Issn 2348-375x an Efficient Reversible Data Hiding Scheme Based on Two Dimensional Difference Histogram Modification of Pixel Differences

In this paper, based on two-dimensional difference histogram modification, a novel reversible data hiding (RDH)scheme is proposed by using binary space partition technique. The existing method data hiding is done by using difference pair-mapping and the data hiding aims to embed secret message into cover image. It is a natural extension of expansion embedding and shifting techniques used in current histogram-based RDH methods. By the proposed approach, compared with the conventional one-dimensional differencehistogram and one-dimensional prediction-error-histogram-based RDH methods, Here the data hiding schemes are to hide low number of data only. In this case the space also considered as a character. Since low data are only able to hide in an image. The proposed system maximums of 4,000 characters are able to embed in an image and a different frame work for hiding and extracting are provided at both nodes. A simple lossless data hiding method based on the layered base algorithm by embedding bits in all four layers is proposed. Even though four layers are processed, the parallel processing produces less time consumption.