提出一种基于误差扩散的(n,n)阈值图像分存方案.使用该分存方案可以将一幅秘密的二值图像分存成n幅有意义的半色调图像.使用这n张半色调的分存图可以无损恢复出原来的秘密二值图像,而任何少于n幅的分存图都无法得出原秘图的任何信息.实验表明,使用这个分存方案,能够产生出视觉质量较好且有意义的半色调图像,而且当任何一张分存图缺失时,恢复出来的图像都只是噪声图,分存方案的安全性得到保证.%In this paper, a new (n, n) -threshold binary image sharing scheme was proposed. The secret binary image was encoded into n meaningful halftone shares using the proposed modified error diffusion algorithm. The experimental results show that this proposed sharing scheme is secure and effective. The halftone shares generated from this scheme have good visual quality.
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