Image Information Hiding Based on Binary Holography of Iterative Conjugate-Symmetric Extension

摘要

An image information hiding based on binary holography of iterative conjugate-symmetric extension hologram is proposed to significantly improve the method of binarizing traditional hologram. We binarize the conjugate symmetric extension hologram, and then iterate it between the spatial and transform domain. The binary hologram after iterative repetition loses much less information than the traditional binary interference hologram, so the reconstructed image is greatly improved. Binary hologram is embedded into the medium-frequency coefficient of discrete cosine transform (DCT) of the host image, and the watermark is extracted in the form of blind detection. The simulation results show that the algorithm has much better robustness to JPEG compression, cropping, filtering, noise contamination and other common image processing. Compared with traditional method of binary interference hologram, the robustness of the watermark has been significantly improved.