SURVEY OF REVERSIBLE IMAGE DATA HIDING WITH CONTRAST ENHANCEMENT
Keywords:Reversible data hiding, lossless data hiding, Image encryption.
This technology proposes a lossless, reversible, and the combined information activity schemes for the
cipher text pictures encrypted by the public key cryptosystems with probabilistic and the polymorphic properties within
the lossless theme, the cipher text pixels square measure replaced with the new values to implant the extra information
into many LSB-planes of the cipher text pixels by the multiple layer wet paper committal to writing. Then, the embedded
information may be directly extracted from the encrypted domain and also the information embedding operation doesn't
have an effect on secret writing of original plaintext image within the reversible theme, preprocessing is utilized to shrink
the image bar graph before the image coding, in order that the modification on encrypted pictures for the information
embedding won't cause any constituent oversaturation in plaintext domain. Though a small distortion is introduced, the
embedded information may be extracted and also a original image may be recovered from the directly decrypted image.
As a result of the compatibility between a lossless and reversible scheme, the info embedding operations within 2
manners may be at the same time performed in the associate degree encrypted image. With the combined technique, a
receiver could extract the region of embedded information before secret writing, and extract another part of embedded
information and recover initial plaintext image when secret writing.