Pixel Value Ordering (PVO) is a data hiding technique through which pixels within an image block are ranked and modify minimum or maximum pixel value for data embedding. In this paper, we proposed an Extended Directional Improved PVO (EDIPVO) for Reversible Data Hiding (RDH) scheme. The original image pixel blocks are interpolated by inserting extra pixels between each row and each column. During data embedding, we consider a parameter \((\alpha )\), perform addition with maximum pixel value, and subtract \(\alpha \) from minimum pixel value to maintain the order within the pixel block. The parameter \(\alpha \) is dependent on the size of the original image block. To increase data hiding capacity, we have considered pixel ranking in three different directions: (1) horizontal, (2) vertical, and (3) diagonal within each block. The secret data bits are embedded starting from the largest, second largest, and so on for maximum value modification and smallest, second smallest, and so on for minimum value modification. The data embedding capacity has been improved than previous data hiding schemes while keeping visual quality unaltered. Experimental results are compared with existing state-of-the-art methods and achieve good results.
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L.F. Turner, Digital data security system. Pat. IPN wo 89, 08915 (1989)Google Scholar
T. Sharp, An implementation of key-based digital signal steganography, in International Workshop on Information Hiding (Springer, Berlin, Heidelberg, April 2001), pp. 13–26Google Scholar
J. Mielikainen, LSB matching revisited. IEEE Signal Process. Lett. 13(5), 285–287 (2006)CrossRefGoogle Scholar
J. Tian, Reversible data embedding using a difference expansion. IEEE Trans. Circuits Syst. Video Technol. 13(8), 890–896 (2003)CrossRefGoogle Scholar
A.M. Alattar, Reversible watermark using the difference expansion of a generalized integer transform. IEEE Trans. Image Process. 13(8), 1147–1156 (2004)MathSciNetCrossRefGoogle Scholar
S.K. Lee, Y.H. Suh, Y.S. Ho, Lossless Data Hiding Based on Histogram Modification of Difference Images, Advances in Multimedia Information Processing-PCM 2004 (Springer, Berlin Heidelberg, 2004), pp. 340–347CrossRefGoogle Scholar
Z. Ni, Y.Q. Shi, N. Ansari, W. Su, Reversible data hiding. IEEE Trans. Circuits Syst. Video Technol. 16(3), 354–362 (2006)CrossRefGoogle Scholar