based on wavelets and center weighted median filter
Francisco Javier Gallegos-Funes, Blanca E. Carvajal-Gámez, José Luis López-Bonilla, Volodymyr I. Ponomaryov · 2010
In this paper, we present a robust steganographic method for hidden information in the wavelet domain. The proposed method uses the Iterative Center Weighted Median (ICWM) algorithm to estimate the noisy areas of an RGB image. We propose to use the noisy pixels or areas as places to hidden information to provide good invisibility and fine detail preservation of processed images. The proposed method consistently identifies if the wavelets coefficients of an image contains noisy or not, this algorithm works with variances and standard deviations of the same wavelet coefficients of image.