Scheme for hiding images by finding optimal one-to-two substitution table using dynamic programming strategy

Authors: Chan, C-S; Chang, C-C

Source: Imaging Science Journal, The, Volume 55, Number 1, March 2007 , pp. 13-22(10)

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Abstract:

In 2003, Chang et al. (Pattern Recognition, 2003, 36(7), 1583–1595) proposed a way to find an optimal one-to-one substitution table using a dynamic programming strategy in image hiding. The present paper introduces a new method which uses the one-to-two substitution table to help with image hiding. First, a square-error matrix with three dimensions was built up. After applying a dynamic programming strategy on the square-error matrix, one can obtain the optimal one-to-two substitution table. According to the experimental results, the new method is capable of offering much better stego-image quality than the LSB substitution method and the one-to-one substitution method.

Keywords: IMAGE HIDING; DYNAMIC PROGRAMMING; LEAST-SIGNIFICANT-BIT SUBSTITUTION

Document Type: Research Article

DOI: http://dx.doi.org/10.1179/174313107X182020

Publication date: 2007-03-01

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