Reversible Image Data Hiding with Contrast Enhancement
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Description
In our proposed method we embed the given data in the cover image and we retrieve the data along with the cover image. For embedding data in image there are many algorithms available. In this paper we propose Histogram Shifting to embed text in the image. The embedded data along with the cover image is retrieved by the shifting operations. In the previous works the cover images were not completely restored. Histogram shifting (HS) is a useful technique of reversible data hiding (RDH). With HS-based RDH, high capacity and low distortion can be achieved efficiently. In this paper, we revisit the HS technique and present a general framework to construct HS-based RDH. For data embedding, certain pixel values are shifted to create vacant spaces whereas some others are manipulated to carry hidden data by filling the created vacant spaces. A general framework to construct HS-based RDH is presented. According to the proposed general framework, one can get a HS-based RDH algorithm by simply designing the so called shifting and embedding functions.