摘要
针对秘密图像共享产生无意义影子图像的问题,为了减少影子图像的噪点,把秘密图像分割成小块,并重新分组;然后通过比较图像块相似度把秘密图像共享到载体图像中,得到含有秘密图像的马赛克图像;最后采用可逆的信息隐藏技术,把位置信息隐藏到马赛克图像中,得到有意义的影子图像。实验表明,该算法可以提高影子图像的质量,与Zhai等人的算法相比,马赛克图像的PSNR平均提高了7 d B。结论证明该算法增强和保障了秘密图像的安全性和完整性。
This paper proposed an improved algorithm which generated meaningful shadow image based on mosaic technology for the problem that many secret image sharing algorithms were easy to generate shadow image like noise. In order to reduce noise in the shadow image, it divided secret image into small blocks and regrouped them by a key. Then, it shared secret image into cover image through comparing the similarity between images pixels. It could obtain the mosaic images which contained secret image. Finally, it hid location information into the mosaic images through reversible information hiding technology, so that it could get some complete and meaningful shadow images. The experimental results indicate that this algorithm greatly improves the quality of the shadow image by comparing the similarity of secret image and cover image. Comparing with Zhai＇ s algorithm, the generated mosaic images＇ PSNR increases about 7 dB by average. The conclusions prove that the algorithm enhances and guarantees the security and integrity of secret image during image sharing.
出处
《计算机应用研究》
CSCD
北大核心
2016年第11期3480-3484,共5页
Application Research of Computers
关键词
秘密图像共享
信息隐藏
相似度
马赛克图像
峰值信噪比
安全性
secret image sharing
information hiding
similarity
mosaic image
peak signal to noise ratio（PSNR）
security
