Lossless Image Recovery Using Reversible Data Hiding

Recently, more and more importance is given to reversible data hiding (RDH) technique in images, since it has the capability of recovering the original image which is used for embedding data, without loss protecting the image content’s confidentiality. All previous methods embed data by reversibly vacating room from the images, which may be subject to some errors on data extraction and/or image restoration. This project propose a novel method by reserving room before embedding data in an image using a traditional RDH algorithm, and thus making it is easy for the reversibility of embed data in the image. The proposed method can achieve real reversibility, that is, data extraction and image recovery are free of any error. Experiments show that this novel method can embed more than 10 times as large payloads for the same image quality as the previous methods, such as for PSNR = 50dB.