Secret image sharing safety

Secret image sharing is an elegant method with the advantages of small share size and fault tolerance. In (n, r) sharing, one cannot obtain the secret image without collecting a sufficient number of shares. Conversely, the secret image can be recovered by collecting enough number of shares. Secret image sharing scheme has been shown to be a perfect sharing scheme, in which all pixel values are independent. The property of natural images can be exploited to reveal parts of secret is possible. This study demonstrates a simple example to show that, and proposed some suggestions to solve question.