Efficient reversible hiding technique based on pairwise prediction error expansion

Being reversible, the original digital content can be completely restored after data extraction. Prediction-error expansion (PEE) is an important method in reversible watermarking. PEE can embed large payload with low distortion into digital images. PEE is advantageous use in image redundancy usually gives better performance. But, the correlations between prediction-errors are not regarded and not use in conventional PEE based methods. In PEE, the prediction-errors are expanded and modified individually for embedding the data. In this paper an efficient reversible watermarking technique has proposed. In this paper every two adjacent prediction-errors together consider as pair. And generate a sequence which consisting of prediction-error pairs. Then Pixel selection method is used for sorting in decreasing order of prediction pair. To make a sequence of prediction error pairs, we making 2D prediction-error histogram. With the help of 2D histogram an efficient embedding strategy namely pairwise prediction error expansion can be designed. Prediction error pairs was expanding and shifting in histogram bins. Expanded bin are embed data. To achieve an improved performance we use a reduced size of location map. The result of our method is better is verified through many experiments.