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论文类型：期刊论文

发表时间：2010-01-01

发表刊物：Journal of Communications

收录刊物：EI、Scopus

卷号：5

期号：1

页面范围：5-12

ISSN号：17962021

摘要：A common drawback of the image sharing with steganography approaches is that the revealed secret image is distorted due to the truncation of the grayscale secret image. To lossless reveal the secret image in the (t, n)-threshold, we provide a novel sharing scheme in this article. Moreover, the original host image can be recovered by the embedded shadow images. To accomplish the above purposes, the proposed scheme derives the secret shadows and generates the meaningful shadow images by adopting the sudoku. In the new scheme, the sudoku grid is setting to 16  16 and divided into sixteen 4  4 blocks. Thus, we can embed 4  (t-1) secret bits into each pixel pair of the host image. Besides, the embeddable secret capacity can be improved according to the threshold t in the (t, n)-threshold sharing system. The experiments show that the shadows can be successfully camouflaged in the host image with satisfactory quality. The distortion of the embedded host pixels is limited within range [0, 3]. Moreover, the proposed scheme provides a large capacity for embedded secret data. ? 2010 Academy Publisher.