Reversible data hiding (RDH) is an active research
area in the field of information security. The RDH scheme allows
the transmission of a secret message by embedding it into a cover
image, and the receiver can recover the original cover image
along with the extraction of the secret message. In this paper, we
propose a bit plane compression based RDH scheme to hide a
sequence of secret message bits into a grayscale image. In the
proposed method, a selected bit plane of the cover image will be
compressed using run-length encoding (RLE) scheme. Further,
the RLE sequence has been efficiently encoded as a binary
sequence using Elias gamma encoding method. The Elias gamma
encoded bit sequence concatenated with the secret message bits
are used to replace the selected bit plane after performing a
sequence of Arnold transform. The Arnold transform helps to
find a new scrambled version of the bit plane which is very close
to the original bit plane to ensure the visual quality of the stego
image. The RLE is a lossless compression technique, therefore
recovery of the original image is possible by the receiver. The
experimental study of the proposed scheme on the images from
standard image dataset (USC-SIPI image dataset) shows that the
proposed scheme outperforms the existing scheme in terms of the
visual quality of the stego image without compromising the data
embedding rate.
A Reversible Data Hiding Algorithm Based on Image Camouflage and Bit-Plane Compression
