Journal
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
Volume 57, Issue 5, Pages 1516-1548Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10773-018-3678-6
Keywords
Quantum image processing; Quantum image steganography; Gray code; Least-significant-bit; Embedding capacity
Categories
Funding
- Natural Science Foundation of Heilongjiang Province of China [F2015021]
- PetroChina Innovation Foundation [2016D-5007-0302]
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At present, the classical least-significant-bit (LSB) based image steganography has been extended to quantum image processing. For the existing LSB-based quantum image steganography schemes, the embedding capacity is no more than 3 bits per pixel. Therefore, it is meaningful to study how to improve the embedding capacity of quantum image steganography. This work presents a novel LSB-based steganography using reflected Gray code for colored quantum images, and the embedding capacity of this scheme is up to 4 bits per pixel. In proposed scheme, the secret qubit sequence is considered as a sequence of 4-bit segments. For the four bits in each segment, the first bit is embedded in the second LSB of B channel of the cover image, and and the remaining three bits are embedded in LSB of RGB channels of each color pixel simultaneously using reflected-Gray code to determine the embedded bit from secret information. Following the transforming rule, the LSB of stego-image are not always same as the secret bits and the differences are up to almost 50%. Experimental results confirm that the proposed scheme shows good performance and outperforms the previous ones currently found in the literature in terms of embedding capacity.
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