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A new image scrambling algorithm is proposed in this paper. The secret image is encrypted by both random scrambling
based on blocks and grayscale transformation based on a pseudo-random sequence, using two keys respectively. The
information embedding is implemented in the space domain through replacing the low four bits of the host image pixels
with the high four bits of the secret image pixels. A simple system of image hiding and extraction using the proposed
algorithm based on Matlab is realized, and its resistance to noising and cropping is analyzed Simulation results show that
the proposed algorithm can extract the hided image without knowing the host image information, and has the advantages
of simple implementation, large hiding capacity and good safety performance.
Yuefen Chen,Junhuan Lin,Shiqing Zhang, andCaiming Chen
"Image hiding algorithm based on block random scrambling and grayscale transformation", Proc. SPIE 7749, 2010 International Conference on Display and Photonics, 77490Y (21 July 2010); https://doi.org/10.1117/12.868947
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Yuefen Chen, Junhuan Lin, Shiqing Zhang, Caiming Chen, "Image hiding algorithm based on block random scrambling and grayscale transformation," Proc. SPIE 7749, 2010 International Conference on Display and Photonics, 77490Y (21 July 2010); https://doi.org/10.1117/12.868947