Study of high performance information hiding scheme based on CL multi-wavelet and annulus sector analysis

Using first-order transformation of CL multi-wavelet, carrier image is decomposed into four components of lowest resolution sub-image. These four components are processed by ASA (Annulus Sector Analysis) to obtain embedding areas. Information hiding follows two rules: First, satisfies four components energy distributed feature of CL multi-wavelet first-order sub-images. That means embedding robust parameters in LL 1, embedding the same pre-hiding information in LH 1 and HL 1, embedding fragile identifier in HH 1. Second, use two or more annulus to embed data symmetrically. Moreover, using Chebyshev chaotic map and genetic algorithm to adjust sequence of embedded data and LSB is checked by other bit plane. Experimental results show that the invisibility of this scheme is of 8.75% average increase and excellent perception to distortion. Robustness is improved by 29.24% at least. This scheme has a good robustness against cutting, mean and medium filtering, especially can completely resist rotation.