Generalized PVO‐based dynamic block reversible data hiding for secure transmission using firefly algorithm

In this paper, we proposed a novel generalized pixel value ordering–based reversible data hiding using firefly algorithm (GPVOFA). The sequence of minimum and maximum number pixels value has been used to embed the secret data while prediction and modification are held on minimum, and the maximum number of pixel blocks is used to embed the secret data into multiple bits. The host image is divided into the size of noncoinciding dynamic blocks on the basis of firefly quadtree partition, whereas rough blocks are divided into a larger size; moreover, providing more embedding capacity used small flat blocks size and optimal location in the block to write the information. Our proposed method becomes able to embed large data into a host image with low distortion. The rich experimental results are better, as compared with related preceding arts

A New Reversible Data Hiding Scheme Based on Efficient Prediction

This paper presents a new reversible data hiding scheme based on a popular technique, namely prediction error expansion (PEE). The prediction accuracy is important to the efficiency of this kind of scheme. We predict the pixels through their six round neighboring ones. And the gradient information is also taken into consideration. As a result the proposed prediction method helps us to obtain a large data hiding space. Furthermore, a sorting strategy that tries to reduce the overflow/underflow problems is employed to improve the algorithm efficiency. Experimental results prove that the proposed reversible data hiding scheme outperforms the most prior arts. ? 2014 Springer-Verlag Berlin Heidelberg.EI