In this paper, a separable reversible data hiding method in encrypted images is proposed. The content owner tests an original uncompressed image and generates a location map before embedding. The data-hider embeds additional data into significant bits of the selected pixels according to the location map with an embedding key. At the receiver side, the original image can be perfectly recovered by a context adaptive interpolation algorithm based on spatial correlation of adjacent pixels. If all additional data are embedded into the most significant bits of the selected pixels, quality of the directly decrypted images are poor, and if all data are embedded into the second most significant bits, perfect restoration of the original image cannot be achieved. To resolve these problems, the proposed method can ensure both good quality of the directly decrypted images and error-less restoration. Experimental results show validity and good performance of the method.
TIAN Ye, XIANG Shi-jun
. A Separable Scheme of Reversible Data Hiding in Encrypted Images[J]. Journal of Applied Sciences, 2015
, 33(6)
: 585
-594
.
DOI: 10.3969/j.issn.0255-8297.2015.06.002
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