Papers by Keyword: HVS

Abstract: Image information hiding is a way of concealing secret information within another image or file. The previous researches of image information hiding extract secret by calculating. An algorithm based on HVS (Human Visual System) is proposed in this paper. We first decide the embedding region and embedding strength of secret image based on edge and texture information. Then, a pair of invert images is chosen as the cover images, and the stego images are constructed by modifying the pixels of the cover images through the proposed criterion. Correspondingly, the secret image can be recovered through overlaying the two stego images.

Abstract: To protect the copyright information of digital images, this paper presents a combination of Particle Swarm Optimization and turbo code of the image watermarking algorithm. Firstly, in order to enhance the security of watermark information, binary image is encrypted by Aronld transform and error correction coding technology. Based on the block of the host image, according to human visual properties, make discrete cosine transform to the block with larger texture complexity, and embed the watermark information in the low frequency coefficients of discrete cosine transform with the embedding intensity of watermarking searched by PSO. The simulation results show that the algorithm not only improves the security of the watermarking, but also has better robustness and invisibility of the watermarking.