Sharing secret image using section encoding

In recent years, many techniques of secret sharing have been proposed successively. Although these schemes have provided further protection for digital images, some problems follow it, including meaningless and enlarged sharing images and lossy reconstructed image. Meaningless sharing images will attract enemy attention easily. Enlarged images will occupy more storage space of protector. Furthermore, lossy reconstructed image will cause misjudgement of authorized owner easily. Based on the three issues, an improved secret sharing scheme using section encoding is proposed in this paper. Experimental results show that the proposed method overcomes the disadvantages of meaningless and enlarged sharing images; besides, the reconstructed secret image becomes lossless.