Dual-Image Based Reversible Data Hiding Scheme Using Pixel Value Diffierence Expansion

In this paper, we propose a dual-image based reversible data hiding scheme. Here, we divide a secret message into sub-stream of size n bits, where n-1 bits are embedded using Pixel Value Diffierencing (PVD) and 1 bit is embedded using Diffierence Expansion (DE). We consider two consecutive pixels from cover image, calculate the difference between them and then embed n-1 bits secret message by modifying the pixel pair. Again, we consider that modified pixel pair to embed 1 bit secret message using embedding function. After that, we distribute these two stego pixel pairs among dual image depending on a shared secret key bit stream. At the receiver end, we ex- tract the secret message successfully and recover original cover image from dual stego image without any distortion. Finally, we compare our scheme with other state-of-the-art methods and obtain reasonably better performance in terms of data embedding capacity.

並列關鍵字

Diffierence expansion ； dual image ； pixel value diffierencing ； reversible data hiding

國際替代計量

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